Intro to Cell & Molecular Biology: Chapter 3 Preparation for Quiz 1

Chapter 3 Reading Quiz Question 6 The secondary structure of proteins results because of _____ bonding between atoms in the protein's backbone. See Section 3.2 (Page 84) . A. hydrogen B. ionic C. covalent D. hydrophobic

A

Chapter 3 Question 3 What type of information is used to direct different polypeptides to fold into different shapes? Select all that apply. A. order of amino acids that make up the polypeptide B. the molecular mass of the polypeptide C. type of amino acids that make up the polypeptide D. the temperature of denaturation of the polypeptide

A, C

Activity: Protein Structure Tertiary structure is NOT directly dependent on _____. A. hydrophobic interactions B. peptide bonds C. ionic bonds D. hydrogen bonds E. bonds between sulfur atoms

B

Activity: Protein Structure The secondary structure of a protein results from _____. A. ionic bonds B. hydrogen bonds C. bonds between sulfur atoms D. hydrophobic interactions E. peptide bonds

B

Chapter 3 Blue Thread Question 6 Nonpolar amino acid residues are typically found in the interior of globular proteins like chymotrypsin (Fig. 3.8d). Which chemical force is most directly responsible? See Section 3.2 (Page 84) . A. Tertiary structure B. Hydrophobic interactions C. Ionic bonding D. Covalent bonding

B

Chapter 3 Reading Quiz Question 3 During protein synthesis, the peptide bond between amino acids is formed by the process of _____. See Section 3.1 (Page 80) . A. ionic bonding B. condensation C. hydrolysis D. hydrogen bonding

B

Chapter 3 Reading Quiz Question 5 The alpha-helix is a component of __________ protein structure. See Section 3.2 (Page 84) . A. primary B. secondary C. tertiary D. quaternary

B

Activity: Protein Structure Proteins are polymers of _____. A. nucleotides B. glycerol C. amino acids D. CH2O units E. hydrocarbons

C

Chapter 3 Blue Thread Question 4 In proteins, secondary, tertiary, and quaternary levels of structure depend on primary structure. Which of the following most accurately lists elements of any protein's primary, secondary, tertiary, and quaternary structure, in that order? See Section 3.2 (Page 84) . A. One polypeptide chain, two polypeptide chains, three polypeptide chains, and more than three polypeptide chains B. Amino acid sequence, hydrogen bonding between R-groups, overall shape of a single polypeptide, and multiple polypeptide subunits C. Amino acid sequence, hydrogen bonding between backbone groups, overall shape of a single polypeptide, and combinations of tertiary structures D. Covalent bonding, van der Waals interactions, hydrogen bonding, and hydrophobic interactions,

C

Chapter 3 Blue Thread Question 5 Most protein enzymes catalyze only one specific chemical reaction effectively. What feature of protein structure is most directly responsible for enzyme-substrate specificity? See Section 3.4 (Page 91) . A. Most protein enzymes have rigid, static structures essential to their specificity. B. The specific geometry and types of nucleotides in the active site C. The specific geometry and types of amino acids in the active site D. The specific geometry and types of amino acids outside the active site

C

Chapter 3 Reading Quiz Question 7 What causes mad cow disease and other such spongiform encephalopathies? See Section 3.3 (Page 89) . A. an unknown toxin found in certain polluted water supplies B. infectious bacteria known as prions C. misfolded proteins known as prions D. infectious viral particles

C

Activity: Making and Breaking Polymers What is another name for a condensation reaction? A. water formation B. hydrolysis C. monomerization D. dehydration E. catabolism

D

Activity: Making and Breaking Polymers What is the name of the process during which a bond between two monomers is broken? A. condensation B. dehydration C. combustion D. hydrolysis

D

Chapter 3 Reading Quiz Question 8 Which of the following is true of protein folding? See Section 3.3 (Page 89) . A. Misfolded proteins can still function correctly. B. Once proteins fold, their structure doesn't change. C. Correct folding is aided by high temperatures. D. Some proteins can fold spontaneously.

D

Activity: Protein Functions Which of these does NOT contain a structural protein? A. muscles B. spider silk C. tendons D. ligaments E. ovalbumin

E

Activity: Protein Structure What type of bond joins the monomers in a protein's primary structure? A. hydrogen B. S - S C. ionic D. hydrophobic E. peptide

E