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FREE AND STUDY GAMES ABOUT BIO TEST EXAM
QUESTIONS
Actual Qs and Ans Expert-Verified Explanation
This Exam contains:
-Guarantee passing score -39 Questions and Answers -format set of multiple-choice -Expert-Verified Explanation Question 1: 14. If there are 20 centromeres in a cell at anaphase, how many chromosomes are there in each daughter cell following cytokinesis
Answer:
? 10 Question 2: ? A group of cells is assayed for DNA content immediately following mitosis and is found to have an average of 8 pictograms of DNA per nucleus. How many picograms would be found at the end of S and the end of G2
Answer:
? 16; 16
Question 3: 43. Which of the following most accurately describes a cyclin
Answer:
? It activates a Cdk molecule when it is in sufficient concentration Question 4: 13. At which phase are centrioles beginning to move apart in animal cells
Answer:
? Prophase
Question 5: 51. All cell cycle checkpoints are similar in which way
Answer:
? They give the go-ahead signal to progress to the next checkpoint
Question 6: 40. Which of the following is true concerning cancer cells
Answer:
? When they stop dividing, they do so at random points in the cell cycle; they are not subject to cell cycle controls; and they do not exhibit density- dependent inhibition when growing in culture Question 7: 10. Which statement provides the best description of the interphase portion of the cell cycle
Answer:
? During interphase, a cell is metabolically active Question 8: 28. Where do the microtubules of the spindle originate during mitosis in animal cells
Answer:
? Centrosome
Question 9: 17. What is a cleavage furrow
Answer:
? A groove in the plasma membrane between daughter nuclei
Question 10: What is true of all cancers
Answer:
? They have escaped normal cell cycle controls Question 11: 12. If there are 20 chromatids in a cell, how many centromeres are there?
Answer:
? 20 Question 12: 44. At the M phase checkpoint, the complex allows for what to occur
Answer:
? Separase enzyme cleaves cohesions and allows chromatids to separate
Question 13: 19. A plant-derived protein known as colchicine can be used by blocking the formation of the spindle. Which of the following would result in colchicine is added to a sample of cells in G2
Answer:
? The chromosomes would coil and shorten but have no spindle to which to attach Question 14: 11. Starting with a fertilized egg (zygote), a series of five cell divisions would produce an early embryo with a how many cells
Answer:
? 32 Question 15: 52. Anchorage dependence of animal cells in vitro or in vivo depends on which of the following?
Answer:
? Response of the cell cycle controls to signals from the plasma membrane
Question 16: 26. These protists are intermediate in what sense
Answer:
? They maintain a nuclear envelope during division Question 17: 50. besides the ability of some cancer cells to overproliferate, what else could logically result in a tumor
Answer:
? Lack of appropriate cell death Question 18: 8. The cell cycle control systems of cancer cells differ from those of normal cells.Select the best explanation for this fact
Answer:
? Genetic changes alter the function of the cancers cell's protein products Question 19: 36. Which of the following triggers the cell's passage past the G2 checkpoint into mitosis
Answer:
? MPF
Question 20: 15. Measurements of the amount of DNA per nucleus were taken on a large number of cells from a growing fungus. The measured DNA levels ranged from 3 to 6 picograms per nucleus. In which stage of the cell cycle did the nucleus contain 6 picograms of DNA
Answer:
? G2 Question 21: Using which of the following techniques would enable your lab group to distinguish between a cell in G2 and a cell from the same organism in G1
Answer:
? Radioactive-labeled nucleotides Question 22: 9. If a eukaryotic cell is in the G1 phase of the cell cycle, which statement about the cell's chromosomes must be correct
Answer:
? Each chromosome is made of a complex of DNA and associated proteins Question 23: 49. Proteins that are involved in the regulation of the cell cycle, and that show fluctuations in concentration during the cell cycle, are called
Answer:
? Cyclins Question 24: 34. Which of the following is a protein synthesized at specific times during the cell cycle that associated with a kinase to form a catalytically active complex
Answer:
? Cyclin Question 25: 41. Which of the following describe(s) cyclin-dependent kinase (Cdk)
Answer:
? Cdk is present throughout the cell cycle and is an enzyme that attaches phosphate groups to other proteins Question 26: 33. Which of the following is release by platelets in the vicinity of an injury
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