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1

DNA backbone is made of ( )

Sugar and phosphate

2

four types of bases

Guanine/Cytosine
Adenine/Thymine

3

DNA monomer

1 sugar, 1 phosphate, 1 base

4

Adenine is directly bonded to ( )

Thymine/sugar

5

Each sugar is bonded to ( )

1 base, two phosphates

6

Each phosphate is bonded to ( )

Two sugars

7

There are ( ) of bases in one gene

Thousands

8

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

Base pairs, chromatids

9

( ) grabs and inserts new bases during DNA replication.

DNA polymerase

10

Mitosis is the division of the ( ).

Nucleus

11

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

DNA

12

Chromosomes line up ( ) filed during mitosis.

Single

13

We use mitosis when we ( ).

Grow and repair injury

14

We use meiosis when we ( ).

Make sex cells

15

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

Double

16

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

Pairs, chromatids