The most important function of plasma membrane is the

(1) transportation of molecules across it

(2)cell division

(3)cell growth

(4)endocytosis

The movement of molecules with and without requirement of energy are called as

(1)active and passive respectively

(2)passive and active respectively

(3)uphill and downhill respectively

(4)Both A and C

In membranes carrier proteins are required for

(1)nonpolar molecules

(2)polar molecules

(3)charged molecules

(4)Both B and C

The movement of water across membranes is from

(1)higher to lower concentration of water

(2)lower to higher concentration water

(3)outside of the cell to its inside

(4)Both A and C

The transport of sodium and potassium ions through the membranes is an example of

(1)transport against the concentration gradient

(2)active process

(3)passive process

(4)Both A and B

In which of the following processes the movement of substance takes place along the concentration gradient

(1)Diffusion

(2)Osmosis

(3)Active transport

(4)Both A and B

Which of the following statement is not true?

(1)Plasma membrane is selectively permeable

(2)Polar molecules cannot pass through the polar lipid bilayer

(3)Neutral molecules pass the membranes through diffusion

(4)Active transport is exhibited with the expenditure of ATP

Which of the following is the part of the Endomembrane system

(1)Endoplasmic reticulum, golgi complex, lysosomes and vacuoles

(2)Golgi complex and ER only

(3) Endoplasmic reticulum, golgi complex, and vacuoles

(4) Nucleus, Endoplasmic reticulum, golgi complex, and vacuoles

How many of the following are not the part of Endomembrane System

Endoplasmic reticulum, golgi complex, lysosomes and vacuoles, mitochondria, chloroplast, Nucleus, Peroxisomes

(1)5

(2)6

(3)4

(4)3

Endomembrane system is formed because of the

(1) coordinated functions of the membranous organelles

(2) coordinated functions of the membraneless organelles

(3) coordinated functions of all cell organelles

(4)All of these