Which lipid acts as a precursor for both prostaglandins and leukotrienes?
Linoleic acid
Palmitic acid
Arachidonic acid
Oleic acid
Related Questions
Tay-Sachs disease is caused by a deficiency in the enzyme hexosaminidase A. This leads to the accumulation of which lipid in the brain?
Cerebroside
Sphingomyelin
GM2 ganglioside
Phosphatidylcholine
A lipid molecule formed by the esterification of glycerol with three fatty acids is known as a:
Monoglyceride
Diglyceride
Triglyceride
Phospholipid
Which of the following correctly describes the solubility of lipids?
Soluble in water, insoluble in organic solvents
Insoluble in water, soluble in organic solvents like ether and chloroform
Soluble in both water and organic solvents
Insoluble in both water and organic solvents
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.
Which type of bond is characteristic of saturated fatty acids?
C=C
CC
C-O
C-C
Which lipid acts as a precursor for both prostaglandins and leukotrienes?
Linoleic acid
Palmitic acid
Arachidonic acid
Oleic acid
Which of the following lipid modifications is NOT typically found in integral membrane proteins?
Palmitoylation
Myristoylation
Prenylation
Glycosylphosphatidylinositol (GPI) anchor
A rare genetic disorder affects lipid metabolism by impairing the synthesis of plasmalogens. Which membrane component would be MOST directly affected?
Mitochondrial inner membrane
Nuclear envelope
Myelin Sheath
Lysosomal membrane
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.
Which of the following is NOT a function of cardiolipin?
Stabilizing the structure of respiratory chain complexes
Facilitating mitochondrial cristae formation
Major component of cell membrane fluidity
Apoptosis regulation
