Chapter 2- Biochemistry- DNA Structure Flashcards Preview

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Flashcards in Chapter 2- Biochemistry- DNA Structure Deck (13)
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0
Q

What are Adenine and guanine?

A

Double ring base

1
Q

What are the 2 complementary bases?

A

Adenine and thymine via 2 hydrogen bonds

Guanine and cytosine- via 3 hydrogen bonds

2
Q

What are thymine and cytosine?

A

Pyrimuianes- single ringed bases

3
Q

What Are DNA nucleotides linked together by?

A

A covalent bond into single strand

4
Q

How are nucleotides linked into a single strand?

A

Via a condensation reaction

5
Q

What is the bond between two nucleotides called?

What is also formed when the nucleotides bond together?

A

Phosphodiester bond

Formation of 1 molecule of water

6
Q

The successive condensation reaction of a nucleotide strand can result in what?

A

The formation of a long single strand

7
Q

What is the double helix held together by?

A

2 polynucleotide chains of DNA are held together by hydrogen bonds between complimentary base pairs

8
Q

Why must bases by facing each other?

A

To be able to pair, the 2 strands must run in opposite directions (anti-parallel)

9
Q

Why do atoms arrange themselves in an optimal energy configuration?

A

This position of least resistance results in the double stranded DNA twisting to form a double helix with approx. 10-15 bases per twist

10
Q

Draw simple diagram of molecular structure of DNA

A

Do it moonie.

11
Q

Draw the outline of DNA nucleotide structure

A

Do it martha

12
Q

Draw a chain example of a DNA nucleotide structure

A

Do it mooney

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