30. Which of the following best describes the initiation of transcription? A. St

Question

30. Which of the following best describes the initiation of transcription? A. Start codon is read and methionine of brought by tRNA B. A hairpin in RNA is formed when correct sequence is reached. C. The sigma unit finds the promoter (TATA box) and calls RNA polymerase D. A release factor sits on the E site of the ribosome. 31. Which of the following best describes the termination of translation? A. A stop codon is reached and a release factor sits in the ribosome. B. A hairpin in RNA is formed when termination sequence is reached C. The sigma unit finds the promoter (TATA box) and calls RNA polymerase D. Start codon is read and methionine of brought by tRNA 32. When making complementary DNA (CDNA) which has no introns, which enzyme is used to copy mRNA into DNA? A. RNA polymerase B. DNA ligase C. Reverse transcriptase D. Primase 33. Those who are lactose tolerance as adults are different genetically than those who are lactose intolerant. Which area of their DNA is different? A. promoter C. lactase gene D switch/enhancer B, lac operon 34. How does lactose cause the LacZ and LacY genes to be expressed? A. It binds to operator C. It binds to permease B. It binds to the repressor D. It binds to a switch 35. Which of the following is true about evolution by natural selection? A. The goal of evolution is to arrive at humans. B. when evolution is complete, a perfect species exists C. Heritable traits aid in survival and reproduction D. An individual organism can change its allelic frequencies within its lifetime.

Explanation / Answer

30. C. Sigma factor....

31. A. Stop codon...

32. C. Reverse transcriptase

33. B. Lax operon

34. B. It binds to repressor

35. C. Heritable traits aid in survival

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