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Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN: 9780134580999
Author: Elaine N. Marieb, Katja N. Hoehn
Publisher: PEARSON
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1. Which best describes the contribution of primary (1’) structure of polypeptides to the native conformation of proteins:
a) Structure that results from intrachain interactions of amino acid side chains
b) Structure that results from interchain interactions of amino acid side chains
c) Structure that results from base pairing
d) Structure that results from the linear sequence of amino acids from beginning to end of molecule.
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- 16.arrow_forward1) If the pH of the rain drops from 6 to 5 due to air pollution, the rain has become: a) two time more acidic b) four-time more acidic c) ten time more acidic d) one thousand times more acidic 2) which of combination of statement is correct ? the denaturation of protein 1- causes changes in tertiary structure 2- is always an irreversible process 3-has no influence on the solubility 4-occurs only by interaction with heavy metals 5-does not influence covalent bonds and hydrogen bonds select one: a) only 1 is correct b) only 1 and 2 are correct c) only 3 and 4 are correct d) only 3, 4 and 5 are correct e) only 1, 2 and 5 are correctarrow_forward1. Amino Acid 1 = W + X = Draw amino acid 1 at a low pH a) As the D Fisher Projection Name of amino acid 1: Isoleucine b) As the S isomer:arrow_forward
- 17.arrow_forwardWhich of the following levels of protein structure can involve covalent bond formation? A) Primary B) Secondary C) Teritary D) Quaternary E) Primary and teritary F) Primary, teritary and quaternaryarrow_forward2. a) State the three components of nucleic acid. b) List the four nitrogenous bases in nucleic acid.arrow_forward
- Which of the following, if any, is correct about protein folding? a)2° structure formation is primarily entropic, 3° structure formation is primarily entropic b)2° structure formation is primarily entropic, 3° structure formation is primarily enthalpic c)2° structure formation is primarily enthalpic, 3° structure formation is primarily entropic d)2° structure formation is primarily enthalpic, 3° structure formation is primarily enthalpic e)None of the abovearrow_forward19. Draw all 20 of the genetically encoded amino acids at (a) pH = 1; (b) pH = 1; (c) pH = 12. Include the charges on all functional groups that have titrated.arrow_forward1) Match the nucleotide pictures to their names. A) Cytosine B) Guanine C) Thymine D) Adeninearrow_forward
- What type of bonds/forces stabilize protein secondary structure? A) ionic (electrostatic) B) hydrogen bonds C) hydrophobic forces D) A and C O E) A, B and Carrow_forward38) A nucleic acid sequence is read from the A) free 3' hydroxyl; free 5' phosphate B) free 3' phosphate; free 5' hydroxyl C) free 5' phosphate; free 3' hydroxyl D) free 5' hydroxyl; free 3' phosphate to thearrow_forwardPeptide bonds cannot rotate. This is because: a) the amino acid side chains are too bulky to allow this. B) Internal hydrogen bonding hinders rotation. C) interaction with water molecules hinders rotation D) the peptide bond has considerable double bond character Polypeptide chains prefer the trans conformation. This is because: a) This distances hydrophilic groups from hydrophobic groups b) this minimizes crowding of side chains c) This brings hydrophilic groups in contact with water molecules d) This allows proteins to fold more easily Ramachandran plots indicate that protein conformation is largely a function of: a) hydrophobicity b) number of amino acids c) torsion angles d) arrangement of prosthetic groupsarrow_forward
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