3.3 DNA Structure Flashcards Preview

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Flashcards in 3.3 DNA Structure Deck (13):
1

What are nucleic acids made of?

nucleotides

2

What are the 3 nucleotides?

pentose sugar, phosphate, nitrogen base

3

What are the pentose sugar in DNA?

ribose or deoxyribose

4

What are the nitrogenous bases?

adenine, thymine, cytosine, guanine

5

What are the purines?

adenine, guanine

6

What are the pyrimidines?

cytosine, thymine, and uracil

7

What are purines?

two carbon nitrogen ring bases

8

What are pyrimidines?

one carbon nitrogen ring bases

9

Which nitrogenous bases bond?

adenine and thymine, guanine and cytosine

10

What and how many bonds between adenine and thymine?

2 hydrogen bonds

11

What and how many bonds between guanine and cytosine?

3 hydrogen bonds

12

What is the structure of DNA?

double helix with backbone composed of alternating sugars and phosphates, anti-parallel

13

How is DNA joined?

The phosphate group (attached to the 5'-C of the sugar) joins with the hydroxyl (OH) group attached to the 3'-C of the sugar

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