Chapter 14

Question 1

Griffith in the 1920’s concluded that

Answer 1

virulence could pass from killed streptococcus strains into live strains

Question 2

Avery, Macleod, And Mccarty in the 1940’s concluded that

Answer 2

transformation of material is most likely DNA

Question 3

Hershey and Chase in the 1950’s investigated

Answer 3

bacteriophages

Question 4

bacteriophages are composed of only

Answer 4

DNA and protein

Question 5

Bacteriophage DNA was labled with

Answer 5

radioactive phosphorus (32 P)

Question 6

Bacteriophage Protein was labled with

Answer 6

radioactive sulfur (35 S)

Question 7

DNA structure is a

Answer 7

ribonucleic acid

Question 8

Building blocks of DNA are

Answer 8

nucleotides

Question 9

Each nucleotide in DNA is composed of what 3 things

Answer 9

5 carbon sugar, phosphate group, and a nitrogen base

Question 10

A nitrogen base consists of what 4 elements

Answer 10

Adenine, Thymine, Cytosine, and Guanine

Question 11

Nucleotide’s are polymerized to form what

Answer 11

nucleic acids

Question 12

Amount of adenine equals what

Answer 12

amount of thymine

Question 13

Amount of cystine equals what

Answer 13

amount of guanine

Question 14

Rosalind and Maurice concluded 3 things

Answer 14

1. DNA is helical
2. Its diameter is 2 NM
3. It makes a complete turn every 3.4NM

Question 15

James Watson and Francis Clerk in 1953 deduced ___ ___, and proposed what

Answer 15

DNA structure, and proposed a double helix structure

Question 16

A double helix includes 2…

Answer 16

sugar phosphate backbones