Ch 11 Test

Question 0

Two scientists are given credit for discovering the structure of DNA. What is the name of those two scientists?

Answer 0

Watson

Crick

Question 1

What do the letters DNA stand for?

Answer 1

Deoxyribonucleic acid

Question 2

DNA is a polymer, which means that is made up of many repeating single units (monomers). What are the monomers called?

Answer 2

Nucleotides

Question 3

The “backbone” of th DNA molecule is made up of two components, what are these?

Answer 3

Sugar (deoxyribose)

Phosphate

Question 4

Shape of phosphate, sugar

Answer 4

Phosphate: circle
Sugar: pentagon

Question 5

What does a nucleotide look like?

Answer 5

Phosphate, sugar and nitrogen base

Question 6

Wilkins and Franklin studied the structure of DNA using:

Answer 6

X-Ray

Question 7

Any change in the DNA sequence that also changes th protein it codes for

Answer 7

Mutation

Question 8

What happens when mutations occur in reproductive cells?

Answer 8

The altered gene can become part of the offspring
The offspring could not survive
The offspring could have a positive mutation

Question 9

What happens when mutations occur in body cells?

Answer 9

Impaired function of the cells

Possibly cancer

Question 10

A change in a single base pair in the DNA

Answer 10

Point mutation

Question 11

A mutation in which a single base is added or deleted from DNA

Answer 11

Frame shift mutation

Question 12

What can frame shift mutations cause?

Answer 12

Different mRNA and tRNA codons

Different amino acids to form

Question 13

Environmental effect of DNA/genes

Answer 13

Mutagens

Question 14

Examples of mutagens

Answer 14

X Rays
Cosmic rays
Uv light
Nuclear radiation