hich of the following is correct about the structure of proteins? a- the number of peptide bonds is equivalent to the number of amino acid residues b- the secondary structure of proteins are mostly stabilized by hydrophobic interactions c- protiens mostly composed of polar amino acids will have an elongated (fibrous) tertiary structure d- the quaternary structure of a protein is formed between or among similar polypeptides only

hich of the following is correct about the structure of proteins? a- the number of peptide bonds is equivalent to the number of amino acid residues b- the secondary structure of proteins are mostly stabilized by hydrophobic interactions c- protiens mostly composed of polar amino acids will have an elongated (fibrous) tertiary structure d- the quaternary structure of a protein is formed between or among similar polypeptides only

Biology (MindTap Course List)

11th Edition

ISBN:9781337392938

Author:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Publisher:Eldra Solomon, Charles Martin, Diana W. Martin, Linda R. Berg

Chapter3: The Chemistry Of Life: Organic Compounds

Section: Chapter Questions

Problem 9TYU: Which of the following levels of protein structure may be affected by hydrogen bonding? (a) primary...

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Describe the four levels of protein structure. How do a proteins side groups influence its interactions with other substances? What happens when a protein is denatured?
Which of the following statements about protein structure is CORRECT O a. Fibrous proteins can have rigid quaternary structure O b. The stability of the quaternary structure in proteins is mainly a result of covalent bonds among the subunits O c. The denaturation of proteins always leads to irreversible loss of secondary and tertiary structure d. The information required for the correct folding of a protein is contained in the specific sequence of amino acids along the polypeptide chain O e. The formation of a disulfide bond in a protein requires that the two participating cysteine residues be adjacent to each other in the primary sequence of the protein
Select the true statements about protein secondary structure. In an a-helix, the side chains are located on the outside of the helix. The secondary level of protein structure refers to the spatial arrangements of short segments of the protein. In a B-pleated sheet, the side chains are located between adjacent segments. Peptide bonds stabilize secondary structure. The x-helix is held together by hydrogen bonds between the amide N-H and C=O groups. Incorrect
Protein structure is directly related to function. Which of the following statements is true regarding this concept ? Polypeptide backbone -CH2 – CH, – CH2- CH2- NH3 0-c- CH - CH2 lonic bond Hydrogen ! bond C- NH2 Disulfide linkage CH CH2 HạC CH3 CH3 H3C CH -CH2 Hydrophobic interactions A. The primary structure consists of the DNA sequence. The secondary and tertiary structures are dependent on interactions between the DNA and RNA polymerase. Mutations resulting in changes one or more bases has the potential to destroy the structure, and therefore the function, of the protein. B. The primary structure consists of the amino acid sequence. The secondary and tertiary structures are dependent on interactions between the amino acid side chains. Mutations resulting in changes one or more amino acids has the potential to destroy the structure, and therefore the function, of the protein. C. The primary structure consists of the DNA sequence. The secondary structure consists of the amino acid…
ch one of the following statements about protein structure is NOT correct? . Domains are discrete parts of a protein structure, usually associated with a particula function. true Beta-sheets are stabilised by hydrogen bonds between amino-hydrogens and carbonyl-oxygens from peptide bonds. no adjacent hydrogen bonding Proteins made from three polypeptide chains show quaternary structure. Yes Smaller protein domains come together to from supersecondary structures and mo
Which statement about quaternary structure is TRUE? Quaternary structure is unaffected by acids or heat. Quaternary structure is determined by the same interaction that holds an α-helix together. Quaternary structure is how prosthetic groups are held in a protein. Quaternary structure is the position of subunits in the overall structure of a protein. All proteins have quaternary structure
Determine whether the following statements describing protein structures is correct or incorrect. CORRECT INCORRECT Proteins in a primary structure consist of a simple polypeptide chain. Interactions between the R groups in amino acids form tertiary structure. Secondary structures are formed by multiple polypeptide chains The two types of secondary structures are the alpha and beta pleated sheets
Match the following levels of protein structure with their description two or more polypeptide chains > > twisting and folding to form a 3-dimensional structure, dependent on the locations of the charged groups and polar groups within the amino acid chain, sometimes covalent bonds form between sulfur atoms (called disulfide bonds) alpha helix and beta- pleated sheets formed by the arrangement of hydrogen bonds between amino acids, many other shapes are possible amino acid sequence 1. quaternary 2. tertiary 3. primary 4. secondary
The following is an example of which level of protein structure? What bonds form this level of structure? Asp-Met-Leu-Trp-Gly-Asn-Lys
Which of the following constitutes the primary structure of a protein? O the folding of a polypeptide chain the polypeptide chains stacked on top of each other O the linear sequence of amino acids in a polypeptide chain several polypeptide subunits
You put albumin, the protein responsible for lipid transport through the blood, in methane, a hydrophobic solution. Would you expect albumin to still be functional? Yes the protein would still be functional because its primary structure remains intact Yes the protein would still be functional because it is used to carry lipids No the protein would not be functional because the peptide bonds would be dehydrated No the protein would not be functional because covalent bonds weaken and disrupt secondary structure No the protein would not be functional because the tertiary structure would change to maximize hydrophobic interactions
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