Which of the following lipid modifications is NOT typically found in integral membrane proteins?
Palmitoylation
Myristoylation
Prenylation
Glycosylphosphatidylinositol (GPI) anchor
Related Questions
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
Choose a primary metabolite with phosphorylated organic compound in its structure.
Palmitic acid
Ribose
Cholesterol
Lecithin
Which of these biomolecules does NOT have a polymeric structure?
Proteins
DNA
Polysaccharides
Lipids
Which of the following biological roles is primarily associated with lecithin, a low molecular weight organic compound found in cell membranes?
Energy storage
Maintaining cell membrane structure
Catalyzing enzymatic reactions
Genetic information storage
Which of the following best describes the composition of a triglyceride?
One glucose molecule and three fatty acids.
One glycerol molecule and three fatty acids.
Three glycerol molecules and one fatty acid.
One glucose molecule and three amino acids.
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 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
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
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.
