In 70S, S is

(1)sedimentation coefficient

(2)indirect measure of density and size

(3)indirect measure of mass and size

(4)Both A and B

Which of the following are the functions of cytoskeleton?

1. mechanical support

2. motility

3. maintenance of the shape of the cell

4. all of the above

Which of the following is true about centrosome

(1)membraneless organelle

(2)contains two centrioles

(3)surrounded by amorphous pericentriolar

(4)All of these

Which of the following is true about centrioles?

(1)It lacks microtubule in the centre

(2)Hub is proteinaceous

(3)It forms the body of cilia or flagella and spindle fibres

(4)All of the above

Which of the following is true for vacuole

(1)It is present in both plants and animals

(2)Central vacuole is present in plant

(3)It occupies 90% volume of the plants

(4)All of these

In plant cell the concentration of ions is more in

(1)cytoplasm

(2)vacuoles

(3)equal in both

(4)nucleus

The contractile vacuole

The membrane of vacuole is called

1. plasma membrane

2. tonoplast

3. cytoplasm

4. tunicates

Which of  the following is true about mitochondria except

1. Semi-autonomous organelle

2. Compartmentalisation is present

3. Matrix contain 80s ribosomes

4. Both 1 and 2

Which of the following is  present in matrix of mitochondria

1. ribosomes

2. RNA

3. DNA

4. All of the above