DNA/ RNA Structure & Function Quiz

A single nucleotide of DNA is composed of which of the following substances?

• adenine, guanine, and cytosine

• hydrogen, a phosphate group, and adenine

• ribose sugar, deoxyribose sugar, and thymine

• deoxyribose sugar, a phosphate group, and a nitrogenous base

A strand of DNA has these bases: AGC CAT GTA TAC What is the complementary DNA strand?

• ACG GAT CTA TAG

• TCG GTA CAT ATG

• TGC CTA GAT ATC

• UCG CUA CAU AUG

What structure does letter b represent in the diagram above?

• Deoxyribose

• Nitrogen bases

• Amino Acids

• Phosphates

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The sides of the DNA molecule (letter c and d) are made up of which of the following molecules?

• Adenine and Phosphate

• Deoxyribose and Thymine

• Phosphates and Nucleotides

• Deoxyribose and Phosphates

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What structure is being represented by letter a in the diagram above?

• Nitrogen bases

• Weak hydrogen bonds

• Weak covalent bonds

• A phosphate

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If a DNA molecule has 20% Adenine, what % of the molecule will be Cytosine?

• 10%

• 30%

• 80%

• 60%

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Which statement best describes the relationship that exists among proteins, DNA, and cells?

• Proteins combine to produce cells, which produce DNA.

• Proteins are made up of DNA, which determines the cells that are produced

• DNA is made up of proteins, which tell a cell how to function

• Cells contain DNA, which controls the production of proteins.

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The bonds in a DNA molecule that hold base pairs together are weak hydrogen bonds. Why must these bonds be weak?

• They need to separate to make ribosomes

• To break apart for the replication of DNA

• They need to easily leave the nucleus

• To allow phosphates to bond to bases

Which of the following is a similarity between DNA and RNA molecules?

• Contain the same sugar

• Contains a nitrogenous base known as uracil

• Contains a phosphate

• Are both double-stranded molecules

Which molecule(s) would you find in the nucleus?

• Molecule A only

• Molecule B only

• Both Molecule A and B

• Neither molecule would be found in a nucleus

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