Bio110 practice problems chap3 part3

Bio110 practice problems chap3 part3

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  Bio 110 Practiceproblems (Chap 3 Part 3) Answers posted at the bottom of the page. 1. Proteins in biological systems _____. A) store genetic information C) contain genetic material B) link together to form the plasma membrane D) may be enzymes that catalyze reactions 2. The functional groups of amino acids _____. A) are always polar B) may be hydrophobic or hydrophilic C) only contain C, H, and O D) are identical in different types of amino acids 3. Suppose you discovered a new amino acid. Its R-group contains only hydrogen and carbon atoms. Predict the behavior of this amino acid. A) It is hydrophobic. B) It is hydrophilic. C) Relative to the amino acids found in organisms, its interactions with water will be intermediate. D) Relative to the amino acids found in organisms, its interactions with water will be very high. 4. A peptide bond _____. A) forms between the functional groups of different amino acids B) forms between the central carbon and the amino group of a single amino acid C) forms between the carboxyl carbon of an amino acid and the amino group of the next amino acid D) forms between the amino group of an amino acid and the amino group of the next amino acid 5. Which of the following observations shows that proteins must be in a proper configuration in order to function? A) Proteins function best at certain temperatures. B) Proteins have four distinct levels of structure and many functions. C) Enzymes tend to be globular in shape. D) Denatured (unfolded) proteins do not function normally. 6. What type of interaction is directly responsible for the formation of protein secondary structure? A) peptide bonds between adjacent amino acids B) peptide bonds between nonadjacent amino acids C) hydrogen bonds between sections of the polypeptide backbone D) covalent bonds between sections of the polypeptide backbone
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  Bio 110 Practiceproblems (Chap 3 Part 3) 7. The primary structure of a protein is ____. A. composed of two or more polypeptide chains coming together. B. the linear amino acid sequence of the polypeptide chain. C. maintained by hydrogen bonds.
 D. an alpha helix or a pleated sheet. E. interactions among various R-groups within the protein affecting the overall 3-D structure. 8. The secondary structures of a protein is ____. A. composed of two or more polypeptide chains coming together. B. the linear amino acid sequence of the polypeptide chain. C. maintained by hydrogen bonds.
 D. interactions among various R-groups within the protein affecting the overall 3-D structure. E. only complex proteins containing more than one polypeptide chain. 9. The tertiary structure of a polypeptide refers to ____. A. the helical and pleated sheets it forms. B. the linear sequence of the polypeptide chain. C. interactions among various R-groups affecting the overall 3-D structure. D. only complex proteins containing more than one polypeptide chain. 10. The quaternary structure of a protein refers to ____. A. the helical and pleated sheets it forms. B. the linear sequence of the polypeptide chain. C. interactions among various R-groups affecting the overall 3-D structure. D. only complex proteins containing more than one polypeptide chain. 11. All proteins share the same backbone structure, they differ by ____. A. length of backbone and R-groups attached to them. B. phosphodiester bonds joining monomers together. C. glycosidic bonds joining monomers together. D. hydrogen bonds holding them together. 12. Genetic disorders such as sickle cell anemia are errors encoded in the ___ blueprint, which are later translated into or expressed in the ____ of cells, resulting in the disorder in humans. A. DNA; RNA D. DNA; carbohydrate B. protein; DNA E. protein, fat C. DNA; proteins 13. A polypeptide consisting of 100 monomers has ___ peptide bonds linking them together. A. 100 C. 98 B. 99 D. 101
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  Bio 110 Practiceproblems (Chap 3 Part 3) 14. The creation of a protein polymer from monomers results from ____ reactions. A. hydrolysis C. fast B. condensation/dehydration D. slow 15. Identify the R-group in the amino acid on the right, and what is its property? A. A, nonpolar and insoluble in water B. A, polar and soluble in water C. B, nonpolar and insoluble in water D. B, polar and soluble in water E. C, nonpolar and insoluble in water F. D, polar and soluble in water 16. Identify the R-group in the amino acid on the right, and what is its property? A. A, it’s a base B. A, it’s an acid C. A, it’s hydrophobic D. B, it’s a base E. B, it’s an acid F. B, it’s hydrophobic G. C, it’s a base H. C, it’s an acid I. C, it’s hydrophobic 17. In the chemical structure of a protein below, circle the peptide bonds and R-groups.
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  Bio 110 Practiceproblems (Chap 3 Part 3)