Unit 3: DNA Flashcards Preview

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Flashcards in Unit 3: DNA Deck (21):
1

Type of molecule DNA is an example of?

Nucleic Acid

2

Building blocks of a DNA molecule

nucleotide

3

What type of bonds hold the two nitrogenous bases together?

Hydrogen Bonds

4

What enzyme put the DNA molecules back into the double helix shape during termination?

helicase

5

What are the three phases of DNA replication?

Initiation

Elongation

Termination

6

The "steps" of a DNA molecule is made up of???

two complementary nitrogen bases held together by hydrogen bonds

7

The sides of a DNA molecule composed of????

alternating sugar and phosphates

8

Which enzyme uses the template to add a second strand of DNA during Elongation?

DNA polymerase

9

Which nitrogenous base is complementary to Thymine?

Adenine

10

What are the 4 bases of DNA?

Adenine

Cytosine

Guanine

Thymine

11

Describe the DNA molecules at the conclusion of DNA replication?

Each DNA molecule is half old and half new.  

(semiconservative model)

12

During which phase of the cell cylce does DNA copy?

S phase of interphase

13

Which nitrogenous base is complementary to Guanine?

Cytosine

14

Which enzyme untwists and unzips the DNA?

Helicase

15

Which nitrogenous base is complementary to Adenine?

Thymine

16

Which nitrogenous base is complementary to Cytosine?

Guanine

17

What shape is DNA?

Double Helix

18

What does DNA stand for?

Deoxyribonucleic Acid

19

What process synthesizes DNA?

DNA replication

20

Where is DNA located within the cell

Nucleus

21

Type of sugar found in DNA

deoxyribose