10 questions in 10 minutes

Q1-2: The image shows two stage of mitosis cell division:

cells_in_prophase + metaphase

 Doc. RNDr. Josef Reischig, CSc.
CC-BY-SA 3.0
(label added)

1. Which stage occurs before stage Y shown in the diagram?

  • A. Prophase
  • B. Metaphase
  • C. Anaphase
  • D. Telophase
2. In the cell Y, sister chromatids are ...
  • A. separating
  • B. joined together
  • C. doubling in size
  • D. halving in size

3. What are the correct characteristics of cytokinesis?

I. Cytokinesis is division of all organelles in the cell
II. Both daughter cells must receive at least one mitochondrion and organelles that can only be produced by dividing a pre-existing structure.
III. Oogenesis in human is an example of unequal cytokinesis
  • A. I and II only
  • B. II and III only
  • C. I, II, and III
  • D. I and III only
4. Which process occurs in meiosis but not in mitosis?
  • A. Attachment of spindle fibres to the centromeres of each chromosome
  • B. Movement of homologous chromosomes to opposite ends
  • C. Replication of DNA prior to the start of cell division
  • D. Condensation and movement of chromosomes to opposite poles
5. In meiosis the nucleus undergoes two divisions. Which of the statements about meiosis I is correct?
  • A.   The number of chromatids is doubled, and the number of chromosomes halved.
  • B.   The number of chromosomes is halved, and the number of nuclei is doubled.
  • C.   The number of chromatids is doubled, and the number of chromosomes doubles.
  • D.   The number of nuclei is halved, and chromosomes is doubled.
6. Which of the following shows the correct sequence for the cell cycle?
  • A.   Mitosis → G1 → S → G2 → Cytokinesis
  • B.   G1 → S → Mitosis → G2 → Cytokinesis
  • C.   G1 → S → G2 → Mitosis → Cytokinesis
  • D.   Cytokinesis → Mitosis → G1 → S → G2
7 In which stage of the cell cycle are the cell organelles duplicated?
  • A. Prophase of mitosis
  • B. G1
  • C. G2
  • D. S

8. Which of the following control the cell cycle?

I. Checkpoints
II. Cyclins
III. Enzymes
  • A.  I only
  • B.  I and II only
  • C.  II and III only
  • D.  I, II and III

9. Which of the following may result in uncontrolled cell division?

I. Conversion of oncogenes to proto-oncogenes
II. Mutations in tumour suppressor genes
III. De-activation of telomerase enzyme
 
  • A. I only
  • B. II only
  • C. I and II only
  • D. II and III only
10. Which of the following correctly compares benign and malignant tumours?
  • A. Benign tumours have a high capacity for metastasis and invasion of neighbouring tissue, while malignant tumours do not.
  • B. Both malignant and benign tumours exhibit increased rates of cell division and growth
  • C. Benign tumours can invade neighbouring tissues and metastasize to distant sites, while malignant tumours remain localized.
  • D. Malignant tumours are generally slow-growing and exhibit low rates of cell division, while benign tumours grow rapidly.