Option C, i.e., 180 Given, The gene for a certain amoeba, which is 300 bp long, the (A+T)/(C+G) = 0.666
We need to find how many adenine nucleotides are in the gene
Formula to calculate the number of adenine nucleotides in a gene is:
Number of adenine = Percentage of adenine x total number of nucleotides in the gene / 100
Percentage of adenine = (A + T) / (A + T + C + G)
= (1 - C + G) / (A + T + C + G) = 1 - (A + T) / (A + T + C + G)
= 1 - 0.666
= 0.334
Now,
Number of adenine = 0.334 × 300 / 2 = 180
Therefore, the correct option is C, i.e., 180.
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What are the three main componets of dna molecule?
Answer:
Explanation:
The three main components of dna molecule are phosphate, a sugar called deoxyribose, and four nitrogenous bases—adenine, guanine, cytosine, and thymine.
Answer
a region containing nitrogen which is called nitrogenous base
a molecule containg carbon-sugar called deoxyribose
a phosphorus-containing region called phosphate
explanation:
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Answer:
yeah it's answer is biodiversity
Why did the Silurian period end?
Answer:
a series of exinction event led to climate change
Explanation:
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What type of galaxy is pictured below?
A) Irregular
B) Spiral
C) Lens
D) Elliptical
according to the size principle of motor recruitment, in what order will muscle fibers be recruited during activity? issa
According to the size principle of motor recruitment, muscle fibers are recruited in a specific order during activity. The order of recruitment is based on the size of the motor units, which is determined by the size of the muscle fibers.
The size principle of motor recruitment states that motor units are recruited in order of their size. Motor units consist of a motor neuron and all the muscle fibers it innervates. Small motor units are recruited first, followed by progressively larger motor units, as muscle force requirements increase. The order of recruitment of motor units is directly related to the size of the motor neuron, with smaller neurons innervating small motor units and larger neurons innervating large motor units. This allows for more precise control of muscle force during activity. For example, during a low-intensity activity such as standing, small motor units are recruited, whereas during a high-intensity activity such as lifting a heavy weight, larger motor units are recruited.
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If the strand of dna with the sequence tga mutated to gga, would this be a silent or missense mutation?
If the strand of DNA with the sequence TGA mutated to gga, this will be a silent or missense mutation
A mutation is a change to an organism's DNA sequence. Errors in DNA replication during cell division, exposure to mutagens, or viral infection can all cause mutations.
The DNA sequence of a gene is altered to generate a different result, which is known as a genetic mutation. The DNA sequence of that gene is permanently altered. For humans to develop, which is the process of change over a number of generations, genetic variances are crucial. In one person, a spontaneous genetic mutation takes place. A mutation happens when a DNA gene is harmed or altered in a way that modifies the genetic code the gene carries.
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15
Approximately how many degrees does Earth rotate on its axis over this five-hour period?
15°
45
75"
90°
A
Eliminator
8
Line Reader
Reference
CA
Period
Over a five-hour period, Earth rotates approximately 75 degrees on its axis. This calculation is based on the proportion that relates the time taken for Earth's complete rotation (24 hours) to the corresponding degrees of rotation (360 degrees).
The rotation of the Earth on its axis takes approximately 24 hours to complete one full rotation, which equals 360 degrees. To calculate how many degrees Earth rotates over a specific time period, we can use a simple proportion.
In this case, we have a time period of 5 hours. We can set up the proportion:
5 hours is to x degrees as 24 hours is to 360 degrees.
Using cross-multiplication, we can solve for x:
5 hours * 360 degrees = 24 hours * x degrees
1800 degrees = 24x
Dividing both sides by 24:
1800 degrees / 24 = x degrees
75 degrees = x
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Which physical adaptations increase a plant’s chances of growing in grasslands?
(Select all that apply.)
A. having deep roots to survive grazing animals
B. having leaf shapes that do not hold water
C. having waxy leaves
D. having deep roots to survive fires
Answer:
Explanation:
A. having deep roots to survive grazing animals
B. having leaf shapes that do not hold water
D. having deep roots to survive fires
Plants that grow in grasslands must be able to survive in a variety of conditions, including hot temperatures, dry conditions, and frequent fires. In order to do so, they have developed a number of physical adaptations that increase their chances of survival.
One adaptation that helps plants survive grazing animals is having deep roots. These roots can allow the plant to access water and nutrients that are deeper in the soil, which can help it survive even when the surface of the soil has been damaged by grazing animals.
Another adaptation that helps plants survive in grasslands is having leaf shapes that do not hold water. This can help prevent the plant from losing water through evaporation, which is especially important in hot and dry conditions.
Having deep roots can also help plants survive fires, as these roots can allow the plant to access water and nutrients that are deeper in the soil and help it regenerate after a fire.
While having waxy leaves can help some plants retain moisture in dry conditions, it is not necessarily an adaptation that is specific to grasslands.
Remember that c is dominant to t and that c leads to increased darkness in moth wings.
(a) What will be the offspring genotypes and phenotypes (and their frequencies) if a tt moth mates with a tt moth? tt x tt = tt All the offspring will have low level of cortex gene expression, because both the alleles of offspring will be recessive. Genotype: tt. Frequency: 1 (100%) Phenotype: offspring with low level of cortex gene expression.1 (100%). All the offspring will have low level of cortex gene expression.
(b) What will be the offspring genotypes and phenotypes (and their frequencies) if a tc moth mates with a tc moth? tc. ×. tc. Genotypes, tt , frequency:. 1/4. (25%) tc. , frequency.: 1/2. (50%) cc , frequency:. 1/4. (25%) Phenotype, offspring with low level of cortex gene expression :1/4. (25%) offspring with intermediate level of cortex gene expression: 1/2. (50%) offspring with high level of cortex gene expression: 1/4. (25%). 50% of the offsprings will be with intermediate level of cortex gene expression, 25% with low level of cortex gene expression, remaining 25% with high level of cortex gene expression.
(c) What will be the offspring genotypes and phenotypes (and their frequencies) if a cc moth mates with a tc moth? cc x ct Genotype: cc, Frequency: 1/2. (50%) ct, Frequency: 1/2. (50%). Phenotype: offspring with intermediate level of cortex gene expression; 1/2. (50%) offspring with high level of cortex gene expression; 1/2. (50%). There will be no offspring with low level of cortex gene expression
In summary, the dominant gene "c" leads to increased darkness in moth wings. When two recessive "t" alleles mate, all offspring will have low levels of cortex gene expression.
When two heterozygous "tc" moths mate, there will be a 50% chance of intermediate levels of cortex gene expression, a 25% chance of low levels, and a 25% chance of high levels in their offspring. Finally, when a homozygous dominant "cc" moth mates with a heterozygous "tc" moth, there will be a 50% chance of intermediate levels of cortex gene expression and a 50% chance of high levels, with no offspring having low levels. The frequencies of each genotype and phenotype depend on the specific mating combination.
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Which two organ systems Skelworking together to produce movement?
Answer:
Muscular and Skeletal
Explanation:
The Muscular and Skeletal systems work together to move appendages and joints. They are sometimes referred to as the Musculoskeletal System.
Hypothesize Imagine that you are digging in your garden and find some tiny threadlike animals making thrashing movements. Make a hypothesis about what these animals might be.
Based on the description of the tiny threadlike animals making thrashing movements, it is possible that they could be nematodes or roundworms.
Nematodes or roundworms are small, unsegmented worms that are commonly found in soil and can range in size from less than 1 mm to over 1 m in length. Some species of nematodes are known to thrash around when disturbed, so it is possible that the animals observed in the garden could be nematodes.
However, further examination and analysis would be needed to confirm the identity of these animals. It is important to note that there are many different types of organisms that can be found in soil, and it is always important to exercise caution and use appropriate protective gear when working with soil or handling potentially harmful organisms.
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how do you do these ?
Starting in 1850 when Europe become industrialized, the frequency of melanic forms of the peppered moth in populations ______ until they made up ______ of some population.
Answer:
increased; almost 100%
Explanation:
The peppered moth witnessed a change in its color and the number at the end of the eighteenth century. The reason behind this was the Industrial Revolution that led to an increase in air pollution. With the increase in air pollution, the dark-colored moths increased in the number. Later, when air pollution decreased, the light-colored moths started to predominate. It was in 1895 that the number of dark-colored moths increased to the maximum.
will the allele frequencies in the breeding pens tend to move toward the frequency in the larger field population? yes, because the breeding pen populations were established from the field population. no, because the breeding pen populations are now independent of the field population.
The answer is: Yes, because the breeding pen populations were established from the field population. The allele frequencies in the breeding pens tend to move toward the frequency in the larger field population.
When breeding pen populations are established from a larger field population, they typically represent a subset of the genetic diversity present in the field population.
However, over time, the allele frequencies in the breeding pens are expected to move toward the frequency observed in the larger field population.
This is because the breeding pens are essentially a smaller sample of the original population, and through reproduction and genetic mixing within the pens, the genetic diversity tends to align with that of the larger field population.
Therefore, the allele frequencies in the breeding pens tend to converge toward the frequencies observed in the field population.
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since proteins and __ are being made during G1, there is a great amount of __ occurring
Answer:
Since proteins and enzymes are being made during G1, there is a great amount of protein synthesis occurring.
Explanation:
Since proteins and organelles are being made during G1, there is a great amount of metabolic activity occurring.
What is G1 phase?The G1 phase, or Gap 1 phase, is the first phase of the cell cycle in which cells grow and prepare for DNA replication. During G1, cells undergo a period of metabolic activity in which they synthesize RNA, proteins, and organelles in preparation for the S phase, where DNA replication takes place. Cells also monitor their internal environment and external signals to ensure that conditions are favorable for DNA replication.
If the cells receive the appropriate signals and are deemed healthy, they will proceed to the S phase, where DNA replication occurs. However, if conditions are unfavorable, cells may pause or exit the cell cycle and enter a state of quiescence or undergo cell death. The G1 phase is a crucial checkpoint in the cell cycle, as it ensures that the cell has adequate resources and favorable conditions to replicate its DNA accurately and divide properly.
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In an experiment, 90 newborn flies are divided evenly into three separate
groups and placed in boxes inside an incubator that is maintained at a
constant temperature of 30°C. On a daily basis, the first group is given water
containing 1 mg/mL of sugar; the second is given water containing 2 mg/mL
of sugar; and the third is given water containing 3 mg/mL of sugar. After four
weeks, the average length of the flies in each group is determined.
Which factor is the dependent variable in this experiment?
A. Average length of flies in a group
B. Concentration of sugar in the water
C. Number of flies in a group
D. Temperature of the incubator
Answer:
A. average length of files in a goup
which molecule is important in regulating cell membrane fluidity?
Answer:
cholesterol plays a distinct role in determining membrane fluidity.
Cholesterol has a specific impact on how fluid a membrane is. With their polar hydroxyl groups adjacent to the hydrophilic head groups of the phospholipids, cholesterol molecules enter the bilayer.
How does cholesterol regulate cell membrane fluidity?The phospholipid bilayer's random distribution of cholesterol molecules aids the bilayer's ability to remain fluid under a variety of environmental conditions.
Cells control membrane fluidity by modifying the lipid composition of the membrane. A lipid bilayer's fluidity fluctuates according to temperature. Lipid bilayers become more fluid, porous, or leaky at increasing temperatures (like butter melting on a hot day).
Cholesterol makes the cell membrane less fluid at higher temperatures and more fluid at lower temperatures.
Therefore, cholesterol is the chemical in the plasma membrane that has an impact on the fluidity of the membrane.
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Which of the following best describes the pattern of evolution of the horse?
A. The ancestors of the horse were much shorter and had four toes. As they evolved they grew larger and their toes fused into one hoof.They evolved away from eating leaves and now just eat grass.
B. The ancestors of the horse were much larger and had four toes. As they evolved they grew smaller and their toes fused into one hoof.They evolved away from eating leaves & now just cat grass.
C. The ancestors of the horse were much shorter &had one hoof.As they evolved they grew larger and their hooves separated into 4 toes. They evolved away from eating meat and now just eat grasses & leaves.
D. The ancestors of the horse were much larger and had four toes. As they evolved they grew smaller and their toes fused into one hoof.
They evolved away from eating meat and now just cat grasses and leaves
Please help me
Answer:
A.
Explanation:
A. The ancestors of the horse were much shorter and had four toes. As they evolved they grew larger and their toes fused into one hoof.They evolved away from eating leaves and now just eat grass.
because:-
the first members of the horse family, the dog-sized Hyracotherium and use to eat leafs. They were much smaller than horse today.
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White fruit color in summer squash is governed by a dominant gene (W) and colored fruit by its
recessive allele (w). Yellow fruit is governed by gene (G) and green by its recessive allele (g). When
parents heterozygous for both alleles are crossed, the offspring appear in the ratio 12 white: 3
yellow: 1 green. What fruit color ratios are expected from the cross of WwGg x Wwgg?
The cross between WwGg and Wwgg parents is expected to result in offspring with fruit colour ratios of 9 white: 3 yellow: 4 green.
In the given cross, WwGg represents the genotype of one parent (heterozygous for both white and yellow fruit colour genes), while the other parent has the genotype Wwgg (heterozygous for white fruit colour and homozygous recessive for green fruit colour).
To determine the fruit colour ratios in the offspring, we need to consider the inheritance patterns of the genes involved. The white fruit colour gene (W) is dominant over the coloured fruit allele (w), while the yellow fruit colour gene (G) is dominant over the green allele (g).
By using a Punnett square, we can calculate the expected genotypes and phenotypes of the offspring. The Punnett square for this cross would yield genotypes WWGg, WWgg, WwGg, and Wwgg in a ratio of 1:1:4:4.
Based on the genotypes, we can determine the fruit colour ratios. WWGg and WWgg will result in white fruit, while WwGg and Wwgg will yield white and green fruit, respectively. Therefore, the expected fruit colour ratios from the cross WwGg x Wwgg are 9 white: 3 yellow: 4 green.
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por que un globo con aire se agranda al sol y se achica en la heladera
Answer: El globo congelado se contrajo porque la energía cinética promedio de las moléculas de gas en un globo disminuye cuando la temperatura disminuye. Esto hace que las moléculas se muevan más lentamente y tengan colisiones menos frecuentes y más débiles con la pared interior del globo, lo que hace que el globo se encoja un poco.
Explanation:
According to decay theory, why does forgetting occur? Select one: a. because of the deterioration of the nervous system with increasing age.
b. because of competition from other memories
c. because of ineffective encoding of information.
d. because of the passage of time.
Which of the following is reflected in Sigmund Freud's concept of repression? Select one: a. ineffective encoding b. interference
c. decay d. retrieval failure
According to decay theory, forgetting occurs because of the passage of time.
Sigmund Freud's concept of repression reflects the idea of retrieval failure.
Forgetting is a common phenomenon in human memory, and decay theory suggests that it happens due to the natural fading or weakening of memories over time. When information is encoded into our memory, it creates neural connections and pathways in the brain. However, these connections can gradually weaken or decay if they are not reinforced or accessed frequently.
The main idea behind decay theory is that memories that are not regularly reinforced or retrieved may gradually decay, becoming more difficult to retrieve accurately. This decay occurs at the neural level, as the connections between neurons weaken over time, making the memory traces less effective in retrieving the information. As a result, memories that are not actively maintained through rehearsal or retrieval can become less accessible and eventually fade away.
Repression is a concept introduced by Sigmund Freud in psychoanalytic theory, and it refers to the unconscious blocking of traumatic or distressing memories from conscious awareness. According to Freud, individuals may repress memories that are too threatening or painful to consciously remember, pushing them into the unconscious mind.
Repression aligns with the concept of retrieval failure because the memories that have been repressed are not readily accessible to conscious retrieval. While the memories may still exist in the unconscious, they are effectively blocked or "forgotten" from the conscious awareness.
When attempts are made to retrieve repressed memories, they may remain inaccessible due to the psychological defense mechanism of repression. These memories are effectively "hidden" from conscious recall, making retrieval difficult or even impossible without specialized therapeutic techniques.
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how does each of your mutations affect the amino acid sequences? Are the mutations missense mutations, silent mutations or nonsense mutations?
a. Point mutation?
b. Frameshift-insertion?
c. Frameshift-deletion?
Answer:
the correct answer is B Frame shift insertion
Explanation:
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Frameshift-insertion mutations affect the amino acid sequences.
Thus, The insertion or deletion of nucleotide bases in amounts that are not multiples of three is referred to as a frameshift mutation in a gene.
This is significant because a cell reads the genetic code for proteins in groups of three nucleotides.
These so-called "triplet codons" each stand for one of the 20 different amino acids that go into making a protein. This normal reading frame will be disrupted by a mutation, which will result in an inaccurate reading of the entire gene sequence after the mutation.
Thus, Frameshift-insertion mutations affect the amino acid sequences.
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An experimental population contains a dominant allele T with frequency 0.65. What is the frequency of the recessive allele t
To find the frequency of the recessive allele t, we first need to know the frequency of all the alleles in the population. Since there are only two alleles in this population (T and t), we can find the frequency of t by subtracting the frequency of the dominant allele T from 1 (since the frequency of all alleles in a population must add up to 1):
Frequency of t = 1 - Frequency of T
Frequency of t = 1 - 0.65
Frequency of t = 0.35
Therefore, the frequency of the recessive allele t in the experimental population is 0.35.
Hi! In order to find the frequency of the recessive allele t, we can use the Hardy-Weinberg equilibrium formula, which states that p^2 + 2pq + q^2 = 1, where p represents the frequency of the dominant allele (T) and q represents the frequency of the recessive allele (t).
Since the frequency of the dominant allele T is given as 0.65, we can represent p as 0.65. To find the frequency of the recessive allele t (q), we can use the formula p + q = 1.
So, 0.65 + q = 1.
Solving for q, we get q = 1 - 0.65, which gives us q = 0.35.
Therefore, the frequency of the recessive allele t is 0.35.
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in an unpreserved and old urine specimen, there could be difficulty differentiating between bacteria and:
In an unpreserved and old urine specimen, there could be difficulty differentiating between bacteria and yeast.
When an unpreserved urine specimen is left for an extended period of time, it undergoes various changes due to the growth of microorganisms and degradation of cellular components. Bacteria and yeast are two types of microorganisms that can be present in urine.
Bacteria are typically the most common microorganisms found in urine specimens. They can multiply rapidly in urine that is left at room temperature for an extended period.
In fresh urine samples, bacteria can be identified through microscopic examination and culture techniques.
However, in old and unpreserved urine specimens, bacteria can undergo autolysis and lose their characteristic features, making it difficult to differentiate them from other microorganisms.
Yeast, specifically Candida species, is another type of microorganism that can be present in urine. Like bacteria, yeast can grow and multiply in unpreserved urine specimens over time.
However, yeast cells are larger than bacteria and can exhibit morphological characteristics such as budding or pseudohyphae, which can aid in their identification.
Therefore, in an unpreserved and old urine specimen, the differentiation between bacteria and yeast may become challenging due to the autolysis of bacteria and the potential alteration of yeast morphology.
Proper preservation and timely analysis of urine specimens are essential to ensure accurate identification of microorganisms.
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Homework 1.2
Gutierrez
Graph and fully describe the function f(x)=x²+3.
Graph values of x from -3 to 3.1-69 HW
e Tool (Desmos). Homework Help
-2
-1
0
1
2
-10
T
--5
f
10
en
0
-10
X
10
The graph is a visual representation of information. It is shown by the x and y-axis. f(x)=x²+3.
What is a graph?The graph is a visual representation of information. It is shown by the x and y-axis. The given equation is f(x)=x²+3.
In first case, f(x)=x²+3, x = − 3
f(x)=x²+3
= (− 3 ) ² + 3
= 9+ 3
= 12
f(x)=x²+3 = (− 2 ) ² + 3
= 4+ 3
=7
f(x)=x²+3
= (− 1 ) ² + 3
= 1 + 3= 4
Therefore, The graph is a visual representation of information. It is shown by the x and y-axis.
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What is the role of the dorsolateral prefrontal cortex?
The dorsolateral prefrontal cortex (DLPFC) is a frontal lobe brain area that is thought to be involved in a variety of higher cognitive activities. This part of the brain is in charge of executive activities including decision making, problem solving, and working memory.
The DLPFC is also linked to abstract thinking, reasoning and cognitive flexibility. The DLPFC is important for behaviour control because it participates in the choosing of appropriate reactions to events as well as the suppression of incorrect responses. Since it is engaged in the processing of information related to accomplishing a certain goal, it is especially critical for the establishment and maintenance of goal-directed actions. The DLPFC also participates in the integration of information from other sources, including as sensory input, emotional states, and social signals.
The DLPFC is engaged in the selection of relevant information from the environment as well as the filtering out of irrelevant information, hence it plays a vital part in attention management. It is also important in the regulation of emotions since it inhibits emotional reactions.
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The survival of a species depends on its ability to adapt to changes in the environment. A species must be capable of surviving and reproducing despite changes to food sources, climate, or threats from predators. Which statement correctly describes a way that mutations increase the likelihood that a species will survive in a changing environment?
Mutations are always passed on to subsequent generations of the species
Mutations lead to genetic variation
Mutations are the cause of disease in the species
Mutations are not harmful when they occur in somatic cells of a species
Answer:
Your answer is B) Mutations lead to genetic variation.
Think of it like this, when rays were first starting to develop, they probably started with only one kind, stingless. Somewhere down the line, the genes of the rays started to mutate and eventually, there were stingrays and stingless rays. Now at this point there are predators that frequently feast upon the rays, so which of the two rays are more likely to defend themselves, and get away to live long enough to reproduce and pass on their genes? The stingrays! The mutation that may have occurred millions of years ago, has determined which organisms were more fit for a changing environment.
The survival of the species depends on the resources available and environmental conditions. The species or organisms capable to adapt to the surrounding have higher chances of reproduction and survival.
The correct answer is:
Option B: Mutations lead to genetic variation
The organisms adapting to the surrounding will undergo an alteration in their genetic sequence, known as mutations. The mutations are heritable and lead to genetic variation.
The mutation leads to genetic variation as:
It leads to the introduction of new alleles in the gene pool.Sexual reproduction and random mating also contribute to genetic variation. The mutations are heritable, and thus can cause an increase in the frequency of the mutated allele in the gene pool.
Thus, the correct answer is that mutation leads to genetic variation.
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in the winter, many manatees live in the florida everglades. manatees are completely herbivorous. their diet consists of floating plants and other vegetation. what is the original source of the energy that the manatee gets from eating plants? hmh
The genetic code is a set of rules that determines the correspondence between the nucleotide sequence in mRNA and the amino acid sequence in a protein. It is based on the triplet codons, where each three nucleotides in mRNA correspond to one amino acid in the protein sequence. There are 64 possible codons, of which 61 code for amino acids and the remaining three are stop codons that signal the end of translation.
One of the features of the genetic code is that it is degenerate or redundant, meaning that more than one codon can code for the same amino acid. This is due to the fact that there are only 20 amino acids, but 64 possible codons, so some amino acids are coded by multiple codons. For example, isoleucine is coded by the codons AUU, AUC, and AUA.
The reason why the AUU, AUC, and AUA codons all specify the amino acid isoleucine is because they share the same first two nucleotides (AU) and differ only in the third nucleotide (U, C, or A). This property is known as codon bias or codon usage bias and is thought to be a result of evolutionary selection pressure. Codon bias is thought to be influenced by factors such as the abundance of tRNA molecules that recognize the codons, the efficiency of translation, and the accuracy of protein synthesis. In summary, the degeneracy of the genetic code and codon bias are two features that explain why the AUU, AUC, and AUA codons all specify the amino acid isoleucine.
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Describe the process of photosynthesis to explain at least 1 requirement for photosynthesis that would need to be considered for chloroplasts to function in an animal or a human.
Answer:
the process by which green plants and some other organisms use sunlight to synthesize nutrients from carbon dioxide and water. Photosynthesis in plants generally involves the green pigment chlorophyll and generates oxygen as a by-product.
Question 3 of 10
How is an organism's genetic information conserved during DNA replication?
A. Each DNA molecule is split into two strands so that each daughter
cell can receive one strand.
B. Entirely new DNA molecules are built from original molecules so
the old DNA can be discarded.
OC. The strands of each DNA molecule are separated so that each
resulting molecule has one original strand and one new strand.
OD. All new DNA is built from the same template strand so that the
parent cell keeps the original and the daughter cell receives the
copy.
The strands of each DNA molecule are separated so that each resulting molecule has one original strand and one new strand. The correct option is C
What is genetic information?Genetic information are the information about an individual's genetic tests and the genetic tests of an individual's family members as well as information about the manifestation of a disease.
DNA is the hereditary material in humans and almost all other organisms. Most DNA is located in the cell nucleus where it is called nuclear DNA but a small amount of DNA can also be found in the mitochondria where it is called mitochondrial DNA.
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