CELL BIO: Please answer as many as you can. I need them to be them 100% correct.

Question

CELL BIO: Please answer as many as you can. I need them to be them 100% correct. if you are at all unsure, please skip it. i dont need an explanation. thank you. even though answers are circled Im not sure if theyre right or not

6. Which of the following is not true regarding actin filaments? a. They are polar b. They are rapidly assembled and disassembled c. They have the largest diameter of all cytoskeletal filaments They are the most plentiful cytoskeletal filaments in a given o Match the actin binding protein with its function 37. Capping proteins 38. Severing proteins 39. Monomer-sequestering proteins 40. Nucleating proteins Break apart actin filaments a. b. Activate actin subunits to assemble into filaments c. Prevent actin subunits from forming filaments d. Stabilizes actin fila Match the phase of the cell cycle with the appropriate eve 41. G2 nt a. Majority of cell growth b. Replication of the c. Condensin activation d. DNA Polymerase activity 42. S 43. M 44. GI 45. Which of the following is not true regarding cyclin-dependent kinases? a. Mammalian cells contain one type of cyclin-dependent kinase, which can get activated to perform different functions by different cyclin subunits b. When activated, they can transition the cell into the next phase of the cell cycle c. They are activated by binding to cyclins d. They are always present in the cell throughout the cell cycle 46. How are cyclins removed from a cell when they are no longer needed? Cyclins are never broken down, they are always present in a cell They are broken down by cytosolic proteases a. b. They are send into the lysosome . d. They are degraded by the proteosome 47. Which checkpoint determin es whether or not a cell makes the commitment to undergo cell division? a. S Checkpoint b. G1 Checkpoint c. G2 Checkpoint d. M Checkpoint 48. Which of the following is not an actual checkpoint? a.. S Checkpoint b. G1 Checkpoint c. G2 Checkpoint d. M Checkpoint 49. Which of the following events prevents a cell from replicating its DNA more than once? a. The assembly of the origin recognition complex b. The binding of cohesin proteins to the replicating sister chromatids The phosphorylation of Cdc25 d. The degradation of Cdc6 50. What happens if the DNA is a cell is damaged? a. p53 degrades cdc6 and prevents the DNA from getting replicated b. p21 degrades cdc6 and prevents the DNA from getting replicated c.) p53 activates the transcription of p21, which blocks the activity of S-Cdk/cyclin complex d. p21 activates the transcription of p53, which blocks the activity of S-Cdk/cyclin complex 51. Which of the following is not needed to shift the cell into M-phase? c. Cdc6 a. M cyclin b. M Cdk Cdc25

Explanation / Answer

36) c) it is a wrong statement

Actin filaments have smallest diameter of 6nm

37)d) stabilizes actin filament

38)a) break apart actin filaments

39)c) prevents actin subunits from forming filaments

40)b)activate actin filaments to assemble into filaments

41)b) replication of centrosome

42)d) DNA polymerase activity

43)c) condensin activation

44)a) majority of cell growth

45)a)

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