34. Which of the following statements about intermediate filaments is NOT TRUE?
(A) They are cytoskeletal fibers with a diameter of 8-12 nm.
(B) Their constituent proteins are highly heterogeneous and express in a cell-type specific manner.
(C) Their main function is to maintain cell shape and anchor organelles such as mitochondria.
(D) They also express in nucleus and form nuclear lamina.
(E) Vesicle can travel along intermediate filaments through interaction with motor proteins.

30. You are observing a population of lizards when you notice that the number of adults has increased and is higher than previously observed. One explanation for such an observation would include ____. (A) increased birth rate (B) decreased emigration (C) increased emigration (D) increased immigration (E) reduction in death rate

31. Which of the following pair of hormones have antagonistic effects? (A) thyroid hormone and parathyroid hormone (B) epinephrine and norepinephrine (C) glucagon and insulin (D) prolactin and oxytocin (E) androgen and estrogen

32. Which of the following is true of members of the phylum Cnidaria? (A) They are not capable of locomotion because they lack true muscle tissue. (B) They are primarily filter feeders. (C) They have either, or both, of two body forms: mobile polyps and sessile medusae. (D) They may use a gastrovascular cavity as a hydrostatic skeleton. (E) They are the simplest organisms with a complete alimentary canal (two openings).

33. The enzyme amylase can break glycosidic linkages between glucose monomers only if the monomers are in the α form. Which of the following could amylase break down? (A) glycogen, starch, and amylopectin (B) glycogen and cellulose (C) cellulose and chitin (D) starch and chitin (E) starch, amylopectin, and cellulose

35. Which of the following statements about glycolysis is NOT TRUE? (A) Glycolysis takes place in cytosol. (B) The ATP made during glycolysis is generated by substrate-level phosphorylation. (C) Glycolysis will proceed in eukaryotic cells whether oxygen is present or absent. (D) During glycolysis, when glucose is catabolized to pyruvate, most of the energy of glucose is transferred to ADP, forming ATP. (E) In addition to ATP, the end products of glycolysis are NADH and pyruvate.

36. About Calvin cycle, which of the following statement is true? (A) reactions occur within the thylakoid membrane. (B) carbon fixation catalyzed by rubisco is the first step of the reaction. (C) reaction includes split water and release of oxygen. (D) the cycle builds sugar from smaller molecules by using ATP and the reducing power of electrons carried by NADH. (E) photophosphorylation occurs and generates ATP.

37. About mitosis and meiosis, which statement is NOT TRUE? (A) Mitosis conserves the number of chromosome sets, producing cells that are genetically identical to the parent cell. (B) Meiosis reduces the number of chromosomes sets from two (diploid) to one (haploid), producing cells that differ genetically from each other and from the parent cell. (C) Meiosis occurs in reproductive cells, forming female and male haploid gametes. (D) DNA replication occurs twice in meiosis but once in mitosis. (E) Cell divides twice in meiosis but once in mitosis.

38. The first cloned cat, called Carbon Copy, was a calico, but she looked significantly different from her female parent. Why? (A) The environment, as well as genetics, affects phenotypic variation. (B) Fur color genes in cats are influenced by differential acetylation patterns. (C) X inactivation in the embryo is random and produces different patterns. (D) Cloned animals have been found to have a higher frequency of transposon activation. (E) The telomeres of the parent's chromosomes were shorter than those of an embryo.

39. The leading and the lagging strands differ in that (A) synthesize leading strands require RNA primer, but synthesize lagging strands do not require RNA primer. (B) the leading strand is synthesized by adding nucleotides to the 3' end of the growing strand, and the lagging strand is synthesized by adding nucleotides to the 5' end. (C) the lagging strand is synthesized continuously, whereas the leading strand is synthesized in short fragments that are ultimately stitched together. (D) the leading strand is synthesized in the same direction as the movement of the replication fork, and the lagging strand is synthesized in the opposite direction. (E) the leading strand is synthesized at twice the rate of the lagging strand.

40. About split gene and RNA splicing, which of the following statements is NOT TRUE? (A) The coding regions are called exons because they are expressed and usually translated into proteins. (B) The other regions called introns. They are noncoding regions, which contain intervening sequences that are nonfunctional. (C) RNA splicing removes introns and joins exons, creating an mRNA molecule with a continuous coding sequence. (D) Alternative RNA splicing is a type of eukaryotic gene regulation in which different RNA molecules are produced from the same primary transcript, depending on which RNA segments are treated as exons and which as introns. (E) Alternative RNA splicing produces a number of different proteins called isoforms from a single gene, therefore significantly expand the repertoire of an eukaryotic genome.