The purines found in DNA are ________ and guanine.
A) cytosine
B) adenine
C) thymine
D) uracil
E) niacin
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Question 2) The three structural components of a nucleotide are a pentose, a phosphate group, and a ________ base.
A) nucleic
B) hydrophilic
C) hydrochloric
D) nitrogenous
E) sulfuric
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Question 3) The molecule DNA contains a five-carbon sugar called
A) glucose.
B) fructose.
C) maltose.
D) ribose.
E) deoxyribose.
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Question 4) The structure of RNA differs from DNA in that
A) the backbone of RNA contains ribose.
B) RNA contains pyrimidines but not purines.
C) RNA contains purines but not pyrimidines.
D) DNA contains pyrimidines but not purines.
E) DNA contains purines but not pyrimidines.
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Question 5) Adenine and guanine are
A) purines represented by T and C.
B) pyrimidines represented by A and G.
C) purines represented by A and G.
D) pyrimidines represented by T and C.
E) nucleotides represented by A and G.
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Question 6) According to the rules of complementary base pairing in nucleic acids, cytosine would pair with the base
A) thymine.
B) adenine.
C) uracil.
D) cytosine.
E) guanine.
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Question 7) A nucleotide consists of a
A) five-carbon sugar and phosphate group.
B) five-carbon sugar and a nitrogenous base.
C) phosphate group and a nitrogenous base.
D) five-carbon sugar, a nitrogenous base, and a phosphate group.
E) five-carbon sugar and an amino acid.
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Question 8) An amino acid is to a protein as a ________ is to a nucleic acid.
A) purine
B) nucleotide
C) protein
D) proton
E) neutron
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Question 9) Molecules that store and process genetic information are the
A) proteins.
B) nucleic acids.
C) carbohydrates.
D) lipids.
E) steroids.
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Question 10) Mucins are a type of ________ that absorb water to form mucus.
A) glycolipid
B) glycoprotein
C) proteoglycan
D) glyceride
E) glycerol
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