Deoxyribose is
a. a five-carbon sugar.
b. present in RNA.
c. a nitrogen-containing base.
d. one type of purine.
c
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You look in the microscope and see sister chromatids moving to opposite sides of the cell. You conclude the cell is in
A. prophase. B. telophase. C. interphase. D. metaphase. E. anaphase.
Part complete Identify the phase of mitosis, which ends when daughter chromosomes move to the centrioles at opposite poles of the cell.
a. metaphase b. prophase c. telophase d. interphase e. anaphase
Table 2.2 NaOH ? Na+ + OH- — base HF ? H+ + F- - acid MgSO4 ? Mg2+ + SO42- — salt KH2PO4 ? K+ + H2PO4- — acid H2SO4 ? 2H+ + SO42- — salt Which of the following statements about the reactions in Table 2.2 is FALSE?
A) They are exchange reactions. B) They are ionization reactions. C) They occur when the reactants are dissolved in water. D) They are dissociation reactions. E) They are reversible reactions.
In somatic cells, if a base is mismatched in one new daughter strand during DNA replication, and is not repaired, what fraction of the DNA duplexes will have a permanent change in the DNA sequence after the second round of DNA replication?
(a) 1/2 (b) 1/4 (c) 1/8 (d) 1/16