This set of Human Physiology Multiple Choice Questions & Answers (MCQs) focuses on “Cell Division”.
1. Synthesis of RNA and proteins take place in ______
a) M phase
b) S phase
c) G1 Phase
d) G2 phase
Explanation: G1 Phase is the first phase of the cell cycle. It is a part of Interphase. Synthesis of RNA and proteins take place in G1 Phase.
2. When does synapsis occur during meiosis?
Explanation: Zygotene is the 2nd stage of the prophase of meiosis. Formation of synaptonemal complexes is seen to form bivalents.
3. Spindle fibers are made up of ___________
Explanation: Tubulin is a protein of globular protein. It forms microtubules. It helps in cell division.
4. Chromosomes are separated during?
Explanation: Anaphase is the 3rd stage of cell division. During this stage chromosomes move away from one another to opposite poles of the spindle.
5. Crossing over occurs between _________
a) Two daughter nuclei
b) Two different bivalents
c) Non sister chromatids of bivalents
d) Sister chromatids of bivalents
Explanation: Crossing over occurs between Non sisters chromatids of bivalents. Chromosomal crossing over is exchange of genetic material between homologous chromosomes that r4esults in recombinant chromosomes.
6. Replication of centriole occurs in ______________
Explanation: Interphase is a phase of cell cycle in which typical cell sends most of its life. During this phase cell copies its DNA in preparation for mitosis.
7. Colchicine arrests which of the following stages of cell division?
Explanation: Colchicine is an alkaloid. It is used to treat acute attacks of gout. Colchicine arrests Metaphase stage of cell division.
8. Cell plate is laid during __________
Explanation: Cytokinesis is a process of cell division which divides cytoplasm of a parental cell into two daughter cells. It occurs with mitosis and meiosis.
9. DNA replicates during ___________
a) G1 phase
b) G2 phase
c) S phase
Explanation: S phase is a part of the cell cycle in which DNA is replicated. Accurate DNA replication is necessary to prevent genetic abnormalities.
10. Crossing over occurs during _________
Explanation: Crossing over occurs during Pachytene. Pachytene is a 3rd stage of the prophase of meiosis.
11. Polyploidy can be artificially induced by __________
a) Self pollination
b) Line breeding
Explanation: Polyploidy s condition in which normally diploid cell acquires one or more additional sets of chromosomes. Polyploidy can be artificially induced by Colchicine.
12. Chromosomes are arranged along equator during ___________
Explanation: Metaphase is the 2nd stage of cell division. During metaphase chromosome arrange themselves in the middle of the cell.
13. Which phase comes between G1 and G2 phase?
Explanation: S phase comes between G1 and G2 phase. It is an important phase.DNA replicates in S Phase.
14. Chiasmata formation takes place during __________
a) Prophase I
b) Metaphase I
c) Anaphase I
d) Telophase I
Explanation: Chiasmata formation takes place during Prophase I. During this stage chromosomes are duplicated. Chiasmata is a point where paired chromosomes remain in contact during the first metaphase of meiosis.
15. Amitosis is shown by _________
Explanation: Amitosis is shown by Bacteria. Amitosis is a simple method of cell division which occurs without the formation of spindles and appearance of chromosomes.
Sanfoundry Global Education & Learning Series – Human Anatomy and Physiology.
To practice all areas of Human Anatomy and Physiology, here is complete set of 1000+ Multiple Choice Questions and Answers.