Chapter 7 Part 1

DNA is: (1 of 2)

• denatured nucleotide acid.

• passed from offspring to parents.

• the hereditary molecule of life.

• the most unreliable type of criminal evidence.

• all of these.

Fill in the blank: DNA is the _______ molecule of life.

• hereditary

• denatured

• unreliable

• criminal

Fill in the blank: The backbone of a DNA molecule is composed of _______ and _______.

• nucleotide bases and sugars

• phosphates and sugars

• nucleotide bases and phosphates

• sugars and nucleotide bases

If one strand of DNA reads A T T A C G C C, what will the complementary strand read?

• A. A T T A C G C C

• B. C G G C A T A A

• C. G C C G T A T T

• D. T A A T G C G G

Using the labels, identify the parts of a DNA molecule.

c

d

e

f

b

a

Nitrogen Base

Base pair

Hydrogen bond

Nucleotide

Deoxyribose

Phosphate

Which arrow is pointing to the nitrogenous base?