Ch. 16 Molecular Basis of Inheritance

Question 1

What is the basis for the difference in how the leading and lagging strands of DNA molecules are synthesized?

Answer 1

DNA polymerase can join new nucleotides only to the 3’ end of a growing strand.

Question 2

In analyzing the number of different bases in a DNA sample, which result would be consistent with the base-pairing rules?

Answer 2

A+G=C+T

Question 3

Cytosine makes up 42% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?
Group of answer choices

Answer 3

8%

Question 4

Which of the following statements describes the eukaryotic chromosome?

Answer 4

It consists of a single linear molecule of double-stranded DNA plus proteins.

Question 5

It became apparent to Watson and Crick after completion of their model that the DNA molecule could carry a vast amount of hereditary information in which of the following?

Answer 5

sequence of bases

Question 6

Suppose you are provided with an actively dividing culture of E. coli bacteria to which radioactive thymine has been added. What would happen if a cell replicated once in the presence of this radioactive base?

Answer 6

DNA in both daughter cells would be radioactive.

Question 7

In chromosomes, the DNA is wrapped around

Answer 7

Histones

Question 8

In his work with pneumonia-causing bacteria and mice, Griffith found that

Answer 8

some substance from pathogenic cells was transferred to nonpathogenic cells, making them pathogenic.

Question 9

Which of the following would you expect of a eukaryote lacking telomerase?

Answer 9

a reduction in chromosome length in gametes

Question 10

How do we describe transformation in bacteria?

Answer 10

assimilation of external DNA into a cell