What is the basic structural unit of DNA?

• Amino acid

• Nucleotide

• Protein

• Lipid

Which of the following components is NOT part of a nucleotide of DNA?

• Phosphate group

• Ribose sugar

• Nitrogenous base

• Deoxyribose sugar

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NGSS.HS-LS1-1

Describe the shape of the DNA molecule.

• Single helix

• Double helix

• Triple helix

• Linear strand

Which nitrogenous base pairs with adenine in DNA?

• Cytosine

• Guanine

• Thymine

• Uracil

Explain why the double helix structure of DNA is important for its function.

• It allows DNA to be easily replicated.

• It makes DNA more stable.

• It enables DNA to store genetic information efficiently.

• All of the above

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NGSS.HS-LS1-1

Identify the sugar component found in the backbone of DNA.

• Ribose

• Glucose

• Deoxyribose

• Fructose

How do the base pairing rules contribute to the DNA replication process?

• They ensure that each new DNA molecule is identical to the original.

• They allow for the formation of RNA.

• They prevent mutations from occurring.

• They help in protein synthesis.

Which of the following statements best describes the function of DNA?

• DNA provides energy for cellular processes.

• DNA stores genetic information.

• DNA transports oxygen in the blood.

• DNA catalyzes biochemical reactions.

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NGSS.HS-LS3-1

Which of the following pairs of nitrogenous bases are correctly matched according to the base pairing rules?

• Adenine and Guanine

• Cytosine and Thymine

• Adenine and Thymine

• Guanine and Thymine

What role do hydrogen bonds play in the structure of DNA?

• They connect the sugar and phosphate groups.

• They hold the two strands of the double helix together.

• They form the backbone of the DNA molecule.

• They link the nucleotides together in a single strand.

Tags

NGSS.HS-LS1-1