3.3 DNA Structure Flashcards Preview

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Flashcards in 3.3 DNA Structure Deck (11):
1

Outline DNA nucleotide structure

A DNA nucleotide is made up of a phosphate group, a deoxyribose sugar, and a nitrogenous base (can be one of four different bases).

2

State the names of the four bases of DNA

Adenine, Guanine, Thymine, Cytosine.

3

State the two purines

Adenine and Guanine

4

State the two pyrimidines

Thymine and Cytosine

5

Outline how DNA nucleotides are linked together into a single strand.

DNA nucleotides are linked together by a covalent bond between the deoxyribose sugar of one nucleotide, and the phosphate group of another.

6

Outline the structure of a double helix

Two anti-parallel polynucleotide chains, held together by hydrogen bonds between the base pairs.

7

State Adenine's base pair

Thymine.

8

State Thymine's base pair

Adenine.

9

State Guanine's base pair

Cytosine.

10

State Cytosine's base pair

Guanine.

11

Explain how a DNA double helix is formed

Formed through complementary base pairings (A+T, C+G). Pair's held together by hydrogen bonds. This forms two polynucleotide chains.