11. A mammal that lays eggs:
(A) Pteropus
(B) Lemur
(C) Talpa
(D) Echidna.
12. A plant cell shrinks when placed in
(A) A hypertonic solution
(B) A hypotonic solution
(C) Water
(D) A solution is isotonic with the cell sap.
13. Which of the following becomes zero in a fully turgid(রসস্ফীত) cell?
(A) Osmotic pressure
(B) All of the above
(C) Water potential
(D) Wall pressure.
14. The longest cell in animals is
(A) Blood cell
(B) Muscle cell Important
(C) Nerve cell
(D) Hepatocyte (liver cell).
15. Crossing over occurs during meiosis at
(A) Pachytene
(B) Diakinesis
(C) Leptotene
(D) Anaphase -I.
16. According to a cellular structure which one of the following is most complex?
(A) Algae
(B) Fungi
(C) Bacteria
(D) Protozoa.
17. In plants, the receptor for detecting photoperiod is
(A) Protein molecule
(B) Gradient of K+
(C) Sensory cell
(D) Sensory organelles.
18. Which one of the following is a protozoan?
(A) Yeast
(B) Variola
(C) Pea mosaic
(D) Entamoeba Hystolytica.
19. Which one is not a protozoan?
(A) Amoeba
(B) Paramoec
(C) Hydra
(D) Euglena.
20. The smallest size of a cell which can be seen with the unaided eye is
(A) 100 microns
(B) 1000 microns
(C) One micron
(D) 10 microns.
(A) Pteropus
(B) Lemur
(C) Talpa
(D) Echidna.
Correct Answer: [D] Echidna.
12. A plant cell shrinks when placed in
(A) A hypertonic solution
(B) A hypotonic solution
(C) Water
(D) A solution is isotonic with the cell sap.
Correct Answer: [A] A hypertonic solution.
13. Which of the following becomes zero in a fully turgid(রসস্ফীত) cell?
(A) Osmotic pressure
(B) All of the above
(C) Water potential
(D) Wall pressure.
Correct Answer: [A] Osmotic pressure.
14. The longest cell in animals is
(A) Blood cell
(B) Muscle cell Important
(C) Nerve cell
(D) Hepatocyte (liver cell).
Correct Answer: [C] Nerve cell.
15. Crossing over occurs during meiosis at
(A) Pachytene
(B) Diakinesis
(C) Leptotene
(D) Anaphase -I.
Correct Answer: [A] Pachytene.
16. According to a cellular structure which one of the following is most complex?
(A) Algae
(B) Fungi
(C) Bacteria
(D) Protozoa.
Correct Answer: [B] Fungi.
17. In plants, the receptor for detecting photoperiod is
(A) Protein molecule
(B) Gradient of K+
(C) Sensory cell
(D) Sensory organelles.
Correct Answer: [D] Sensory organelles.
18. Which one of the following is a protozoan?
(A) Yeast
(B) Variola
(C) Pea mosaic
(D) Entamoeba Hystolytica.
Correct Answer: [D] Entamoeba Hystolytica.
19. Which one is not a protozoan?
(A) Amoeba
(B) Paramoec
(C) Hydra
(D) Euglena.
Correct Answer: [C] Hydra.
20. The smallest size of a cell which can be seen with the unaided eye is
(A) 100 microns
(B) 1000 microns
(C) One micron
(D) 10 microns.
Correct Answer: [A] 100 microns.
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