Biochemistry Portion of CHEM1031 Final

Classify the following sugar as an aldose or ketose and give the number of carbons present.

• aldose, 5

• ketose, 6

• aldose, 6

• ketose, 5

How many chiral carbons are in the following sugar?

• 6

• 4

• 3

• 5

Classify the following sugar in the D or L form

• D

• L

What is the product of the reduction of the following sugar:

• 
• 

Identify the type of glycosidic bond:

• β-1,4 glycosidic bond

• α-1,6 glycosidic bond

• β-1,6 glycosidic bond

• α-1,4 glycosidic bond

What is a polymer of glucose that is stored in the liver and muscle of animals?

• cellulose

• glycogen

• amylose

• amylopectin

True or False: the structure of amylopectin is a straight-chain polysaccharide of glucose units.

• true

• false

Answer explanation

Amylopectin is a polymer of glucose or polysaccharide formed by plants as an energy storage molecule

What is the major structural unit of wood ?

• cellulose

• amylose

• amylopectin

• glucose

Which lipid(s) are hydrolyzable?

• steriods

• fat-soluble vitamins

• waxes

• all of the above

Answer explanation

Waxes, glycolipids, phospholipids, and neutral waxes are hydrolyzable lipids

What reaction makes a wax?

• hydrogenation

• hydrolysis

• saponification

• Esterification