9th Class Biology Full Book Paper

Q1. Multiple choice questions (Attempt all · 12 × 1 = 12)

1.  What is sucrose composed of?

   1.  Two glucose molecules

   2.  Two fructose molecules

   3. Glucose and fructose molecules

   4. Galactose and lactose molecules

2.  Which of the following tissue of stomach provide structural support:

   1.  Epithelial tissue 

   2. Connective tissue 

   3.  Muscular tissue 

   4. Glandular tissue 

3. The disease which has killed more people than any other disease is:

   1. AIDS 

   2. Hepatitis 

   3. Malaria 

   4. Typhoid

4. Viruses are assigned to the kingdoms:

   1. Plantae

   2. Protista

   3. Fungi

   4. Not include in any kingdom

5. Which of the following processes if used by plants to make oxygen during the process of photosynthesis?

   1. Intake of water

   2. Intake of CO₂

   3. Photolysis of water

   4. Calvin cycle

6. Female reproductive part of a flower is called:

   1. Androecium

   2. Gynoecium

   3. Calyx

   4. Corolla

7. Sucrose enters the sieve tubes of phloem by ......:

   1.  Passive transport 

   2. Osmosis 

   3. Diffusion 

   4. Active transport

8. lf is the value 155+160/2, then median of this value is:

   1. 157.5

   2. 157.6

   3. 157.7

   4. 157.9

9.  What happens when the pH changes for an enzyme?

   1. It increases the enzyme's activity

   2.  It alters the ionization of amino acids at the active site, slowing or blocking enzyme activity

   3. It strengthens the enzyme's bond with the substrate

   4. It increases the enzyme's temperature

10. Ribosomes are the sites of:

    1. Lipids synthesis 

    2.  Protein synthesis 

    3. Synthesis of sugars

    4.  Synthesis of nucleic acid 

11.  The number of chromosomes is maintained by:

    1. Mitosis 

    2. Meiosis 

    3. Budding 

    4. Fragmentation 

12. %age of the protein in dry mass of protoplasm:

    1. 18

    2. 15

    3. 50

    4. 10