02.05 - Review of Lipids Flashcards
Which is not a physiologic function of lipids?
a. Coenzymes
b. Inflammatory mediators
c. Hydrophilic barrier in cell membranes
d. Major source of energy
c. Hydrophilic barrier in cell membranes
What do you the esters of fatty acids with glycerol in the solid state?
Fats
These are esters of fatty acids with glycerol in the liquid state.
Oils
__________ are esters of fatty acids with higher molecular weight monohydric alcohols.
Waxes
_____________ are esters of fatty acids with alcohol and another group.
Complex lipids
____________ are fatty acids + alcohol + phosphoric acid residue.
Phospholipids
_____________ are fatty acids + sphingosine + carbohydrates.
Glycolipids
Which of the following statements is incorrect?
a. Simple lipids are esters of fatty acids with various alcohols.
b. Phospholipids frequently have N-containing groups.
c. Glycolipids are also known as glycosphingoslipids.
d. None of the above.
d. None of the above.
Which is not an example of a derived lipid?
a. Fatty acids
b. Steroids
c. Ketone bodies
d. Lipoproteins
d. Lipoproteins (Lipoproteins are complex lipids).
These are lipids that are technically long chains of carboxylic acids (-COOH).
Fatty acids
A saturated fatty acid has ________ double bonds
Zero
Which of the following statements is correct?
a. Saturated fatty acids have geometric isomerism: a cis and a trans form.
b. Saturated fatty acids reduces the risk for atherosclerosis.
c. Cis fatty acids are easier to pack because of kinks and bends.
d. Monounsaturated fatty acids will not cause plaque build-up around artery walls.
d. Monounsaturated fatty acids will not cause plaque build-up around artery walls.
A very long fatty acid is expected to have:
a. Decreased fluidity
b. Decreased melting point
c. Less hydrophobic interactions
d. None of the above
a. Decreased fluidity
The melting point of a fatty acid is expected to increase with:
a. Decreasing chain length
b. Increasing fluidity
c. Increasing saturation
d. Increasing double bonds
c. Increasing saturation
A cis,cis delta-9, delta-12 fatty acid has:
a. a double bond between carbon 8 and 9
b. three double bonds
c. A and B
d. None of the above
d. None of the above
Where would you expect to find the double bond in an omega-6 fatty acid?
a. 6th carbon-oxygen bond
from the terminal methyl carbon
b. 6th carbon-carbon bond from the terminal methyl carbon
c. 6th carbon-oxygen bond from the terminal carbonyl carbon
d. 6th carbon-carbon bond from the terminal carbonyl carbon
b. 6th carbon-carbon bond from the terminal methyl carbon
Which of the following describes the fatty acid named as 18:3 (9, 12, 15)
a. It has two double bonds between carbons 3 and 18.
b. It has 18 carbons with 9 double bonds.
c. It has 18 double bonds.
d. There are two carbons between one double bond and the terminal methyl carbon.
d. There are two carbons between one double bond and the terminal methyl carbon. (C15 has a double bond; C16 and C17 are between C15 and the terminal C18.)
What is the common name of the omega-6 fatty acid?
Linoleic acid
What is the common name of the omega-3 fatty acid?
Linolenic acid
What is the most commonly synthesised fatty acid?
Palmitic acid
What is the precursor of archidonic acid?
Linoleic acid
What is the intermediary fatty acid between carbohydrates and triglycerides in lipogenesis?
Palmitic acid