Cell Cycle And Cell Division

Q1. What is the function of mitosis?

1. Cell division.
2. Growth.
3. Growth and repair.
4. None of these.

Q2. Karyokinesis is the term used for:

1. Division of cytoplasm.
2. Division of nucleoplasm.
3. Division of nucleus.
4. Separation of daughter chromosomes.

Q3. What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip
cells?

1. 42
2. 63
3. 84
4. 21

Q4. During mitosis ER and nucleolus begin to disappear at:

1. Late prophase.
2. Early metaphase.
3. Late metaphase.
4. Early prophase.

Q5. The stage in which daughter chromosomes move toward the poles of the spindle is:

1. Anaphase
2. Metaphase
3. Prophase
4. Telophase

Q6. Meiosis results in diploid organisms.

1. Production of gametes.
2. Reduction in the number of chromosomes.
3. Introduction of variation.
4. All of the above.

Q7. Lampbrush chromosomes occur during.

1. Prophase of mitosis.
2. Diplotene of meiosis.
3. Metaphase of meiosis.
4. Interphase.

Q8. Programmed cell death (apoptosis).

1. Is a natural process during development.
2. Is signaled by the initiated of mitosis.
3. Occurs in cells that have been deprived of essential nutrients.
4. None of these.

Q9. How many mitotic divisions are needed for a single cell to make 128 cells?

1. 7
2. 14
3. 28
4. 64

Q10. The time gap between Meiosis I and Meiosis II, is

1. G, phase.
2. Interphase.
3. G, phase.
4. Interkinesis.

Q11. Genophore/bacterial genome or nucleoid is made of:

1. Histones and non-histones.
2. RNA and histones.
3. A single double stranded DNA.
4. A single stranded DNA.

Q12. In meiosis, the centromeres divide during

1. Anaphase I
2. Anaphase II
3. Telophase I
4. Telophase II

Q13. What is true about telophase stage?

1. Nuclear envelope, nucleolus, Golgi complex and ER reform.
2. Chromosomes cluster at opposite spindle poles.
3. Chromosomes lose their identity as discrete elements.
4. All of these.

Q14. Genes located on mitochondrial DNA.

1. Generally show maternal inheritance.
2. Are always inherited from the male parent.
3. Show biparental inheritance like the nuclear genes.
4. Are not inherited.

Q15. In animal cells, cytokinesis involves.

1. The contraction of the contractile ring of microfilament.
2. Depolymerisation of kinetochore microtubules.
3. A protein kinase that phosphorylates other enzymes.
4. The separation of sister chromatids.

Q16. At what stage of the cell cycle are histone proteins synthesized in a eukaryotic cell?

1. During G -stage of prophase.
2. During S-phase.
3. During entire prophase.
4. During telophase.

Q17. Lampbrush chromosomes are observed in:

1. Mitotic prophase
2. Mitotic metaphase
3. Meiotic metaphase
4. Meiotic prophase

Q18. Hammerling’s experiments of Acetabularia involved exchanging.

1. Cytoplasm.
2. Nucleus.
3. Rhizoid and stalk.
4. Gametes.

Q19. Extra nuclear DNA (genes) are located in:

1. Lysosomes and chloroplasts.
2. Golgi complex and ribosomes.
3. Chloroplasts and mitochondria.
4. Ribosomes and mitochondria.

Q20. Golgi complex and endoplasmic reticulum cannot be seen during:

1. Late telophase.
2. Late prophase.
3. Early anaphase.
4. Late metaphase.

Q21. What type of plant is formed when colchicine is used in the process of development of Raphanobrassica?

1. Autotetraploid
2. Haploid
3. Triploid
4. Allotetraploid

Q22. The best stage to observe the shape, size, and number of chromosomes is:

1. Interphase.
2. Metaphase.
3. Prophase.
4. Telophase.

Q23. Ribosomes are produced in:

1. Nucleolus.
2. Cytoplasm.
3. Mitochondria.
4. Golgibody.

Q24. Which of the following carry the same genetic information?

1. Sister chromatids.
2. X and Y chromosomes.
3. All autosomes.
4. Homologous chromosomes.

Q25. The best material for the study of mitosis in the laboratory is:

1. Anther.
2. Root tip.
3. Leaf tip.
4. Ovary.

Q26. A bivalent consists of:

1. Four chromatids and four centromeres.
2. Four chromatids and two centromeres.
3. Two chromatids and two centromeres.
4. Two chromatids and one centromeres.

Q27. The number of chromatids in a chromosome at anaphase is:

1. 1 in mitosis and 2 in meiosis.
2. 2 each in mitosis and meiosis.
3. 2 in mitosis and 4 in meiosis.
4. 2 in mitosis and 1 in meiosis.

Q28. The salivary gland chromosomes in the dipteran larvae are useful in gene mapping because.

1. These are much longer in size.
2. These are easy to stain.
3. These are fused.
4. They have endoreduplicated chromosomes.

Q29. Which kind of cell division takes place in the apical meristem?

1. Mitosis.
2. Meiosis.
3. Mitosis in root and meiosis in flowers.
4. All of the above.

Q30. A bivalent of meiosis-I consists of.

1. Two chromatids and one centromere.
2. Two chromatids and two centromere.
3. Four chromatids and two centromere.
4. Four chromatids and four centromere.