S.3 BIO lesson 4

Q.1 One of the key features of the cell membrane is the ___________________.

• A. partial permeability

• B. differential permeability

• C. full permeability

• D. free permeability

Q.2 Polarity of molecule is due to the ___________________.

• A. equal sharing of bonding electrons

• B. protons shared by atoms

• C. unequal distribution of charge

• D. electrons random movement

Q.3 The main component of the cell membrane is _______________.

• A. electron

• B. polar molecules

• C. protons

• D. phospholipid molecule

Q.4 Cell membrane allows______________ to pass through.

• A. oxygen and carbon dioxide

• B. big molecules

• C. only water molecules

• D. all molecules

Q.5 Polar molecules and ions has to pass through the _____________ of the cell membrane.

• A. special channel protein or carrier protein

• B. phospholipid bilayer

• C. hydrophilic head

• D. hydrophobic tail

Q.6 Name the model.

• Mosaic protein model

• B. Fluid model

• C. Fluid mosaic model

• D. protein model

P and Q are?

• A.P-protein, Q-phospholipid

• B.P-phospholipid, Q- protein

• C.P-lipid, Q-fat

What substances can pass through the channel protein?

• A. small polar molecules and ions

• B. water and large molecules

• C. ions and non-polar molecules

• D. water and non-polar molecules

Another term used to describe the hydrophilic head is

• A. water loving

• B. water hating

• C. water repelling

• D. ions hating