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 is true about ribosomes

(1)It’s a membraneless structure

(2)70s and 80s are composed of 2 subunits

(3)70s is also present in chloroplast

(4)All of these

Cytoskeleton comprises of

(1)Microtubule

(2)Microfilament

(3)Intermediate filament

(4)All of the these

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

Cytoskeleton is made up of

(1)Proteins

(2)carbohydrates

(3)lipids

(4)All of these

Cilia and flagella are

(1)microtubule

(2)microfilament

(3)intermediate filament

(4)Both A and B

Which of the following is not true about cilia and flagella

(1)Both help in locomotion

(2)cilia is shorter and flagella is longer

(3)Flagella works like Oars

(4)hair-like outgrowths of the cell membrane

How many of the following structures are synthesised by microtubules?

Centrioles, basal body, cilia, flagella, spindle fibres

(1)5

(2)4

(3)3

(4)2

Which of the following is the structural and functional unit of bacterial flagella and cilia

(1)axon

(2)axoneme

(3)flagellin

(4)All of the above

Which of the following is true about axoneme except

(1) It has nine doublets of peripheral microtubules

(2)2 centrally located microtubule

(3)nine radial spokes

(4)central sheath is absent