The lipid component of the membrane mainly consists of

  • phosphoglycerides

  • triglycerides

  • monoglycerides

  • Both B and C

In membranes, the lipids are arranged within the membrane with the ______heads towards the outer sides and the _________ tails towards the inner part.

  • polar, charged

  • polar, hydrophobic

  • polar, nonpolar

  • Both B and C

Which of the following biomolecules is not the part of membrane?

  • Nucleic Acid

  • Proteins

  • Lipids

  • Carbohydrates

Which one is true for the cell membrane

  • The ratio of lipids and proteins is fixed in membranes

  • The amount of carbohydrates is greater than other biomolecules

  • In human erythrocytes amount of protein is more than that of lipids

  • All of the above

Integral or Peripheral proteins classification is based on

  • protein size

  • ease of extraction

  • ease of function

  • ease of study

The most improved model of the structure of the cell membrane is

  • Fluid membrane model

  • Fluid mosaic model

  • Sandwich model

  • unit membrane model

Lateral movement of which of the following biomolecules takes place within the overall bilayer

  • lipids

  • carbohydrates

  • proteins

  • Both A and C

The ability to move within the membrane is measured as its

  • liquidity

  • fluidity

  • viscosity

  • stability

The fluid nature of the membrane is also important from the point of view of functions like

  • cell growth

  • secretion

  • cell division

  • All of the above

The most important function of plasma membrane is the

  • transportation of molecules across it

  • cell division

  • cell growth

  • endocytosis

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

  • active and passive respectively

  • passive and active respectively

  • uphill and downhill respectively

  • Both A and C

In membranes carrier proteins are required for

  • nonpolar molecules

  • polar molecules

  • charged molecules

  • Both B and C

The movement of water across membranes is from

  • higher to lower concentration of water

  • lower to higher concentration water

  • outside of the cell to its inside

  • Both A and C

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

  • transport against the concentration gradient

  • active process

  • passive process

  • Both A and B

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

  • Diffusion

  • Osmosis

  • Active transport

  • Both A and B

Which of the following statement is not true?

  • Plasma membrane is selectively permeable

  • Polar molecules cannot pass through the polar lipid bilayer

  • Neutral molecules pass the membranes through diffusion

  • Active transport is exhibited with the expenditure of ATP

Which of the following is the part of the Endomembrane system

  • Endoplasmic reticulum, golgi complex, lysosomes and vacuoles

  • Golgi complex and ER only

  • Endoplasmic reticulum, golgi complex, and vacuoles

  • Nucleus, Endoplasmic reticulum, golgi complex, and vacuoles

Which of the following is  present in matrix of mitochondria

  • ribosomes

  • RNA

  • DNA

  • All of the above

Cristae is formed through

  • infoldings of inner membrane

  • infoldings of outer membrane

  • through deposition of intracellular lipids

  • All of the above

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
  • 1
  • 2
  • 3
  • 4

Endomembrane system is formed because of the

  • coordinated functions of the membranous organelles

  • coordinated functions of the membraneless organelles

  • coordinated functions of all cell organelles

  • All of these

Which of the following is true for lysosomes

  • membrane bound vesicles

  • formed by golgibody

  • rich in hydrolytic enzymes

  • All of the above

Hydolytic enzymes comprises of which of the following

  • carbohydrases

  • lipases

  • proteases

  • All of these

Hydrolytic enzymes are active at

  • acidic pH

  • basic pH

  • Neutral pH

  • Both A and B

How many of the following biomolecules can be digested by lysosomes?

(Carbohydrates, proteins, lipids, nucleic acids)

(1)4

(2)3

(3)2

(4)1
  • 1
  • 2
  • 3
  • 4

Which of the following is not true about cell wall

  • protects cell from mechanical damage

  • permeable to water

  • It’s a living structure

  • absent in animals

Galactans and mannans are the important component of cell wall of

  • Plant

  • Algae

  • Fungi

  • Bacteria

The common component between the cell wall of algae and plants is

  • cellulose

  • Hemicellulose

  • Both A and B

  • Mannans

Which of the following cell wall comes early and disappears gradually in the life of plant?

  • primary cell wall

  • secondary cell wall

  • tertiary cell wall

  • Both A and B

Which of the following holds the neighbouring cells together

  • calcium pectate

  • sodium pectate

  • Both A and B

  • manganese pectate

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