DNA Structure & Replication

Which one of the following nitrogen bases would pair in a DNA molecule?

• adenine-guanine
• guanine-cytosine
• adenine-cytosine
• cytosine-uracil

Watson and Crick were the first to suggest that DNA is _____

• a short molecule
• the shape of a double helix
• a protein molecule
• the genetic material

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NGSS.HS-LS1-1

The backbone of a DNA molecule is made of which two components?

• phosphate molecules and ribose sugars
• deoxyphosphate molecules and ribose sugars
• phosphate molecules and deoxyribose sugars
• deoxyphosphate molecules and deoxyribose sugars

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NGSS.HS-LS1-1

The process by which a DNA molecule is copied is called _____.

• binary fission
• mitosis
• replication
• translation

Which sequence of DNA bases would pair with this partial strand of DNA: ATG TGA CAG

• ATG TGA CAG
• TAC ACT GTC
• GTA AGT GAC
• CAT TCA CTG

The genetic material of an organism is composed of

• lipids
• proteins
• Deoxyribonucleic acid
• complex carbohydrates

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NGSS.HS-LS1-1

NGSS.HS-LS3-1

DNA contains the code for constructing which molecules?

• proteins
• starches
• fats
• sugars

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NGSS.HS-LS1-1

Which of the following best describes a DNA molecule?

• double helix
• contains ribose
• made of amino acids
• contains Uracil

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NGSS.HS-LS1-1

In a molecule of double-stranded DNA, the amount of Adenine present is always equal to the amount of

• cytosine
• guanine
• thymine
• uracil

Why is DNA important?

• it is very small and very complicated
• it's in everything
• it serves as the blueprint for traits of all living things
• because we eat it every day for energy

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NGSS.HS-LS1-1

NGSS.HS-LS3-1