Unit 3 - Biology l

What scientist(s) follow the description: Studied bacteriophages which are viruses that infect bacteria.

-Labeled viruses with radioactive elements.

-Found radioactive phosphorus inside the bacteria.

• Griffith

• Avery

• Hershey and Chase

What scientist(s) follow the description: Worked with pneumonia bacteria.

-Two types: R (not deadly) and S (deadly)

-Experimented with mice

• Griffith

• Avery

• Hershey and Chase

What scientist(s) follow the description: Isolated and studied the transforming principle through a series of tests.

• Griffith

• Avery

• Hershey and Chase

Below is a DNA sequence from one side of a strand of DNA. Write the other side of the strand in the blank.

ACGTACTGATTCCAA

(a)  

What bases pair together? A space is a different base pair.

(a)  

How many hydrogen bonds are between each base pair?

• 1

• 2

• 3

• 4

DNA from any organisms should have the same percentages of guanine as cytosine and the same percentage of adenine as thymine. Whose rule is this?

(a)  

2 rings of Purines which are guanine and adenine, 1 ring of pyrimidines which are cytosine and thymine. What does the information hold together?

(a)  

Which of the following is not a structure of DNA?

• Double helix

• Double bond.

• A-T and G-C

• Read 5' to 3'

There are 4 different nucleotides. It is necessary because each nucleotide is a _?_ of DNA.

(a)