CBSE Class 9 Science The Fundamental Unit of Life Quiz 1

1. Which of the following can be made into crystal?

A A bacterium B An Amoeba C A virus D A sperm

2. A cell will swell up if

A the concentration of water molecules in the cell is higher than the concentration of water molecules in the surrounding medium. B the concentration of water molecules in the surrounding medium is higher than water molecules concentration in the cell. C the concentration of water molecules is same in the cell and in the surrounding medium. D concentration of water molecules does not matter.

3. Chromosomes are made up of

A DNA B Protein C DNA and protein D RNA

4. Which of these is not related to endoplasmic reticulum?

A It behaves as a transport channel for proteins between nucleus and cytoplasm. B It transports materials between various regions in the cytoplasm. C It can be the site of energy generation. D It can be the site for some biochemical activities of the cell.

5. Following are a few definitions of osmosis:

A Movement of water molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane. B Movement of solvent molecules from its higher concentration to lower concentration. C Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane. D Movement of solute molecules from lower concentration to higher concentration of solution through a semi permeable membrane.

6. Plasmolysis in a plant cell is defined as

A breakdown (lysis) of plasma membrane in hypotonie medium B shrinkageof cytoplasm in hypertonic medium C shrinkage of nucleoplasm D none of them

7. Which of the following are covered by a single membrane?

A Mitochondria B Vacuole C Lysosome D Plastid

8. Find out the false sentence.

A Nucleus is involved with the formation of lysosomes. B Nucleus, mitochondria and plastid have DNA, hence they are able to make their own structural proteins. C Mitochondria is said to be the power house of the cell as ATP is generated in them. D Cytoplasm is called as protoplasm.

9. Find out the correct sentence.

A Enzymes packed in lysosomes are made through RER (rough endoplasmic reticulum). B Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively. C Endoplasmic reticulum is rélated to the destruction of plasma membrane. D Nucleoid is present inside the nucleoplasm of eukaryotic nucleus.

10. Which cell organelle plays a crucial role in detoxifring many poisons and drugs in a cell?

A Golgi apparatus B Lysosomes C Smooth endoplasmic reticulum D Vacuoles