Which of the following are features of proteins? -they are generally circular molecules. -they are made up of 20 different amino acids. -their synthesis involves the participation of several distinct types of RNA molecule. -unlike DNA, protein never forms a helical structure. -during protein synthesis, the growing chains are extended at the N-terminus More than one answer can be right

Which of the following are features of proteins? -they are generally circular molecules. -they are made up of 20 different amino acids. -their synthesis involves the participation of several distinct types of RNA molecule. -unlike DNA, protein never forms a helical structure. -during protein synthesis, the growing chains are extended at the N-terminus More than one answer can be right

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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Which of the following are features of proteins? -they are generally circular molecules. -they are made up of 20 different amino acids. -their synthesis involves the participation of several distinct types of RNA molecule. -unlike DNA, protein never forms a helical structure. -during protein synthesis, the growing chains are extended at the N-terminus More than one answer can be right I am confused please help
Which of the following statements about alpha-helix and beta-sheet structure are true? More than one answer is correct. -they are aspects of protein secondary structure. -they are maintained by hydrogen-bonding interactions within the polypeptide backbone. -most proteins fall into one of two categories: those composed entirely of alpha-helix, and those composed entirely of beta-sheet. -in both alpha-helix and beta-sheet, each amino acid (at position n) interacts with another amino acid at position n+4. -alpha-helix contains only hydrophobic amino acids, while beta-sheet contains only hydrophilic amino acids. More than one answer is correct I am confused
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
At what level of protein structure (primary, secondary, tertiary, or quaternary) will protein structure be initially altered? Heating a protein (due to fever), causing hydrogen bonds to break. Drastic changes in pH (like the above patients), causing some polar amino acids to turn into non-polar amino acids
A mutation leads to a change in amino acid from valine, an amino acid with a nonpolar side chain, to aspartic acid, an amino acid with a polar, negatively-charged side chain. Do you think that the following levels of protein structure change? If so, how and why? If not, why not? Please frame your answer in terms of chemical bonds and interactions. (primary structure, secondary structure, tertiary structure, quartenary structure)
Which of the following statements is CORRECT? O Any protein attached to any sugar side chain is a proteoglycan. O Any hyaluronan is a proteoglycan. O Any protein attached to any glycosaminoglycan is a proteoglycan. O Any glycosaminoglycan is a proteoglycan.
Which of the following best describes how the secondary structure of a protein is formed? A B с D O=U a-helix H O=C N-H R-C-H C=0 H-N H-C-R O=C N-H R-C-H C=O H-N O-C N-H R-C-H C=O H-N N-H 0= H-C-R H-N C=O R-C-4 N-H O=C H-C-R 4-1 Ç=O R-C-H N-H 0=C H-C-R (=O R-C-H B-pleated sheet ionic bonds between the R groups of the polypeptide amino acids -Uh hydrogen bonds between the carboxyl and amino groups of non-adjacent amino acids covalent bonds between the carboxyl and amino groups of adjacent amino acids hydrogen bonds between the R groups of the polypeptide amino acids
Which of the following levels of protein architecture is least likely affected by changes in pH? O Secondary Structure Quaternary Structure O Tertiary Structure O Primary Structure
Which of the following statements differentiates structurally albumin (a globular protein) structurally with that of collagen (fibrous protein)? O Peptide bonds in collagen are rigid and fixed, while the peptide bonds in albumin can freely rotate O Collagen possess an elongated shape while albumin resemble a spherical shape The amino acids in albumin are in the L-form while the amino acids in collagen are in the D-form Albumin possess less diverse set of amino acids while collagen can contain a variety of amino acid types
Hydrogen bonds that form a helices and B-pleated sheets are the primary interaction in which level of protein structure? O secondary O quaternary O primary O tertiary
Protein structures have several different levels of organization. In the space below indicate the type of molecular bonds that can contribute to each level of organization: primary- secondary- tertiary- quarternary-
Which of the following peptides will likely adopt an alpha helix structure? (idk) A-D-I-E-L-Y-F-H-I-C-V-D A-R-E-P-H-Y-D-P-C-Q-S A-D-I-E-L-Y-M-H-I-C-V-D A-R-E-V-H-Y-I-D-C-Q-F