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Biochemistry lipids 2 quiz
Quiz for Dr. Eman lipids 2 lecture
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Which of following is the least polar/ most hydrophobic?
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1 point
Glycerol
Phosphatidic acid
TAG
MAG
Palmitic acid
What is a common characteristic between glycerophospholipids and TAG?
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1 point
They both function as secondary messengers
They both contain glycerol and fatty acids
They both are intermediates for DAG
They are both completely hydrophobic
They both can be broken down by the enzyme phospholipase C
Which of the following is incorrect about DAG?
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1 point
It is less hydrophobic than TAG
It functions as a secondary messenger
It is one of the products of phospholipase C
It has an ether link in SN-1
It consists of a glycerol molecule linked with two fatty acids
Which of the following is incorrect about phospholipids?
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1 point
Their amount varies with starvation
They are the major component of all cell membranes
They form micelles in water
They have a hydrophilic head and a hydrophobic tail
They are components of lipoproteins
Which of the following may contain choline as a base?
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1 point
Lecithin
Lysolecithin
Plasmalogens
All of the answers above
None of the answers above
Which of the following is incorrectly matched regarding the mentioned glycerophospholipid?
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1 point
Lecithin --> most abundant glycerophospholipid
Phosphatidyl serine --> plays a role in programmed cell death
Cardiolipin --> found in the membrane of mitochondria
Plasmalogens --> have ether link on sn-1 position rather than an ester bond
Phosphatidic acid --> has serine as the base that is linked to phosphate
All of the following are glycerophospholipids that are correctly matched to a linked disease except?
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1 point
Dipalmitoyl lecithin is linked to infant respiratory distress syndrome
An increase in cardiolipin is linked to mitochondrial dysfunction
A decrease in plasmalogens is linked to Alzheimer disease
All of the above are correctly matched
None of the above is correctly matched
What glycerophospholipid gives two secondary messengers when broken down?
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1 point
Lipositol
Cardiolipin
Cephalin
Phosphatidyl inositol 4,5-biphosphate
Phosphatidyl serine
What results from the action of phospholipase A2 on cephalin?
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1 point
Lysocephalin
A blood clotting factor
Ethanolamine
DAG
A saturated fatty acid
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