DNA 1 Flashcards

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1
Q

What is the structure of DNA like?

A

like a ladder

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2
Q

what are the sides of the ladder made up of

A

alternating phosphate and sugar molecules

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3
Q

what are the steps of the ladder formed by

A

base pairs

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4
Q

4 different bases in DNA

A

Adenine
thymine
cytosine
guanine

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5
Q

what does adenine pair with

A

Thymine

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6
Q

what does cytosine pair with/

A

guanine

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7
Q

what is DNA a type of

A

nucleic acid

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8
Q

DNA

A

deoxyribonucleic acid

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9
Q

where is DNA located

A

inside the nucleus of a cell

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10
Q

how many strands does DNA have?

A

2

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11
Q

where is DNA also found

A

the mitochondria and the chloroplasts have one loop of DNA each

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12
Q

unit of DNA

A

nucleotide

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13
Q

3 components which make up each nucleotide

A

Phosphate
Sugar
base

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14
Q

p

A

phosphate

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15
Q

what is the sugar in DNA

A

deoxyribose

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16
Q

how many carbons in deoxyribose

A

5

17
Q

what type of biomolecule is ribose

A

carbohydrate

18
Q

what type of bases are ATC and G

A

nitrogenous bases

19
Q

2 purine bases

A

Adenine and Guanine

20
Q

2 pyrimidine bases

A

cytosine and thymine

21
Q

what is significant about purines

A

they are single ringed molecules

22
Q

what is significant about pyrimidines

A

they are double ringed molecules

23
Q

Polynucleotide

A

many nucleotides joined together

24
Q

where is the bond between nucleotides located?

A

between the phosphate of one nucleotide and the sugar of the next

25
Q

each base pair has

A

1 purine and 1 pyrimidine

26
Q

what are the forces holding the bases together called?

A

hydrogen bonds

27
Q

A and T form how many hydrogen bonds

A

2 hydrogen bonds

28
Q

C and G form how many hydrogen bonds

A

3 hydrogen bonds

29
Q

who discovered the shape and structure of DNA

A

Watson and Crick

30
Q

what year did W and C discover the shape and structure of DNA

A

1953