Unit 3: DNA Flashcards

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1
Q

Type of molecule DNA is an example of?

A

Nucleic Acid

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2
Q

Building blocks of a DNA molecule

A

nucleotide

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3
Q

What type of bonds hold the two nitrogenous bases together?

A

Hydrogen Bonds

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4
Q

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

A

helicase

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5
Q

What are the three phases of DNA replication?

A

Initiation

Elongation

Termination

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6
Q

The “steps” of a DNA molecule is made up of???

A

two complementary nitrogen bases held together by hydrogen bonds

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7
Q

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

A

alternating sugar and phosphates

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8
Q

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

A

DNA polymerase

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9
Q

Which nitrogenous base is complementary to Thymine?

A

Adenine

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10
Q

What are the 4 bases of DNA?

A

Adenine

Cytosine

Guanine

Thymine

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11
Q

Describe the DNA molecules at the conclusion of DNA replication?

A

Each DNA molecule is half old and half new.

(semiconservative model)

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12
Q

During which phase of the cell cylce does DNA copy?

A

S phase of interphase

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13
Q

Which nitrogenous base is complementary to Guanine?

A

Cytosine

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14
Q

Which enzyme untwists and unzips the DNA?

A

Helicase

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15
Q

Which nitrogenous base is complementary to Adenine?

A

Thymine

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16
Q

Which nitrogenous base is complementary to Cytosine?

A

Guanine

17
Q

What shape is DNA?

A

Double Helix

18
Q

What does DNA stand for?

A

Deoxyribonucleic Acid

19
Q

What process synthesizes DNA?

A

DNA replication

20
Q

Where is DNA located within the cell

A

Nucleus

21
Q

Type of sugar found in DNA

A

deoxyribose