which is a phosphorylation reaction

Which statement is true for the following reaction?

A) NAD+ is oxidized
B) NAD+ is reduced
C) Ethanol is reduced
D) NADH is oxidized

2. Which is a phosphorylation reaction?
A)

B)

C)
D)

3. Which of the following structures represents an α-monosaccharide that involve a 6-membered ring?
A) B) C) D)

4. Which of the following monosaccharides has an open chain form that is a ketose?
A) B) C) D)

5. Which of the following statement is true for the following molecule?

A) The linkage between the two rings is α(1→4)-glycoside linkage.
B) Both the two rings have D form in open chain structure.
C) One ring is 5-membered and the other ring 6-membered.
D) The molecule has an acetal group.

6. Which molecule has four chiral centers?

a) b) c ) d)

7-Which statement is true?
A) Complete hydrolysis of lactose will produce two identical molecules.
B) Both open and cyclic forms of glucose contain the same number of chiral carbons.
C) Complete hydrolysis of sucrose will produce two identical molecules.
D) Complete hydrolysis of starch will produce the same molecule

8-Which polysaccharide has two types of glycosidic linkages?
A) Amylose
B) Amylopectin
C) Cellulose
D) Heparin

9-Which is a monosaccharide?
A) Lactose
B) Maltose
C) Sucrose
D) Galactose

10-Which statement is not true?
A) Anomers are the α and β forms of cyclic monosaccharides.
B) An aldohexose is a C6 sugar with –CHO in the C1 position.
C) a dicaccharide with a hemiacetal is a reducing sugar.
D) Amylose has α(1→6) glycosidic linkages.

11-Which statement is Not True?
A) A monosaccharide cannot be hydrolyzed to smaller units
B) A reducing sugar gives a precipitate of silver metal with Benedict’s reagent.
C) The product of oxidation of an aldose is a carboxylic acid.
D) Fructose is the sweetest carbohydrate found in fruit juices and honey.

12-The sum of all the biochemical reactions occurring in an organism is
A) anabolism.
B) catabolism.
C) digestion.
D) metabolism.

13-The hydrolysis of ATP to ADP ________ 7 kcal/mol of energy and is an ________ reaction.
A) releases; endergonic
B) consumes; exergonic
C) releases; exergonic
D) consumes; endergonic

14-Which of the following does not undergo oxidation-reduction reactions?
A) ATP
B) NADH
C) NADPH
D) FAD

15-Which reaction of the citric acid cycle involves the addition of water across the double bond?
A) conversion of isocitrate to α-ketoglutarate
B) conversion of succinate to fumarate
C) conversion of malate to oxaloacetate
D) conversion of fumarate to malate

 
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