Chapter 2 An Introduction to Genes and Genomes

Chapter 2   An Introduction to Genes and Genomes

Complete Chapter Questions With Answers

Sample Questions Are Posted Below

1) The complementary base that hydrogen bonds with thymine in a DNA double helix is ________.

1. A) uracil
2. B) thymine
3. C) guanine
4. D) adenine
5. E) cytosine

Answer:  D

2) Which of the following is a structural feature of DNA but not RNA?

1. A) Single-stranded
2. B) Containing the nitrogenous base adenine
3. C) Containing phosphate groups
4. D) Containing deoxyribose sugars
5. E) Containing the nitrogenous base uracil

Answer:  D

3) Which type of base-pair substitution mutation has no effect on the amino acid sequence of a protein?

1. A) Missense mutation
2. B) Nonsense mutation
3. C) Silent mutation
4. D) Frameshift mutation
5. E) None of these choices

Answer:  C

4) Which of the following is a characteristic of smooth endoplasmic reticulum (SER) but not rough endoplasmic reticulum (RER)?

1. A) Protein synthesis
2. B) Sending vesicles to the Golgi that contain proteins that are either secreted or become part of the plasma membrane
3. C) Steroid synthesis
4. D) Drug and alcohol detoxification
5. E) Steroid synthesis and drug and alcohol detoxification

Answer:  E

5) Which of the following enzymes is a component of the large ribosomal subunit and catalyzes the formation of peptide bonds between an amino acid attached to a peptidyl-tRNA and an amino acid from an aminoacyl-tRNA?

1. A) Reverse transcriptase
2. B) DNA polymerase
3. C) Peptidyl transferase
4. D) DNA ligase
5. E) β-galactosidase

Answer:  C