CBSE Class 9 Science The Fundamental Unit of Life Sure Shot Questions B

Question. Mitochondria stores energy in from of
(A) Heat energy
(B) ATP
(C) light energy
(D) none of the above
Answer : B

Question. Which of the following is called as ‘Suicidal bags’ ?
(A) Centrosome
(B) Lysosome
(C) Microsome
(D) Mesosomes
Answer : B

Question. Which of the following organelle is the site of Kreb cycle?
(A) Ribosome’s
(B) Lysosomes
(C) eukaryotic cells
(D) Nucleus
Answer : C

Question. Mitochondria are absent in
(A) Prokaryotic cells
(B) RBC of mammals
(C) eukaryotic cells
(D) (A) and (B) Both
Answer : D

Question. Eukaryotic ribosomes are
(A) 30s
(B) 50s
(C) 80s
(D) 70s
Answer : C

Question. Tonoplast is the membrane surrounding the
(A) cytoplasm
(B) vacuole
(C) nucleus
(D) mitochondria
Answer : B

Question. The ATP synthesizing units of Mitochondria are
(A) Oxysomes
(B) peroxysomes
(C) glyoxysomes
(D) lysosomes
Answer : A

Question. What is more abundant in smooth endoplasmic reticulum?
(A) Cistemae and vesicle
(B) Tubules
(B) Tubules and vesicles
(C) Cistemae
Answer : B

Question. Mitochondria are concerned with
(A) Kreb cycle
(B) C, cycle
(C) glycolysis
(D) none of the above
Answer : A

Question. Lipid synthesis is performed by
(A) Rough ER
(B) smooth ER
(C) both of above
(D) none of the above
Answer : B

Question. Who observed Mitochondria at first?
(A) Porter
(B) Palade
(C) Koliker
(D) Camilo Golgi
Answer : C

Question. Striking difference between a plant cell and an animal cell is due to the presence
(A) mitochondria
(B) plasma membrane
(C) cell wall
(D) ribosome
Answer : C

Question. In prokaryotic cell
(A) nucleus is developed
(B) membrane bounded organelles are present
(C) double membrane bounded organelles are absent
(D) none of these
Answer : C

Question. Lysosomes are responsible for
(A) protein synthesis
(B) digestion of organic molecules
(C) fat synthesis
(D) fat emulsification
Answer : B

Question. Plastids that are white in colour (Pigment free)
(A) chloroplast
(B) lysosome
(C) leucoplast
(D) Chromoplast
Answer : C

Question. A typical plant cell contains
(A) cell well
(B) plastids
(C) large vacuole
(D) all of the above
Answer : D

THE FUNDAMENTAL UNIT OF LIFE 

1. Who expanded cell theory by suggesting that all cells arise from pre-existing cells?

2. In which year electron microscope was invented?

3. Name the book in which Robert Hooke published his observations about cork cells.

4. Who discovered nucleus in the cell?

5. Name the two postulates of the cell theory.

6. Who coined the term 'protoplasm'?

7. Name the largest cell?

8. Name the world's smallest cell.

9. Name the smallest cell in human body.

10. Name the biggest cell in human body.

11. Name the longest cell in human body.

12. Name the cell in human body which cannot reproduce.

13. Give an example of anucleate cell i.e. cell without nucleus.

14. Give an example of cells containing two nuclei (Binucleate).

15. Give examples of cells which are muti-nucleate (i.e. having many nuclei).

16. What is the plasma membrane composed of?

17. Who proposed fluid-mosaic model of cell or plasma membrane?

18. Is plasma membrane permeable or selectively permeable?

19. What are different types transport of components across cell membrane?

20. Define Passive Transport.

21. What is diffusion?

22. Define Osmosis. What are different types of osmosis? Give examples of osmosis.

23. What is plasmolysis?

24. What would happen if the plasma membrane ruptures or breaks down?

25. What do you mean by Endocytosis? How does an Amoeba obtain its food?

26. Define Exocytosis.

27. Why are lysosomes known as suicide bags?

28. What happens to a cell (plant cell or animal cell) when placed in the following solutions:

(a) Hypotonic solution

(b) Isotonic solution

(c) Hypertonic solution

29. Place a de-shelled egg in water for five minutes. What do you observe? (Note: De-shelled egg means,the shell of an egg is removed by dissolving it in dilute hydrochloric acid. The shell is mostly calcium carbonate. A thin outer skin now encloses the egg.)
What will happen if a de-shelled egg in a concentrated salt solution for 5 minutes?

30. Put dried raisins in plain water and leave them for some time. Then place them in concentrated solution of sugar or salt. What do you observe in both cases?

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