13. If a pharmaceutical company wished to design a drug to maintain low blood sugar levels, one appr
14. Caffeine is an inhibitor of phosphodiesterase. Therefore, the cells of a person who has recently
15. What is a chromatid?(A) a chromosome in G1 of the cell cycle(B) a replicate chromosome(C) a chro
17. If there are 20 chromatids in a cell at metaphase, how many chromosomes are there in each daught
18. Which of the following occurs in meiosis but not in mitosis?(A) Chromosome replication(B) Synaps
19. Homologous chromosomes synapse and crossing over occurs(A) The statement is true for mitosis onl
20. Which of the following happens at the conclusion of meiosis I?(A) Homologous chromosomes are sep
21. In certain plants, tall is dominant to short. If a heterozygous plant is crossed with a homozygo
23. Mendel was able to draw his ideas of segregation and independent assortment because of the influ
24. Skin color in a certain species of fish is inherited via a single gene with four different allel
25. Calico cats are female because(A) a male inherits only one of the two X-linked genes controlling
26. If a human interphase nucleus contains three Barr bodies, it can be assumed that the person(A) h
28. In trying to determine whether DNA or protein is the genetic material, Hershey and Chase made us
31. Which of the following is not true of RNA processing?(A) Exons are cut out before mRNA leaves th
33. What are polyribosomes?(A) groups of ribosomes reading a single mRNA simultaneously(B) ribosomes
34. The role of a metabolite that controls a repressible operon is to(A) bind to the promoter region