Cell_Biology - Cell Biology 1 Which of the following...

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Cell Biology 1. Which of the following contains nitrogen in addition to carbon, oxygen, and hydrogen? A) an amino acid such as glycine B) an alcohol such as ethanol C) a monosaccharide such as starch D) a steroid such as testosterone E) a hydrocarbon such as benzene 2. Which bonds are created during the formation of the primary structure of a protein? A) peptide bonds B) hydrogen bonds C) disulfide bonds D) Only A and C are correct. E) A, B, and C are correct 3. Which of the following is true of both starch and cellulose? A) They can both be digested by humans. B) They are both structural components of the plant cell wall. C) They are geometric isomers of each other. D) They are both polymers of glucose. E) They are both used for energy storage in plants. 4. Which of the following is true concerning saturated fatty acids? A) They are the predominant fatty acid in corn oil. B) They have double bonds between the carbon atoms of the fatty acids. C) They are usually liquid at room temperature. D) They are usually produced by plants. E) They have a higher ratio of hydrogen to carbon than do unsaturated fatty acids. 5. When biologists wish to study the internal ultrastructure of cells, they most likely would use A) a transmission electronic microscope. B) a light microscope. C) a scanning electron microscope. D) both A and C. E) A, B, and C. 6. Which of the following is not a part of the endomembrane system? A) rough endoplasmic reticulum B) smooth endoplasmic reticulum C) Golgi apparatus D) mitochondria E) lysosomes 7. Which type of organelle is primarily involved in the synthesis of oils, phospholipids, and steroids? A) lysosomes B) mitochondria C) contractile vacuoles D) ribosomes E) smooth endoplasmic reticulum 8. All of the following are functions of integral membrane proteins except A) enzyme synthesis. B) active transport.
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C) cell adhesion. D) cytoskeleton attachment. E) hormone reception. 9. All of the following statements about membrane structure and function are true except: A) Both sides of a membrane are identical in structure and function. B) Special membrane proteins can cotransport two solutes by coupling diffusion with active transport. C) Diffusion, osmosis, and facilitated diffusion do not require any energy input from the cell. D) Voltage across the membrane depends on an unequal distribution of ions across the plasma membrane. E) Diffusion of gases is faster in air than across membranes. 10. The presence of cholesterol in the plasma membranes of some animals A) enables the animal to remove hydrogen atoms from saturated phospholipids. B) makes the animal more susceptible to circulatory disorders. C) makes the membrane less flexible, so it can sustain greater pressure from within the cell. D) enables the membrane to stay fluid more easily when cell temperature drops.
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This note was uploaded on 01/02/2012 for the course BIOL 180 taught by Professor Freeman during the Fall '07 term at University of Washington.

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Cell_Biology - Cell Biology 1 Which of the following...

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