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BCCB2000 Lecture 11 Questions Study Set Exam
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BCCB2000 Lecture 11 QuestionsStudy Set Exam
The components of a triacyglycerol include one, or more, of the following:
A. glycerol
B. fatty acid
C. sphingosine
D. phosphate - Answer B. fatty acid
C. sphingosine
Which of the following statements about partial hydrogenation are correct?
A. Partial hydrogenation converts some of all of the cis double bonds in a vegetable oil
to single bonds. This decreases the melting point of the lipid and makes it more 'solid'.
B. Partial hydrogenation converts some of the trans double bonds in a vegetable oil to
cis double bonds. This increases the melting point of the lipid and makes it more 'solid'.
C. Partial hydrogenation converts some of the cis double bonds in a vegetable oil to
trans double bonds. This increases the melting point of the lipid and makes it more
'solid'.
D. Partial hydrogenation converts some of the cis double bonds in a vegetable oil to
trans single bonds. This decreases the melting point of the lipid and makes it more
liquid. - Answer C. Partial hydrogenation converts some of the cis double bonds in a
vegetable oil to trans double bonds. This increases the melting point of the lipid and
makes it more 'solid'.
Phosphatidylinositol is:
A. isoprenoids that must be obtained from the diet
B. intracellular messengers that are components of the plasma membrane
C. steroid hormones that are produced in one tissue for an effect on another tissue
D. fatty acid derivatives that act on tissues in which they are synthesised - Answer B.
intracellular messengers that are components of the plasma membrane
Which of the following best describes the cholesterol molecule?
, A. amphipathic
B. polar, uncharged
C. nonpolar, charged
D. nonpolar, uncharged
E. polar, charged - Answer A. amphipathic
Coconut oil contains only a small amount of unsaturated fat but it still has a relatively
low melting point because it contains mostly:
A. long-chain fatty acids
B. cholesterol
C. polyunsaturated fats
D. short-chain fatty acids - Answer D. short-chain fatty acids
Triacylglycerols cannot form lipid bilayers because they:
A. have hydrophobic tails.
B. do not have polar heads
C. cannot associate with cholesterol.
D. have polar heads.
E. cannot engage in hydrophobic interactions - Answer B. do not have polar heads
Lipids can be generally classified as (more than one option may apply):
A. specific action lipids
B. tissue lipids
C. fatty lipids
D. membrane lipids
E. storage lipids
F. dietary lipids - Answer A. specific action lipids
D. membrane lipids
E. storage lipids
Trans fatty acids have physical properties like those of:
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