27. Axoneme structure is assembled from nine triplets of microtubules b. central

Question

27. Axoneme structure is assembled from nine triplets of microtubules b. central pair of singlet microtubules a c. nine doublet fibers of microtubules plus central doublet d. microtubule organizing center e. basal body 28. Motor proteins that move the proteins or organelles as cargos in the direction+ 29. Inhibitors which prevent assembly of microtubules are: 30. Proteins that produce non polymerizing intermediate filaments are: are: a. kinesins b. nexins c. dyneins d. subfiber A e subfiber B a. colchisine b. taxol c. nocodazole d. ATP e. Phalloidin a. tubulins b. actin c.antibodies d. keratins e. lamins 31. Which is not the stage of interphase ? a. Gl b. S cmetaphase d. Go e. G2 32. Which stage is described by the following statement: The chromosomes are aligned in the plane midway between the centrosomes and perpendicular to the spindle axis. a. prophase b. pro-metaphase c. metaphase d. anaphase e. telophase 33. This following description describes fibers Fibers radiate outward from one centrosome toward equatorial plane and beyond where they interact with their counterparts from the opposite centrosome. a. astral fibers b. spindle fibers c. polar fibers d. kinetochore fibers e. contractile ring 34. Active cyclin dependent kinase is phosphorylated at a. Tyr 15 residue b. Thr 161 residue 35. MPF complex activation regulates the entry of the cell into a. M phase b. Gl phase c. G2 phase d. interphase e. S phase 36. Which among the listed proteins are not involved in transport across the plasma membrane a. channel proteins b. carrier proteins c. catenin proteins d. cadherins e. kinesins 37. Connection between cells produced by intermediate filaments of adjacent cells forming a transcellular network that provides strength and elasticity to an epithelium is a. tight junction b. desmosomes e. gap junction d. none of the above e. all of the above 38. Structures anchoring the epithelial cells to the basement membrane are a. tight junctions b. adherent junctions c. desmosomes d. hemidesmosomes e. gap junctions 39. Signaling involving molecular signals affecting the nearby cells is a. endocrine b. autocrine c. paracrin e d. hormonal e. secondary 40. Enzymes that transfer a phosphate group from ATP to a receiver are b. hydrolases c. phosphatases a. proteases d. kinases e. G proteins 41. Among the hormonal substances which require a plasma membrane receptor are ?: b. Polypeptides like glucagon or insulin a. Steroids

Explanation / Answer

27.c.nine doublet fibers of microtubules plus central doublet.

28.c. Dyeniens

29.c. nocodazole

30.b. Actin

31.c. metaphase

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