VACOULE

Question 1

What are the vacuoles ?

Answer 1

1. They are the characteristic feature of the plant cell.
2. Non-protoplasmic body.
3. No metabolic activity

Question 2

What are the types of vacuoles ?

Answer 2

1. Sap vacuoles
2. Contractile vacuole
3. Food vacuole

Question 3

What are sap vacuole ?

Answer 3

1. They are only present in the plant cell except the meristematic cells.
2. It occupies the 90% of the total volume of plant cell

Question 4

What is the feature of the membrane of the sap vacuole ?

Answer 4

1. Single layer (tonoblast)

2. Semi-permeable acc to NCERT but actually they are selectively permeable.

Question 5

What is the function of the tonoblast in the sap vacuole ?

Answer 5

Tonoblast facilitates the transport of number of the ion (polar) against the concentration gradient inside the vacuole.

Question 6

VACUOLE is also known as what and why ?

Answer 6

Vacuole is also known as the dustbin of the cells because it store the reserve food and waste of the cell

Question 7

What is stored by the sap vacuole ?

Answer 7

It store various pigments , latex , minerals , CaCO3

Pigments like -

1. Anthocyanin - blue or purple
2. Anthoxanthin - yellow or white
   
   • Both are water soluble pigments

Question 8

What are the contractile vacuole ?

Answer 8

1. They are found in aquatic protist like amoeba

2. Helps in osmoregulation

Question 9

What are the food vacuole ?

Answer 9

1. Found in amoeba

2. Due to the engulfment of food by pseudopodia

Question 10

What are the gas vacuole ?

Answer 10

1. Found in the BGA , purple and green Sulphur bacteria

2. Helps in providing buoyancy to the cell