CH_9 - CH 9 Multiple Choice 2. Bacteria typically have _,...

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CH 9 Multiple Choice 2. Bacteria typically have _______, whereas eukaryotes have _______. a. one chromosome that is circular; many that are linear b. several chromosomes that are circular; many that are linear c. one chromosome that is linear; many that are circular d. two chromosomes that are circular; eight that are linear e. None of the above Answer: a 3. Chromosomes contain large amounts of different interacting proteins, which are known as a. pentanes. b. hexosamines. c. histones. d. protein hormones. e. histamines. Answer: c 4. The appropriate decisions to enter the S phase and the M phase of the cell cycle depend on a pair of biochemicals called a. actin and myosin. b. Cdk’s and cyclin. c. ligand and receptor. d. MSH and MSH-receptor. e. ATP and ATPase. Answer: b 5. The molecules that make up a chromosome are a. DNA and RNA. b. DNA and proteins. c. proteins and lipids. d. nucleotides and nucleosides. e. proteins and phospholipids. Answer: b 6. During mitosis and meiosis the chromatin compacts. Which of the following processes takes place more easily because of this compaction? a. The orderly distribution of genetic material to two new nuclei b. The replication of the DNA c. Exposing the genetic information on the DNA d. The unwinding of DNA from around the histones e. The disappearance of the nuclear membrane Answer: a
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7. The basic structure of chromatin has sometimes been referred to as beads on a string of DNA. These beads are called a. chromosomes. b. chromatids. c. supercoils. d. interphases. e. nucleosomes. Answer: e 8. DNA replication occurs a. during both mitosis and meiosis. b. only during mitosis. c. only during meiosis. d. during the S phase. e. during G2. Answer: d 10. When cyclin binds Cdk, a the cell transitions from G2 to S. b. kinase activation occurs. c. chromosomes condense. d. the cell quickly enters M phase.
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CH_9 - CH 9 Multiple Choice 2. Bacteria typically have _,...

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