Germline mutations will ultimately result in... a. DNA mutations that will be pr

Question

Germline mutations will ultimately result in... a. DNA mutations that will be present in a limited number of cells. b. DNA mutations that will be present in all cells. c. DNA mutations that will only be present in the zygote. Which component is not directly involved in translation? a. mRNA b. DNA c. tRNA d. Ribosomes An RNA primer is required to initiate DNA replication because it provides a a. 5' OH (hydroxyl) for DNA Polymerase. b. 3'OH (hydroxyl) for DNA Polymerase. c. 2' OH (hydroxyl) for DNA Polymerase. d. I' OH (hydroxyl) for DBA Polymerase. Protoncogenes a. are present only in people who develop cancer. b. that undergo mutation(s) have a relationship to stemming cancer risk. c. are present in every one and when mutated can become oncogenes. Use this "non-mutated" mRNA sequence 5'CCCGGGUACAAA3' as a reference to answer questions 36 and 37. See genetic code on last page. Which of the following would reflect a mutation that occurred and resulted in a missense mutation. a. 5'CCCGGCUACAAA3' b. 5'CCCGGGIACAAG3' c. 5'CCGGGGUACAAA3' d. 5'CCCGGGUACAAU3' Which of the following would reflect a mutation that occurred and resulted in a nonsense mutation. a. 5'CCCGGCUACAAA3' b 5'CCCGGGUAGAAA3' c. 5'CCGGGGUACAAA3' d. 5'CCCGGGUACAAU3'

Explanation / Answer

32b these mutations are present in all cells of the offspring as they are all formed from the germ cells and the mutations thus exist in all the cells .

33b DNA is not directly involved in translation. It forms the mRNA.

34 b the synthesis of DNA occurs in 5-3 direction and hence the 3 oh of primer is available to the polymerase for elongation

35 c These genes code for proteins that help regulate cell growth. A change in the DNA sequence of the proto-oncogene gives rise to an oncogene, which produces a different protein and interferes with normal cell regulation.

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