Chapter 14 wk 10 study questions.docx - Question 1 of 10...

Question 1 of 10
1.0/ 1.0 Points
Why do purines have to pair with a pyrimidine?

A. Allows DNA to be antiparallel

B. The distance between hydrogen bonds remains constant

C. The distance between the two phophodiester backbones remain constant
Feedback: Correct
Question 2 of 10
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An experiment started with
15
N
15
N DNA. After two generations in
14
N medium, E. coli will have
N
N
14

50%
15
N
14
N and 50%
14
N
14
N

E.
50%
15
N
14
N and 50%
15
N
15
N
Feedback: Correct
Question 3 of 10
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Some scientists have proposed that the earliest forms of life may have existed in an “RNA
World” where RNA was both the genetic material and responsible for enzymatic activity.
Imagine that you have recreated such a life form. What would demonstrate that RNA, but not
protein or DNA, is necessary and sufficient for these functions?
Feedback: Learning Objective: Analyze the process of DNA replication
Question 4 of 10
1.0/ 1.0 Points