Chapter 2- Biochemistry- DNA Structure Flashcards Preview

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

What are the 2 complementary bases?

Adenine and thymine via 2 hydrogen bonds
Guanine and cytosine- via 3 hydrogen bonds

1

What are Adenine and guanine?

Double ring base

2

What are thymine and cytosine?

Pyrimuianes- single ringed bases

3

What Are DNA nucleotides linked together by?

A covalent bond into single strand

4

How are nucleotides linked into a single strand?

Via a condensation reaction

5

What is the bond between two nucleotides called?
What is also formed when the nucleotides bond together?

Phosphodiester bond
Formation of 1 molecule of water

6

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

The formation of a long single strand

7

What is the double helix held together by?

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

8

Why must bases by facing each other?

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

9

Why do atoms arrange themselves in an optimal energy configuration?

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

Draw simple diagram of molecular structure of DNA

Do it moonie.

11

Draw the outline of DNA nucleotide structure

Do it martha

12

Draw a chain example of a DNA nucleotide structure

Do it mooney

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