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 the 2 complementary bases?
A
Adenine and thymine via 2 hydrogen bonds
Guanine and cytosine- via 3 hydrogen bonds
1
Q
What are Adenine and guanine?
A
Double ring base
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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