12th class (Fsc) Biology unit 7 MCQs
chapter 7 MCQs 12th Class Biology
Cell Cycle:
1. Never cells and eye lens cells remain in ……… stage for life time.
a. Go
b. G1
c. S
d. G2
2. The period of life cycle of cell between two consecutive divisions is termed as:
a. G 1 phase
b. Resting phase
c. G2 phase
d. Inter phase
3. In the case of human cell, average cell cycle is about:
a. 28 hours
b. 24 hours
c. 30 hours
d. 26 hours
4. Full cycle in yeast cells has length of:
a. 90 minutes
b. 30 minutes
c. 120 minutes
d. 60 minutes
5. DNA synthesis and chromosomal doubling occurs in:
a. G0 – phase
b. G1 – phase
c. S – phase
d. G2 – phase
6. Interphase period can be divided into:
a. G1, S, G2
b. G1, G2, G3
c. S1, G1, S2
d. G1, G2, G3
7. Mitotic cells can exist cell cycle during:
a. S – phase
b. G0 -phase
c. G2 -phase
d. G1 -phase
8. The duration of mitosis in human cell cycle is:
a. 30 days
b. 30 hours
c. 30 min
d. 30 sec
9. A group of similar cells that performs a specific function is called:
a. Organelle
b. Organ
c. Organ system
d. Tissue
10. The percentage of lipids in plasma membrane is:
a. 20-40%
b. 60-80%
c. 10-20%
d. 30-60%
11. The feeding stage of a slime mold is called:
a. Mycellium
b. Thallus
c. Plasmodium
d. Hyphae
12. Thylakoid membranes are involved in ATP synthesis by:
a. Chemiosmosis
b. Glycolysis
c. Photolysis
d. Dark reaction
13. The full cell cycle in yeast cells is completed in:
a. 30 minutes
b. 24 hours
c. 90 minutes
d. 4.5 hours
14. Cell cycle involves:
a. Cell division
b. Growth of cell
c. Replication of DNA
d. All of these
15. Post mitotic cells can exist the cell cycle during:
a. S-Phase
b. G0 -Phase
c. G2 -Phase
d. G1 -Phase
16. Chromosomal Doubling Occurs in:
a. G2 -Phase
b. S-Phase
c. G0 -Phase
d. G1 -Phase
17. During which stage chromosomal are doubled:
a. G2 -phase
b. G1 -phase
c. G0 -phase
d. S-Phase
18. Mitosis is divided into:
a. Karyokinesis
b. Cytokinesis
c. Interphase
d. Both A & B
19. Separation of homologous chromosomes occurs during:
a. Telophase
b. Prophase
c. Anaphase
d. Metaphase
20. The chromosomes appear as thin threads having length of:
a. 0.25μm to 50μm
b. 0.25nm to 50nm
c. 0.025μm to 50μm
d. 0.025nm to 50nm
21. A network of very fine threads called chromatin material can be visualized in cell during:
a. Anaphase
b. Interphase
c. Prophase
d. Metaphase
22. Karyokinesis involves division of:
a. Cytoplasm
b. Cell
c. Cell membrane
d. Nucleus
23. For the formation of phragmoplast, the vesciles orginate from:
a. Chloroplast
b. Endoplasmic reticulum
c. Mitochondria
d. Golgi complex
24. The microtubule of mitotic apparatus are composed of protein tubulin and traces of:
a. Actin
b. Myosin
c. Tubulin
d. Troponin
25. The microtubules of mitotic apparatus are composed of protein tubulin and traces of:
a. Lipids
b. DNA
c. Terpenoids
d. RNA