*0. II a cell does not receive a go ahead signal at the Gl checkpoint in the cell cycle then it will a. proceed On to the "S" phase b. go directly to jail - D0 not pass GO. DO nột collect $200 C. proceed to mitosis d. enter a nondividing state called the Go phase
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- 38. The most likely checkpoint to be 'ignored' by malignant cells is the _____ a) G2/M checkpoint b) G1/S checkpoint c) spindle checkpoint d) G0/M checkpoint e) G1/M checkpointWhich of the following would not happen if G₁ checkpoint was mutated or damaged in a cell? a The cell would not be large enough. b The cell would not continue on to the S stage. c The cell would not have enough nutrients to enter the next stage. d The cell would die.Briefly Mentionabout the important functions of apoptosis & autophagy.
- List some reason why a cell that has just completed cytokinesis might enter the G zero phase instead of the G1 phaseChoose all of the TRUE statements. Hint: 4 statements are true. Cytokinesis occurs the same way in both plant and animal cells. Sister chromatids are genetically identical. The term chromosome can be used to describe both chromosomes composed of one and two chromatids. Mitosis results in daughter cells that are genetically identical to the parent cell. All eukaryotic somatic cells are diploid. Cyclin dependent kinases are present but not active in cell cycle regulation without the presence of cyclin proteins. Chromosomes are always visible in the cell.31. “Wnt”is a regulatory factor that regulate myogenic stem cell proliferation? True False
- Which negative regulatory molecule can trigger cell suicide (apoptosis) if vital cell cycle events do not occur? a. p53 b. p21 c. retinoblastoma protein (Rb) d. cyclin-dependent kinase (Cdk)What is the significance of the cell cycle control system and checkpoints? Explain step by step in your own words. [please make it simple]Neurons are arrested in ________ of the cell cycle. a. G1 b. anaphase c. prophase d. S phase
- Rb is a negative regulator that blocks the cell cycle at the G1 checkpoint until the cell achieves a requisite size. What molecular mechanism does Rb employ to halt the cell cycle?List some reasons why a cell that has just completed cytokinesis might enter the G0 phase instead of the G1 phase.Apoptosis can occur in a cell when the cell is damaged no longer needed infected by a virus all of the above