MCQOPTIONS
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MCQOPTIONS
This section includes 35 Mcqs, each offering curated multiple-choice questions to sharpen your Biology Mcqs knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Each bivalent has |
| A. | 3 chromatids |
| B. | 4 chromatids |
| C. | 5 chromatids |
| D. | 2 chromatids |
| Answer» C. 5 chromatids | |
| 2. |
Period between two consecutive divisions is called |
| A. | Interphase |
| B. | Resting phase |
| C. | Mitotic phase |
| D. | Cell cycle |
| Answer» B. Resting phase | |
| 3. |
DNA is synthesized and chromosome number is doubled in |
| A. | G1 phase |
| B. | S phase |
| C. | G2 phase |
| D. | G0 phase |
| Answer» C. G2 phase | |
| 4. |
In case of neurons, post mitotic cell escapes cell cycle and remain in _______ phase whthout proliferating further |
| A. | G0 phase |
| B. | G1 phase |
| C. | G2 phase |
| D. | S phase |
| Answer» B. G1 phase | |
| 5. |
Apoptosis |
| A. | Cell death due to tissue damage |
| B. | Causes inflammation |
| C. | Internal programme of events by which cell commits suicide |
| D. | Damages neighboring cells |
| Answer» D. Damages neighboring cells | |
| 6. |
Mitosis occurs in |
| A. | Diploid cells only |
| B. | Haploid cells only |
| C. | Both diploid and haploid cells |
| D. | Monoploid cells |
| Answer» D. Monoploid cells | |
| 7. |
Microtubules are composed of |
| A. | Action protein |
| B. | Actin and myosin proteins |
| C. | Sphingomyelin and tubulin |
| D. | Tubulin protein and traces of RNA |
| Answer» E. | |
| 8. |
From each pair of centrioles ________ sets of microtubules originate |
| A. | 2 |
| B. | 3 |
| C. | 4 |
| D. | 5 |
| Answer» C. 4 | |
| 9. |
Mitotic apparatus in animals is formed by |
| A. | Aster and spindle |
| B. | Polar and kinetochore microtubules |
| C. | Spindle and RNA |
| D. | Spindle only |
| Answer» B. Polar and kinetochore microtubules | |
| 10. |
Which fibers intedigitate with each other? |
| A. | Astral fibers |
| B. | Kinetochore fibers |
| C. | Polar fibers |
| D. | All of these |
| Answer» D. All of these | |
| 11. |
Morphology of chromosomes is best studied during |
| A. | Telophase |
| B. | Metaphase |
| C. | Prophase |
| D. | All of these |
| Answer» C. Prophase | |
| 12. |
Cytokinins refers to |
| A. | Division of nucleus |
| B. | Division of cytoplasm |
| C. | Division of cell |
| D. | All of these |
| Answer» D. All of these | |
| 13. |
Feature of cancer cells in common? |
| A. | High nucleus to cytoplasmic ratio |
| B. | Prominent nucleoli |
| C. | Many mitosis |
| D. | All of these |
| Answer» E. | |
| 14. |
Cancer cells are |
| A. | Differentiated |
| B. | Undifferentiated |
| C. | Highly differentiated |
| D. | Less differentiated |
| Answer» E. | |
| 15. |
Meiosis occur in |
| A. | Diploid cells only |
| B. | Haploid cells only |
| C. | Both diploid and haploid cells |
| D. | Monoploid cells only |
| Answer» B. Haploid cells only | |
| 16. |
The longest phase of meiosis I is |
| A. | Metaphase |
| B. | Anaphase |
| C. | Prophase |
| D. | Telophase |
| Answer» D. Telophase | |
| 17. |
Which division does not show replication of chromosomes? |
| A. | Mitosis |
| B. | Meiosis I |
| C. | Meiosis II |
| D. | None of these |
| Answer» D. None of these | |
| 18. |
Crossing over in meiosis occurs during |
| A. | Zygotene |
| B. | Pachytene |
| C. | Dislotene |
| D. | Diakinesis |
| Answer» C. Dislotene | |
| 19. |
Which is a feature of malignant tumor? |
| A. | Localized |
| B. | Little deleterious effects |
| C. | Few mitosis |
| D. | Metastasize |
| Answer» E. | |
| 20. |
Interphase of meiosis lacks |
| A. | G0 phase |
| B. | G1 phase |
| C. | G2 phase |
| D. | S phase |
| Answer» D. S phase | |
| 21. |
Homologous chromosomes are |
| A. | Similar and identical |
| B. | Identical but not similar |
| C. | Not similar and not identical |
| D. | Similar but not identical |
| Answer» E. | |
| 22. |
A significant happening of meiosis is / are |
| A. | Crossing over |
| B. | Random assortment |
| C. | Both of these |
| D. | None of these |
| Answer» D. None of these | |
| 23. |
Meiosis occurs at the time of |
| A. | Gamete formation in animals |
| B. | Spore formattion in plants |
| C. | Growth in animals |
| D. | Both a and b |
| Answer» E. | |
| 24. |
Tetrad or bivalent is |
| A. | Paired homologous chromosome but not fused complex structure |
| B. | 2 unpaired homologous chromosome |
| C. | Paired and fused complex structure |
| D. | None of these |
| Answer» B. 2 unpaired homologous chromosome | |
| 25. |
Mitosis takes place during |
| A. | Healing of wound |
| B. | Development and growth |
| C. | Vegetative propagation |
| D. | All of these |
| Answer» E. | |
| 26. |
Pairing of homologous chromosomes is completed in |
| A. | Leptotene |
| B. | Zygotene |
| C. | Pachytene |
| D. | Diplotene |
| Answer» D. Diplotene | |
| 27. |
Crossing over occurs between |
| A. | Sister chromatids |
| B. | Non sister chromatids |
| C. | Independent chromatids |
| D. | Each and every chromatid |
| Answer» C. Independent chromatids | |
| 28. |
Inability of chromosomes to segregate during anaphase and telophase of meiosis is called |
| A. | Crossing over |
| B. | Chromosomal disjunction |
| C. | Chromosomal nondisjunction |
| D. | None of these |
| Answer» D. None of these | |
| 29. |
A special area of centromere with specific base arrangement and specific proteins where spindle fibers are attached is called |
| A. | Chromatin |
| B. | Aster |
| C. | Kinetochore |
| D. | Primary constriction |
| Answer» D. Primary constriction | |
| 30. |
Each kinetochore gets ________ fibers in mitosis |
| A. | 5 |
| B. | 4 |
| C. | 3 |
| D. | 2 |
| Answer» E. | |
| 31. |
Most critical phase of mitosis is |
| A. | Prophase |
| B. | Anaphase |
| C. | Metaphase |
| D. | Telophase |
| Answer» C. Metaphase | |
| 32. |
Reverse of prophase is |
| A. | Interphase |
| B. | Metaphase |
| C. | Anaphase |
| D. | Telophase |
| Answer» E. | |
| 33. |
In plants mitotic apparatus consists of |
| A. | Centriole |
| B. | Centriole and asters |
| C. | Centrioles, asters and spindles |
| D. | Spindles only |
| Answer» E. | |
| 34. |
Which statement is not true about phragmoplast? |
| A. | Formed from vesicle originating from Golgi apparatus |
| B. | Present in plants only |
| C. | Formed at the end of anaphase |
| D. | Centre of dividing cell |
| Answer» D. Centre of dividing cell | |
| 35. |
Spread of tumor cells and establishment of secondary areas of growth is |
| A. | Benign tumors |
| B. | Cancer |
| C. | Metastasis |
| D. | Epistasis |
| Answer» D. Epistasis | |