DNA and Nucleotides Quiz

What significant role does DNA play in the formation and development of an organism?

• Encodes information

• Provides protection from disease

• Produces food material

• Releases energy

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Twin colts were born from a black mare and a black stallion. One colt was black, and one was brown. The colts have different traits because their DNA contains—

• different amounts of sugars in their molecules

• different arrangements of nucleotides

• different amounts of the base thymine

• different numbers of proteins in their molecules

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What determines the traits of an organism?

• Relation of AT to CG base pairs

• Number of nitrogen bases in RNA

• Presence of ribose or deoxyribose in a nucleic acid

• Sequence of nitrogen bases in DNA

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Of the following bases, which one is not found in DNA?

• Adenine

• Guanine

• Uracil

• Thymine

The genetic code of organisms determines their traits. Which of the following DNA components make up the genetic code?

• Hydrogen bonds

• Deoxyribose sugars

• Nitrogenous bases

• Phosphate groups

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Which of the following correctly identifies the proper nitrogen base pairing in DNA replication?

• A:T; G:C

• T:C; G:A

• T:U; C:G

• A:U; G:C

The following represents a small section of one strand of DNA: 5’ TACATGTGCCACT 3’. How should the complementary strand of DNA be represented?

• 5’ TACATGTGCCACT 3’

• 3’ ATGTACACCGGTGA 5’

• 5’ UTGTCUCCGGTGU 3’

• 3’ AUGUAGAGGCCUGA 5’

Which of the following statements best describes how the traits of an organism are determined by the DNA in their cells?

• DNA provides the energy needed for an organism to grow and function.

• DNA is copied into mRNA, which controls cellular functions.

• DNA codes for proteins which allow an organism to grow and function.

• DNA unzips and each strand codes for a different amino acid.

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The genetic code for an organism is contained in its DNA molecules. What determines the instructions for a specific trait in an organism?

• Sequence of the nitrogen bases in the DNA molecules

• Length of the DNA molecules

• Number of nucleic acids in the DNA molecules

• Types of nitrogen bases in the DNA molecules

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What process results in two complete strands of DNA from one original strand?

• DNA replication

• DNA transcription

• DNA translation

• DNA transformation