Which statement regarding the biosynthesis of cholesterol is INCORRECT?
HMG-CoA reductase is the rate-limiting enzyme in cholesterol biosynthesis.
The process occurs primarily in the liver.
NADPH provides the reducing equivalents for the biosynthesis of cholesterol.
Oxygen is directly involved in the condensation of isoprene units to form squalene.
Related Questions
Which of the following is NOT a characteristic of essential fatty acids?
They are polyunsaturated fatty acids.
They are necessary for proper cell function.
They include linoleic acid and linolenic acid.
They can be synthesized by the human body.
Which component of a fat molecule contributes to its hydrophobic nature?
Glycerol backbone
Long hydrocarbon chains of fatty acids
Ester linkages
Phosphate group
Which statement regarding the biosynthesis of cholesterol is INCORRECT?
HMG-CoA reductase is the rate-limiting enzyme in cholesterol biosynthesis.
The process occurs primarily in the liver.
NADPH provides the reducing equivalents for the biosynthesis of cholesterol.
Oxygen is directly involved in the condensation of isoprene units to form squalene.
What is the primary function of waxes in plants?
Energy storage
Structural support
Prevent water loss
Cellular communication
Which property of lipids makes them suitable for long-term energy storage?
Solubility in water
High caloric density
Presence of nitrogen
Structural role in cell membranes
A fatty acid has a carboxyl group attached to R group. The R group could be a
Methyl
Ethyl
Higher number of groups (1 to 19 carbons)
All of the above
All of the following are examples of polymers EXCEPT:
Enzymes
DNA
Starch
Triglycerides
Why does gingely oil remain liquid at lower temperatures, unlike some other oils?
It is rich in saturated fatty acids.
It has a high melting point.
It is composed primarily of phospholipids.
It is rich in unsaturated fatty acids with lower melting points.
Lipids are generally
I. water soluble
II. water insoluble
III. soluble in non-polar organic solvents
IV. not soluble in non-polar organic solvents
Choose the correct options
Only I
II and III
II and IV
Only IV
Which component of lecithin contributes to its amphipathic nature, allowing it to form bilayers in cell membranes?
Glycerol backbone only
Fatty acid chains only
Phosphate group only
Phosphate group and fatty acid chains
