Chapter 8 Questions

Question 1

What was the transforming principle?

Answer 1

It discovered that since DNase destroyed the transforming substance, the transforming substance was DNA.

Question 2

Who demonstrated that DNA carried genetic information?

Answer 2

Hershey and Chase.

Question 3

How is the nitrogenous base linked to the 1’ carbon atom of the sugar?

Answer 3

Through a covalent bond.

Question 4

How are polynucleotide strands connected?

Answer 4

Covalent, phosphodiester bonds.

Question 5

What is on the outside and inside of the double helix?

Answer 5

The sugar phosphate linkages are on the outside and the bases are stacked in the interior.

Question 6

How many H bonds does C and G have?

Answer 6

3

Question 7

How does Z DNA differ from B DNA?

Answer 7

Z DNA forms a left handed helix.

Question 8

What is the nucleosome made up of?

Answer 8

Two copies of each H2A, H2B, H3 and H4 histone proteins.

Question 9

What are the characteristics of DNA sequences on telomeres?

Answer 9

One strand consists of G, A and T nucleotides, they consist of repeated sequences and one strand protrudes beyond the other, creating single stranded DNA at the end.