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IGCSE Biology > Topic 7 - DNA, Genes and Chromosomes (Paper 2) > Flashcards

Topic 7 - DNA, Genes and Chromosomes (Paper 2) Flashcards

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1
Q

what is the structure of DNA?

A

a DNA molecule has two strands coiled together in the shape of a double helix

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2
Q

what are the two strands of DNA held together by?

A

chemicals called bases

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3
Q

what are the four different bases and their pairings?

A

adenine and thymine
cytosine and guanine

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IGCSE Biology (76 decks)

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