Practice questions for Exam III

1. Which of the following is a base pair that would be found in RNA?
   1. G-U
   2. A-U
   3. G-A
   4. G-G
   5. A-T

2. Sickle cell disease is caused by
   1. a mutation in the gene encoding a DNA repair enzyme
   2. a mutation in a gene encoding and enzyme required to break down certain lipids
   3. a mutation in the gene encoding hemoglobin
   4. the conversion of a proto-oncogene to an oncogene
   5. a mutation in a gene encoding a chloride ion transport protein

3. Ribosomes
   1. are part of an RNA molecule
   2. are involved in the process of translation
   3. carry mRNA from the nucleus to the cytoplasm
   4. consist of three subunits
   5. maintain DNA in a compact state

4. Transcription
   1. takes place in the nucleus
   2. produces a protein made up of amino acids
   3. requires tRNA
   4. results in two double-stranded DNA molecules
   5. all of the above

5. The function of the normal p53 gene is
   1. to increase cell growth and division
   2. to make hemoglobin
   3. to limit cell growth and division
   4. to increase protein degradation
   5. to amplify DNA within the genome

6. RNA is composed of
   1. ribose, amino acids, phosphate
   2. deoxyribose, nitrogenous bases, phosphate
   3. deoxyribose, amino acids, phosphate
   4. ribosomes, nitrogenous bases, phosphate
   5. ribose, nitrogenous bases, phosphate

Answers:

1. b
2. c
3. b
4. a
5. c
6. e

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