Biology Dna Questions printable pdf download

Biology Dna Questions

1. The basic unit of the DNA molecule is

(1) a nucleotide

(2) an amino acid

(3) a phosphate group

(4) a nitrogen base

2. The coded information of a DNA molecule is determined by the

(1) sequence of amino acids

(3) sequence of the nitrogenous bases

(2) number of ribose units

(4) sequence of the sugar-phosphate units

3. Which is the sugar component of a DNA nucleotide?

(1) adenine

(2) deoxyribose

(3) glucose

(4) phosphate

4. Which substances are components of a DNA nucleotide?

(1) phosphate, deoxyribose, and uracil

(3) thymine, deoxyribose, and phosphate

(2) phosphate, ribose, and adenine

(4) ribose, phosphate, and uracil

5. Which is the correct identification of the parts of the DNA nucleotide in the diagram below?

(3) A = thymine, B = ribose, C = uracil

(1) A = uracil, B = deoxyribose, C = thymine

(2) A = phosphate, B = ribose, C = uracil

(4) A = phosphate, B = deoxyribose, C = thymine

In the diagram of a polymer above, the repeating subunits are known as

(1) amino acids

(2) polysaccharides

(4) fatty acids

(3) nucleotides

7. Which pair of molecules, when bonded together, would most likely be found in a nucleotide of DNA?

(1) ribose and adenine

(3) deoxyribose and guanine

(2) ribose and thymine

(4) deoxyribose and uracil

8. In nucleotides, the letters A, G, C, and T represent

(1) phosphate groups

(2) deoxyribose sugars

(4) ribose sugars

(3) nitrogenous bases

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Biology Dna Questions