Y9 - DNA STRUCTURE AND BASE PARING - BIOLOGY

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Last updated 4:38 PM on 10/14/26
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14 Terms

1
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What does DNA stand for?
Deoxyribonucleic acid.
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What is the main role of DNA?
It carries the genetic code used to make proteins.
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What is the shape of a DNA molecule?
A double helix: two strands twisted together.
4
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How many different bases are found in DNA?
Four.
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Name the four bases in DNA.
Adenine (A), thymine (T), cytosine (C) and guanine (G).
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What are the complementary DNA base-pairing rules?
Adenine pairs with thymine (A–T); cytosine pairs with guanine (C–G).
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What does complementary mean in DNA?
Each base pairs with its specific matching base.
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What is a DNA nucleotide?
A DNA building block made of sugar, phosphate and a base.
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What are the monomers of DNA?
Nucleotides.
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What forms the backbone of DNA?
Alternating sugar and phosphate groups.
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What information do DNA bases carry?
The genetic code.
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What connects the two strands of DNA?
Complementary base pairs.
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Which base pairs with adenine in DNA?
Thymine.
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Which base pairs with cytosine in DNA?
Guanine