Question

24. phosphatidylcholine, phosphatidylininostol are all present in the plasma membran. they are the example of ----

a. phosphatidylininostol signaling components

b. hydrophobic membrane lipids

c. amphipathic membrane lipids

d. phospholipids that are distributed evenly in the inner and outer leaflets of the membrane.

25. an enzyme-catalyzed reaction proceeds at a faster rate than an uncatalyzed reaction because the enzyme lowers the difference in free energy between reactants and the products.

true

false

Answer 1

24)

Amphipathic membrane lipid

Phosphatidylcholine and phosphatidylinositol are the example of phospholipid which are amphipathic in nature with a hydrophobic tail and hydrophilic head.

Phosphatidylcholine is present in inner membrane and phosphatidylinositol is present in outer membrane.

Phosphatidylinositol play an important role in phosphatidylinositol signalling not phosphatidylcholine.

25) true

Enzyme lowers the activation energy of the reaction as a result reaction occur at a faster rate.

Activation energy is the difference between the free energy of the reactants and free energy of the product.