Membrane lipids are capable of many different types of movement. Which of these does not occur spontaneously in biological membranes?
(a) switching between lipid layers
(b) lateral movement
(c) rotation
(d) flexing of hydrocarbon chains
(a)
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The skin surface is a favorable environment for colonization of Gram-negative bacteria.
Answer the following statement true (T) or false (F)
At which of the following stages of meiosis would homologous chromosomes be paired?
A) prophase of meiosis I B) both prophase of meiosis I and prophase of meiosis II C) metaphase of meiosis I D) metaphase of meiosis II E) both prophase of meiosis I and metaphase of meiosis I
The chromosomes move to opposite poles during
a. anaphase. b. metaphase. c. interphase. d. prophase. e. telophase.
Which type of crossover event produces no recombinant chromosomes?
A) single-strand crossover B) two-strand double crossover C) three-strand double crossover D) four-strand double crossover E) None of the above; all crossover events produce recombinant chromosomes.