SB3c DNA Flashcards

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1
Q

adenine

A

Base found in DNA (A)

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2
Q

base

A

Four substances that help make up DNA, often shown by the letters A, C, G and T. Pairs of bases form ‘links’ between two ‘spines’ formed of phosphate groups and a type of sugar.

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3
Q

chromosome

A

A structure found in the nuclei of cells. Each chromosome contains one enormously long DNA molecule packed up with proteins.

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4
Q

complementary base pair

A

Two DNA bases that fit into each other and link by hydrogen bonds. There are two types of complementary base pair: A linking with T, and C linking with G.

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5
Q

cytosine

A

Base found in DNA (C)

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6
Q

DNA

A

Deoxyribonucleic acid. A polymer made of sugar and phosphate groups joined to bases. One molecule of DNA is found in each chromosome.

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7
Q

double helix

A

A structure made of two helices joined together.

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8
Q

gene

A

Section of the long strand of DNA found in a chromosome, which often contains instructions for a protein.

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9
Q

guanine

A

Base found in DNA (G)

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10
Q

hydrogen bond

A

Weak force of attraction caused by differences in the electrical charge on different parts of different molecules.

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11
Q

thymine

A

Base found in DNA (T)

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