Which of the following statements are true about proteins? Mark any or all that apply. As described in class, there is just one basic type of protein secondary structure, alpha helices The primary structure of proteins link amino acids together via peptide bonds Proteins may be composed of different structural domains, each with its own function Unlike sugars, amino acids as a rule do not have chiral centers and do not display "handedness" All twenty types of amino acids are equally likely to be present in the interiors of globular proteins
Answers
Proteins are large, complex biomolecules that play an essential role in the human body. They are made up of long chains of amino acids, which are linked together by peptide bonds to form polypeptides.
Proteins are large, complex biomolecules that play an essential role in the human body. They are made up of long chains of amino acids, which are linked together by peptide bonds to form polypeptides. Proteins perform a wide variety of functions in the human body, including catalyzing biochemical reactions, serving as structural elements, and transmitting signals between cells. Below are the statements that are true about proteins: Proteins may be composed of different structural domains, each with its own function. The primary structure of proteins link amino acids together via peptide bonds. All twenty types of amino acids are equally likely to be present in the interiors of globular proteins. There is not just one basic type of protein secondary structure, alpha helices. Unlike sugars, amino acids as a rule do have chiral centers and display "handedness". Therefore, options b, c, and e are the correct options. They accurately describe the features and structure of proteins.
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Related Questions
TOPIC: CARBONS BONDS
I need a formula with 14 carbons, using single and double bonds
PLEASE, I WILL GIVD YOU CROWN
Answers
One possible formula with 14 carbons, using single and double bonds, is C7H10O3.
Start with a carbon backbone: C-C-C-C-C-C-C-C-C-C-C-C-C-C.This gives you 14 carbon atoms connected in a straight chain.To introduce double bonds, we need to remove two hydrogen atoms and create double bonds between adjacent carbon atoms. Let's choose the 3rd and 4th carbon atoms from the left.Remove two hydrogen atoms from the 3rd and 4th carbon atoms: C=C-C=C-C-C-C-C-C-C-C-C-C.Now, we need to balance the number of hydrogen atoms. Each carbon atom should have four bonds. Since we removed two hydrogen atoms, we need to add two double bonds.Introduce two double bonds between the 1st and 2nd carbon atoms and between the 6th and 7th carbon atoms: C=C-C=C-C=C-C-C-C-C-C-C-C.To complete the formula, add hydrogen atoms to each carbon atom to satisfy the valency.
The final formula, with 14 carbons and using single and double bonds, is C7H8.
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true or false? Transcription factors regulate the gene expression either by enhancing transcription, attracting RNA polymerase, or block the access to certain
genes.
Answers
True. Transcription factors regulate gene expression by binding to specific DNA sequences, either enhancing or blocking the transcription of genes by attracting or repelling RNA polymerase.
RNA polymerase is an enzyme that synthesizes RNA from a DNA template. It catalyzes the transcription of DNA into RNA by adding ribonucleotides to a growing RNA strand complementary to the template DNA strand. RNA polymerase is a complex enzyme, and different types exist in different organisms.
In eukaryotes, RNA polymerase II is responsible for the transcription of most protein-coding genes.DNA (deoxyribonucleic acid) is a long, double-stranded biomolecule that carries the genetic instructions used in the development, functioning, and reproduction of all living organisms.
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What are things to look for in a liver function blood test?.
Answers
The blood level of certain proteins and activity of certain enzymes are some things to look for in a liver function test.
What is a liver function test?A liver function test is a test that tests the function of the liver.
The liver is the largest organ in the body and performs many functions such as
detoxification and protein synthesis.In a liver function test, the level of certain proteins and activity of certain enzymes are assayed such as:
BilirubinAspartame tranaminase.alkaline phosphatase.In conclusion, a liver function test assays protein levels and specific enzyme activity.
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Which type of bond SHARES electrons ?
A.Covalent
B.lonic
C.Hydrogen
Answers
Answer:
A.Covalent
Explanation:
A covalent bond is a chemical bond that involves the sharing of electron pairs between atoms.
xXxAnimexXx
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Answer:
A-Covalent
Explanation:
When two Covalent atoms interact or get close, their electrons are attracted to the positive proton. Due to positive and negative attract. Because there is both a strong enough attraction , the atoms share electrons.
during an ige-mediated hypersensitivity reaction, which leukocyte is activated? group of answer choices neutrophils monocytes eosinophils t lymphocytes
Answers
During an IgE-mediated hypersensitivity reaction, eosinophils are primarily activated.
IgE-mediated hypersensitivity reactions, also known as Type I hypersensitivity reactions, involve the activation of various immune cells. In these reactions, the initial exposure to an allergen triggers the production of specific IgE antibodies by plasma cells. These IgE antibodies bind to Fc receptors on the surface of mast cells and basophils, sensitizing them.
Upon subsequent exposure to the same allergen, cross-linking of the IgE antibodies occurs, leading to the degranulation of mast cells and basophils. This degranulation releases numerous inflammatory mediators, such as histamine, leukotrienes, and cytokines, which contribute to the characteristic symptoms of the allergic reaction.
Among the leukocytes involved in the response, eosinophils play a crucial role. Eosinophils are attracted to the site of the allergic reaction by the released chemotactic factors. Once recruited, eosinophils release their own inflammatory mediators, such as major basic protein, eosinophil cationic protein, and eosinophil-derived neurotoxin.
These mediators are particularly effective against parasitic infections and contribute to the prolonged inflammation seen in chronic allergic conditions like asthma and allergic rhinitis.
In contrast, neutrophils, monocytes, and T lymphocytes are not the primary cells activated in IgE-mediated hypersensitivity reactions. Neutrophils are typically involved in acute bacterial infections, while monocytes play a role in phagocytosis and antigen presentation.
T lymphocytes are more prominent in delayed hypersensitivity reactions mediated by T cells, such as Type IV hypersensitivity reactions.
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which of the following statements about breeding systems is true?a. genetic analyses of parentage have not furthered our understanding of mating systemsb. the occurrence of extrapair copulations triggered ethologists to consider the difference between social and genetic monogamyc. mating systems are classified solely on the basis of pair bond formation.d. within a species, only one type of mating system can evolve.e. all human populations adhere to strict monogamy, that is, both social monogamy and genetic monogamy.
Answers
The explanation that is valid about rearing frameworks is The event of extrapair fornications set off ethologists to think about the distinction between social and hereditary monogamy. The correct answer is (B).
Extrapair relations (EPCs) are sexual connections that happen beyond a couple of bonds in socially monogamous species. The existence of EPCs has prompted a rethinking of how mating systems are categorized and has cast doubt on the conventional understanding of social monogamy. EPCs and a species' genetic mating system have been identified through genetic analyses of parentage. Other factors, such as mate guarding, sperm competition, and mate choice, also play a role in the classification of mating systems. Depending on social and environmental factors, a species may evolve multiple mating systems. Even though many human societies encourage monogamous relationships, not all populations adhere to it strictly.
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2. An acorn is eaten by a squirrel and the squirrel is eaten by an owl. Show this feeding relationship
as a food chain. Label the producer, carnivore and the herbivore. (6 points)
Answers
Answer:
Producer: Acorn
Herbivore: Squirrel
Carnivore: Owl
Explanation:
Keep in mind not all squirrels are herbivores but these are the ones commonly found and this is the answer in accordance with the question.
The ______ carries urine from the kidney to the bladder, and the ______ carries urine from the bladder to the outside of the body.
Answers
The Ureter Carries urine from the kidney to the bladder, and the Urethra carries the urine to the outside
The urinary systemThe ureter carries urine from the kidney as a waste product obtained from the consumption of food and liquid substance to the bladder, which acts as a temporary storage of urine. When the bladder storage is saturated the urine is released to the outside of the body through the urethra.
Hence we can conclude that The Ureter Carries urine from the kidney to the bladder, and the Urethra takes the urine outside the body.
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What is the purpose of an enzyme? A. To decrease the activation energy of a reaction to make it occur more slowly. B. To increase the activation energy of a reaction to make it occur more quickly. C. To decrease the activation energy of a reaction to make it occur more quickly. D. To increase the activation energy of a reaction to make it occur more slowly.
Answers
Some bacteria can't survive
in the presence of oxygen.
Which of the following
environments could they
NOT survive in?
A. anaerobic chamber
B. intestines of organisms
C. deep soil
D. on the skin of animals
Answers
Bacteria that can't survive in the presence of oxygen are called obligate anaerobes. These organisms lack the enzymes needed to neutralize the toxic byproducts of oxygen metabolism.
As a result, they cannot survive in environments where oxygen is present. An anaerobic chamber is a controlled environment that is completely devoid of oxygen, making it an ideal environment for these bacteria to grow. Deep soil can also be a suitable habitat for anaerobic bacteria, as it provides them with the necessary nutrients and protection from oxygen.
The skin of animals can be colonized by a variety of microorganisms, including anaerobic bacteria. However, the intestines of organisms are not an ideal environment for obligate anaerobes, as the digestive tract is rich in oxygen. Therefore, the correct answer is B - intestines of organisms.
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What hormone controls the change in life stage during metamorphosis?
a. Ecdysteroids
b. Juvenile hormone
c. Prothoracicotropic
d. Hormone Exogenous TH
Question 4 1 pts THe hardening of the new cuticle is called?
Answers
The hormone that controls the change in life stage during metamorphosis is ecdysteroids.
Ecdysteroids, specifically the molting hormone known as ecdysone, play a crucial role in regulating metamorphosis in insects and other arthropods. Metamorphosis is a process by which an organism undergoes a dramatic transformation in its body structure and physiology as it progresses through different life stages, such as from larva to pupa to adult.
During metamorphosis, the levels of ecdysone rise, triggering the molting process and initiating the transition between life stages. The ecdysteroids act as signaling molecules that bind to specific receptors in target tissues, leading to various developmental changes. They regulate the timing and coordination of cell growth, tissue differentiation, and the reorganization of body structures during metamorphosis.
While other hormones, such as juvenile hormone, also play important roles in insect development, ecdysteroids are primarily responsible for driving the major changes associated with metamorphosis. Their precise control and timing ensure the successful transition from one life stage to another, ultimately allowing insects to undergo remarkable transformations as they progress through their life cycle.
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Which option is not a scientific explanation for the origin of life on Earth?
Life originated on Earth's surface in warm, shallow oceans.
Cyanobacteria colonies were brought to Earth in asteroids or comets.
Life originated in hydrothermal vents deep in the oceans.
Organic molecules were brought to Earth in asteroids or comets.
A
C
D
Answers
On the basis of the scientific theories for the origin of life on Earth, the explanation which is not correct is that the colonies of cyanobacteria were brought to Earth in asteroids and comets.
What are the different scientific theories on origin of life?According to the deep-sea vent idea, life may have started at submerged hydrothermal vents that spew out essential components for life, like carbon and hydrogen.
In the deepest parts of the ocean's ocean floor, are hydrothermal vents. These vents release fluid that has been heated to a high temperature by the Earth's core as it rises through the crust and is then discharged at the vents gathering dissolved gases and minerals, including carbon and hydrogen. Then, these molecules might have been concentrated in their rocky crevices, serving as mineral catalysts for important reactions. These vents still support thriving ecosystems today because they are rich in chemical and thermal energy.
The meteorites would've been capable of transporting the molecules to Earth after the creation of nucleobases in space, later serving as the foundation for all genetic basis of life.
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Cholera bacteria causes sever diarrhoea. These bacteria spread rapidly when sewage is not piped away. Why is this?
Answers
Answer:
Because cholera bacteria rapidly multiplies in areas with improper sanitation and untreated water that people can drink.
When people drink this water, they get severe diarrhoea.
Introducing a vascular catheter directly into a vessel without further advancement past the punctured vessel is called __________ vascular catheterization.
Answers
It is called central vascular catheterization
Importance of catheterizationCatheterization is defined as the use of medical devices that can be inserted into the body and used for different medical purposes.
Vascular catheterization is a peripheral catheterization that is used to detect certain upper and lower peripheral extremity conditions.
There are different types of vascular catheterization which include:
Arteriovenous (AV) fistula, Arteriovenous (AV) graft andCentral venous catheter (CVC)Central vascular catheterization involves Introducing a vascular catheter directly into a vessel without further advancement past the punctured vessel.
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in pea plants, the purple allele is sufficient for making purple flowers, even if one of the homologous chromosomes carries the white allele. which of the following statements are true in this case?
Answers
In pea plants, the presence of the purple allele is sufficient to produce purple flowers, even if one of the homologous chromosomes carries the white allele. This is because the purple allele is dominant over the white allele.
In genetics, alleles are alternative forms of a gene that occupy the same position on homologous chromosomes. The interaction between alleles determines the phenotype or physical characteristics of an organism.
In the case of pea plants, the purple allele is dominant over the white allele when it comes to flower color. This means that if an individual has at least one copy of the purple allele, regardless of whether the other copy carries the white allele, the flowers will appear purple.
The dominance relationship between the purple and white alleles can be explained by the molecular mechanisms underlying pigment production. The purple allele encodes a functional enzyme or protein responsible for producing the purple pigment, while the white allele may carry a mutation that disrupts this process, resulting in the absence of pigment and white flower color.
Therefore, even if one of the homologous chromosomes carries the white allele, the presence of the purple allele will override its effect, leading to the expression of purple flowers.
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hair texture is an example of incomplete dominance. a person who is homozygous dominant for the h gene has curly hair. what genotype would someone with wavy hair have?
Answers
In this case, hair texture exhibits incomplete dominance. A person who is homozygous dominant for the H gene has curly hair (HH). Since wavy hair is the result of an intermediate phenotype, the genotype for someone with wavy hair would be heterozygous (Hh).
Incomplete dominance results in the partial expression of both alleles giving intermediate phenotypes.If hair texture is an example of incomplete dominance, then the genotype of a person with wavy hair would be heterozygous (Hh) for the h gene. In this case, the dominant allele (H) results in curly hair and the recessive allele (h) results in straight hair. The wavy hair texture is a result of incomplete dominance where both alleles are expressed, resulting in a blend of curly and straight hair textures.know more about incomplete dominance here
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Which of the following eats only eucalyptus leaves?
Answers
Answer:
Koalas can eat them, but I'm not really sure what the options are when you say the following
Explanation:
Which of the following is an abiotic factor that limits the carrying capacity of animal species?
A. a competing species
B. disease-causing bacteria C. increasing number of predators
D. breathable gases
Answers
Answer:
Should be D. Breathable gases
Explanation:
The carrying capacity of an environment is the maximum population size of a biological species that can be sustained by that specific environment, and abiotic factors are non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.
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You're looking through a microscope at a eukaryotic cell and notice that its genetic material (DNA) is openly floating around the cytosol.
What could be a possible cause for what you're seeing through the microscope?
Choose 1 answer:
(Choice A)
A
The lysosome is damaged.
(Choice B)
B
The nucleus is damaged.
(Choice C)
C
The vacuole is damaged.
(Choice D)
D
There is no cause; genetic material should be floating around the cell in this manner.
Answers
The nucleus is damaged
What does an atom share when it bonds with another atom?
A. Ions
B. protons
C. neutrons
D. electrons
Answers
Which process is unlikely to be carried out by an animal cell?
A. the process of obtaining energy
B.the process of converting sunlight to energy
C.the process of dividing into two cells
D.the process of getting rid of waste
Answers
Answer:
B
Explanation:
Animals derive energy by eating plants or animals and using cellular respiration to make ATP. Plants capture energy from the sun via photosynthesis and make sugar and oxygen. They can then use the sugar to perform cellular respiration to derive energy.
Answer:
C.
Explanation:
As you can see, it is dividing.
Which of the following is the best strategy to control wheat rust?
A. Fungicides to treat affected crops and planting rust-resistant varieties
B. Insulation using green roofs to limit rust
C. Invasive insect species to attack rust
D. Citrus greening to prevent the spread of rust
Answers
Which of these muscle pairs produces opposite
motions of the same body part?
rectus albdominus and obliques
hamstrings and rectus abdominus
quadriceps femoris and hamstrings
gluteus maximus and quadriceps femoris
O
DONE
Answers
Answer: quadriceps femoris and hamstrings
Explanation:
If a litter from a test cross (a crossing with a homozygous recessive, in this case, a fawn pug), produced a litter of 12 fawn puglets and 13 black puglets; what is Bobo Fett's (a black pug) genotype?
Answers
If Bobo Fett were a homozygous dominant (GG), crossing him with a homozygous recessive (gg) would have produced only heterozygous offspring (Gg), making all the puglets black.
On the other hand, if Bobo Fett is heterozygous (Gg), then the crossing with a homozygous recessive (gg) can produce black heterozygous puglets (Gg), and fawn puglets, that are homozygous recessive.
Given that the litter has both colors of puglets, Bobo Fett is heterozygous.
Mitosis can occur in both haploid and diploid cells, but meiosis cannot occur in haploid cells. Why not?.
Answers
Mitosis can occur in both haploid and diploid cells because it is equational division where the number of chromosomes remain the same after division. But meiosis cannot happen in haploid cells because it is reductional division and haploid cells do not have any extra copy of chromosomes to be halved.
Mitosis is the cell division where the number of chromosomes do not change after cell division. It usually happens in the somatic cells of the body. Cancer cells also undergo mitosis
Meiosis is the cell division where the number of chromosomes are halved after cell division. The process of meiosis occurs in two phases: meiosis I and meiosis II. The germ cells of the body undergo meiosis.
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Describe the key steps to making a solution of a certain concentration: (e.g. First, next, etc.)
Answers
Answer:
The key steps to making a solution of a certain concentration are:
1. Determine the desired concentration: The first step in making a solution of a certain concentration is to determine what the desired concentration is. This will depend on the specific application of the solution.
2. Calculate the amount of solute needed: Once you know the desired concentration, you need to calculate the amount of solute (the substance being dissolved) that you need to add to the solvent (the liquid used to dissolve the solute) to achieve the desired concentration. This calculation depends on the molecular weight and purity of the solute.
3. Measure out the solute: After calculating the amount of solute needed, measure out the exact amount of solute required using a laboratory balance or other accurate measuring device.
4. Add the solute to the solvent: Carefully pour the measured solute into the solvent while stirring gently. It is important to dissolve the solute completely in the solvent.
5. Verify the concentration: Once the solute has been completely dissolved in the solvent, verify the final concentration by measuring it using appropriate laboratory instruments such as a spectrophotometer or titration apparatus. If necessary, adjust the concentration by adding more solute or solvent until the desired concentration is achieved.
6. Label and store the solution: Finally, label the solution with its identity, concentration, date of preparation, and any other relevant information. Store the solution according to appropriate guidelines for the particular type of solution, such as refrigeration or storage in a dark location.
Which of the following statements about hormones is true?0000They are secreted into a duct by exocrine glands.They circulate in the bloodstream and affect every tissue in the body.They are secreted by endocrine glands directly into the bloodstream.None of these choices are correct.
Answers
They are secreted by endocrine glands directly into the bloodstream.
The endocrine system is composed by glands that secrete hormones directly into the bloodstream. Those hormones communicate with the organism and affect a high number of processes that maintain its functioning.
A(n) __________ is a section of prokaryotic DNA that contains one or more genes along with a corresponding operator to control transcription.
Answers
Answer:
Operon
Explanation:
The material found inside the cell membrane
but outside the nucleus is called?
Answers
Answer: cytoplasm
Explanation:
After school I got a small cut on my arm. Although I washed it and put on a Band-Aid, the area was red, swollen, and I didn’t feel 100% normal for a few days. I got better and a scab formed, eventually disappearing in a few weeks. What was going on inside my after the cut?
Plzzzzz helpppp
Answers
Answer: Red blood cells help create collagen, which are tough, white fibers that form the foundation for new tissue. The wound starts to fill in with new tissue, called granulation tissue. New skin begins to form over this tissue. As the wound heals, the edges pull inward and the wound gets smaller
Explanation: I hope this is good enough
If a cut disappears after a few weak, and it is just a scab, the blood cell starts to clump together and clots. T cell helps in the infection and then the cell grows and covers the cut.
What is healing?Healing is a process of recovering from any scar or cut or wound. Healing is done by the body and the immune system of the body.
Scars develop as a result of parallel-aligned dermal cells during normal wound healing. However, when a biodegradable scaffold causes a disruption in this alignment and instructs cells to develop in a random orientation, the cells follow the varied differentiation program required for full regeneration.
Therefore, the blood cells begin to congregate and clot if a cut doesn't heal after a few days and is only a scab. T cells aid in infection, and as the cells develop, they cover the wound.
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