NCERT Class-9 Science Solutions: Chapter 5-The Fundamental Unit Of Life Part 1

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Multiple Choice Questions

Question 1:

Which of the following can be made into crystal?

1. A Bacterium

2. An Amoeba

3. A Virus

4. A Sperm

Answer: C

Question 2:

A cell will swell up if

1. The concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium

2. The concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell

3. The concentration of water molecules is same in the cell and in the surrounding medium

4. Concentration of water molecules does not matter

Answer: B

Question 3:

Chromosomes are made up of

1. DNA

2. Protein

3. DNA and protein

4. RNA

Answer: C

Question 4:

Which of these options are not a function of Ribosomes?

1. It helps in manufacture of protein molecules

2. It helps in manufacture of enzymes

3. It helps in manufacture of hormones

4. It helps in manufacture of starch molecules

5. (i) and (ii)

6. (ii) and (iii)

7. (iii) and (iv)

8. (iv) and (i)

Answer: C

Question 5:

Which of these is not related to endoplasmic reticulum?

1. It behaves as transport channel for proteins between nucleus and cytoplasm

2. It transports materials between various regions in cytoplasm

3. It can be the site of energy generation

4. It can be the site for some biochemical activities of the cell

Answer: C

Question 6:

Following are a few definitions of osmosis

Read carefully and select the correct definition

1. Movement of water molecules from a region of higher concentration to a region of lower concentration through a semipermeable membrane

2. Movement of solvent molecules from its higher concentration to lower concentration

3. Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane

4. Movement of solute molecules from lower concentration to higher concentration of solution through a semipermeable membrane

Answer: A