If cells are grown in a medium containing radioactive

If cells are grown in a medium containing radioactive ³²P-labeled phosphate, which of these
molecules will be labeled?
A) phospholipids
B) nucleic acids
C) proteins
D) amylose
E) both phospholipids and nucleic acids
E
If cells are grown in a medium containing radioactive ¹⁵N, which of these molecules will be labeled?
A) fatty acids only
B) nucleic acids only
C) proteins only
D) amylase only
E) both proteins and nucleic acids
E
How will brief heating (to 95°C) affect macromolecular structures in aqueous solution?
A) DNA duplexes will unwind and separate.
B) Proteins will unfold (denature).
C) Starch will hydrolyze into monomeric sugars.
D) Proteins will hydrolyze into amino acids.
E) DNA duplexes will unwind and separate, and proteins will unfold (denature).
E

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360.
361.
362.
363.
Which of the following is not a monomer/polymer pairing?
A) monosaccharide/polysaccharide
B) amino acid/protein
C) triglyceride/phospholipid bilayer
D) deoxyribonucleotide/DNA
E) ribonucleotide/RNA
C
If two molecules of the general type shown in Figure 5.1 were linked together, carbon-1 of one
molecule to carbon-4 of the other, the single molecule that would result would be
A) maltose.
B) fructose.
C) glucose.
D) galactose.
E) sucrose.
A
Which of the following descriptors is true of the molecule shown in Figure 5.1?
A) hexose
B) fructose
C) glucose
D) hexose and fructose only
E) hexose and glucose only
E
Which of the following statements is true regarding the molecule illustrated in Figure 5.2?
A) It is a saturated fatty acid.
B) A diet rich in this molecule may contribute to atherosclerosis.
C) Molecules of this type are usually liquid at room temperature.
D) It is a saturated fatty acid and a diet rich in this molecule may contribute to atherosclerosis.
E) It is a saturated fatty acid, a diet rich in this molecule may contribute to atherosclerosis, and
molecules of this type are usually liquid at room temperature.

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365.
366.
367.
D
Which of the following statements is true regarding the molecule illustrated in Figure 5.3?
A) It is a saturated fatty acid.
B) A diet rich in this molecule may contribute to atherosclerosis.
C) Molecules of this type are usually liquid at room temperature.
D) It is a saturated fatty acid and a diet rich in this molecule may contribute to atherosclerosis.
E) It is a saturated fatty acid, a diet rich in this molecule may contribute to atherosclerosis, and
molecules of this type are usually liquid at room temperature.
C
The molecule shown in Figure 5.3 is a
A) polysaccharide.
B) polypeptide.
C) saturated fatty acid.
D) triacylglycerol.
E) unsaturated fatty acid.
E
What is the structure shown in Figure 5.4?
A) pentose molecule
B) fatty acid molecule
C) steroid molecule
D) oligosaccharide molecule
E) phospholipid molecule
C

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