Review: DNA Structure and Nucleotides

Which of the following describes the shape of a DNA molecule?

• double helix

• sphere

• pyramid

• rectangle

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What does DNA stand for?

• Deoxyribonucleic acid
• Denitrogenous acid
• Deribonucleic acid
• Diribonucleic acid

Name this structure

• double helix

• nucelotide

• twisted ladder

• hydrogen bond

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Which organelle is DNA usually found in?

• cell membrane
• vacuole
• ribosome
• nucleus

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The letters of the DNA alphabet are:

• A, C, G and T

• A, O, G, and T

• C, G, P and T

• C, G, T and D

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Why is DNA important?

• It gives each cell instructions on how to do its job.

• It is what the cell membrane is made of.

• It helps the cell use water.

• It is food for the cell.

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In the DNA alphabet, T always pairs with:

• A

• T

• G

• C

In the DNA alphabet, C always pairs with:

• A

• C

• T

• G

How does DNA spell out different instructions?

• By having a double or triple helix

• Adding more phosphate

• Different combinations of letters from the DNA alphabet

• Adding more sugar

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A group of three letters on DNA is called a:

• Helix

• Sugar

• Phosphate

• Codon

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