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Bond Multiple Choice Questions

Indicate the number of possible stereoisomers for a linear aldopentose?
a.4
b.8
c.12
d.16

What statement in incorrect about the following pairs of sugars?
a. Galactose and mannose are diastereomers
b. L-galactose and D-galactose are enantiomers
c. Glyceraldehyde and dihydroxyactone are stereisomers
d. Gulcose has more chirl carbons than fructose

Which of the following sugars is classified as a ketose?
a. Galactose
b. Mannose
c. Fructose
d. Erythose

What disaccharide contains this molecule as a component?
a. Maltose
b. Celloboise
c. Lactose
d. Sucrose

Which of the following molecules cannot undergo mutarotation?
a. Glucose
b. Erythrose
c. Fructose
d. Ribose

Which of the following is a characteristic of sugar alcohols?
a. Can be prepared by the mild oxidation of an aldose.
b. Can spontaneously form intramolecular hemiacetals
c. Are classified as alditols
d. Two of the above

Which of the functions listed below is not a primary function for polysaccharides?
a. Structual components
b. Engery storage molecules
c. Protective substances
d. Hormone receptors

Which molecule is not a glycosaminoglycan?
a. Heprin
b. Chondroitin-4-sulfate
c. Keratan sulfate
d. Chitin

Which of the following molecules is not amphipatic?
a. Cholesterol
b. Succinate
c. Oleic acid
d. Phosphatidylcholine

Which is a property of cholesterol esters and triacylglcerols?
a. They are more polar than phosphatidylcholine
b. They can be classified as amphipathic molecules
c. They are components of plasma membranes
d. They are carried in serum as complexes with proteins

Which of the following features is not found in a triacylglyceride, such as trimyristoylglycerol?
a. The molecule contains a chirl carbon
b. Insoluble in water
c. Soluable in organic solvent, such as benzene
d. Found primarily in adipose tissue

The reaction of a fatty acid with cholesterol produces what type of linkage and at what ring position in cholesterol?
a. Amide, aC-15
b. Ester, atC-3
c. Thiol ester, at C-26
d. Ester, at C-19

Which molecule or class of molecules is not derived from cholesterol?
a. Prostaglandins
b. Aldosterone
c. Glucocorticoids
d. Cholic acid

Which of the following statements is incorrect about glycerophospholipids isolated from erythrocyte membrane?
a. The net charge on phosphatidylchlorine is more postive than on phosphatidyl serine at pH7.0
b. They are amphiapathic molecules.
c. All the phosphatidylcholine molecules have the same molecular weight.
d. These lipids include phosphatidylcholine, phosphatidylserine,phosphatidylinositol, and phosphatidylethanolarnine.

Acid hydrolysis will break all ester, amide and acetal chemical linkage, which is not true about acid hydrolysis of various lipids?
a. A cerebroside will release two fatty acids and one monosaccharide per mole of cerebroside.
Phosphatidyl choline will release two fatty acids and one glycerol molecule per molecule of phosphatidylcholine.
c. Cerebrosides and sphingomyelin will release one mole of sphingosine.

Solution Preview

Indicate the number of possible stereoisomers for a linear aldopentose?
b. 8 (D-ribose, D-arabinose, D-xylose, D-lyxose, and all of their L-isomers) There are 3 chiral carbons in a linear aldopentose, therefore, there are 2^3=8 stereoisomers

What statement in incorrect about the following pairs of sugars?
c. Glyceraldehyde and dihydroxyactone are stereisomers

Which of the following sugars is classified as a ketose?
c. Fructose

What disaccharide contains this molecule (fructose?) as a component?
d. Sucrose (it's made of fructose and glucose)

Which of the ...

Solution Summary

This answers several multiple choice questions on bonds.

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