How many pairs of chromosomes do humans have?

• 46 pairs

• 30 pairs

• 20 pairs

• 23 pairs

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SFS3

What are the nitrogenous bases found in DNA?

• A, T, G, U

• A, T, G, C

• A, T, U, C

• A, G, C, U

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What is the process in which DNA makes a copy of itself?

• DNA Mutation

• DNA Transcription

• DNA Replication

• DNA Translation

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What is the shape of the DNA molecule?

• Spiral

• Double Helix

• Single Helix

• Circle

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Which enzyme is responsible for unzipping the DNA double helix during replication?

• Ligase

• Helicase

• Polymerase

• Nuclease

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In DNA, Adenine bonds with ______________.

• Guanine
• Thymine
• Cytosine
• Adenine

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SFS3

Guanine bonds with ______________.

• Adenine
• Guanine
• Cytosine
• Thymine

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Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for everything a living organism needs

• because we eat it every day for energy

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SFS3

Which 2 molecules forms the sides and backbone of the DNA ladder?

• deoxyribose and adenine
• deoxyribose and a hydrogen bond
• sugar and the nucleus
• deoxyribose (sugar) and phosphate

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What does DNA stand for?

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

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SFS3