Worksheets

Question 1

DNA backbone is made of ( )

Answer 1

Sugar and phosphate

Question 2

four types of bases

Answer 2

Guanine/Cytosine

Adenine/Thymine

Question 3

DNA monomer

Answer 3

1 sugar, 1 phosphate, 1 base

Question 4

Adenine is directly bonded to ( )

Answer 4

Thymine/sugar

Question 5

Each sugar is bonded to ( )

Answer 5

1 base, two phosphates

Question 6

Each phosphate is bonded to ( )

Answer 6

Two sugars

Question 7

There are ( ) of bases in one gene

Answer 7

Thousands

Question 8

When DNA duplicates it splits between the ( ). These halves become the ( ) of each chromosome.

Answer 8

Base pairs, chromatids

Question 9

( ) grabs and inserts new bases during DNA replication.

Answer 9

DNA polymerase

Question 10

Mitosis is the division of the ( ).

Answer 10

Nucleus

Question 11

Within each chromatid is a long ( ) molecule wrapped around packaging proteins.

Answer 11

DNA

Question 12

Chromosomes line up ( ) filed during mitosis.

Answer 12

Single

Question 13

We use mitosis when we ( ).

Answer 13

Grow and repair injury

Question 14

We use meiosis when we ( ).

Answer 14

Make sex cells

Question 15

I’m meiosis I chromosomes line up ( ) field.

Answer 15

Double

Question 16

In meiosis I ( ) of chromosomes are separated. The ( ) are not pulled apart.

Answer 16

Pairs, chromatids