CB3bi DNA Flashcards

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1
Q

The four bases in DNA: a________

A

adenine

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2
Q

The four bases in DNA: c_______

A

cytosine

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3
Q

The four bases in DNA: t_______

A

Thymine

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4
Q

The four bases in DNA: g______

A

Guanine

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5
Q

Each base is attached to a…

A

sugar

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6
Q

Each sugar is attached to a….

A

phosphate group

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7
Q

The sugar and phosphate groups form…

A

the backboneof DNA strands

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8
Q

DNA is made of units joined in a chain, and so it is a…

A

polymer

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9
Q

A molecule of DNA contains two strands, each of which form a ship called a helix. The strands are held together by substances called bases, to form a…

A

Double helix

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10
Q

Complementary base pairs

A

Two DNA bases that fit into each other and link by hydrogen bonds

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11
Q

Describe the shape of a DNA molecule

A

A DNA molecule is tgithly coiled and forms the shape of a double helix

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12
Q

Cytosine and guanine form how many hydrogen bonds between them?

A

3

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13
Q

A slightly negative charged part of one base attracts…

A

A slightly positively charged part of another base

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14
Q

Adenine and Thymine form how many hydrogen bonds?

A

2

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15
Q

The order of bases in a gene contains the

A

coded instructions for a protein

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16
Q

We all have slight differences in our genes caused by

A

slightly different orders of bases in our DNA

17
Q

Everyone except has different DNA except

A

Identical twins