Chapter 1
Multiple Choice Format
1. In the experiment showing that DNA is the genetic material of bacteria, heat-killed S Pneumococcus cells A. transformed live R Pneumococcus. B. killed mice injected with them. C. were made alive again. D. killed R Pneumococcus. E. transformed type II cells to type III cells.
Answer: A
2. The genetic material of a cell or virus A. is always DNA. B. is always a nucleic acid. C. directly influences the development of organismal traits. D. is transcribed to RNA that is always subsequently translated to a polypeptide. E. can always be replicated by enzymes produced within that cell or virus.
Answer: B
3. Which of the following is not a possible component of a DNA nucleotide? A. adenine B. deoxyribose C. cytosine D. phosphate E. uracil
Answer: E
4. The 1958 Meselson-–Stahl experiment showed that DNA A. consists of two antiparallel strands. B. is replicated semidiscontinuously. C. is replicated semiconservatively. D. contains nitrogen. E. is replicated by DNA polymerase.
Answer: C
5. In which of the following situations does base pairing occur? A. Between between complementary DNA and RNA strands B. Between between separate complementary DNA strands C. Between between complementary portions of a single RNA strand D. Between between separate complementary RNA strands E. Base pairing in vivo may occur in all of these situations.
Answer: E
6. Insertion/deletion mutations cannot result from A. deamination of cytosine. B. replication error. C. the action of transposable elements. D. recombination error. E. the action of acridines.
Answer: A
7. The major