In addition to its role in DNA repair, homologous recombination is also responsible for generating genetic diversity during what process?
A. mitosis
B. meiosis
C. DNA replication
D. independent assortment of chromosomes
E. fertilization
Ans: B. meiosis
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In transformation, cells
a. take up pieces of DNA that are released as other cells disintegrate. b. take up pieces of DNA through infection of a virus. c. replicate DNA molecules. d. make replicate copies of one another. e. generate their own DNA.
Freshwater fish
a. lose water from their bodies. b. Lose salt from their bodies. c. must keep the salt concentration of their bodies lower than that of freshwater. d. must keep the salt concentration of their bodies equal to that of freshwater. e. must drink water to maintain dilute body fluids.
Which of the following produces a permanent carrier state following infection?
A) Borrelia B) cytomegalovirus C) Spirillum D) Toxoplasma E) Yersinia
Which of the following substances is mismatched with its role?
a. Most B vitamins - coenzymes b. Vitamin A - incorporated into visual pigments c. Iron - component of thyroid hormones d. Vitamin D - aids in calcium absorption e. Phosphorus - bone formation, nucleotide synthesis