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Carbohydrate Online Exam Quiz

Important questions about Carbohydrate. Carbohydrate MCQ questions with answers. Carbohydrate exam questions and answers for students and interviews.

1. A common way that cells capture the energy released during the breakdown of large molecules is to add electrons to smaller, specialized molecules that can accept them. This process of electron acceptance is otherwise known as

Options

A : biosynthesis

B : metabolism

C : reduction

D : catalysis

2. Two major products of pentose phosphate pathway are

Options

A : nicotinamide adenine dinucleotide and ribose 5-phosphate

B : flavine adenine dinuclueotide and glucose 5-phosphate

C : FAD and CoA

D : NADPH and NAD

3. Gluconeogenesis requires a higher amount of ATP equivalents as compared to that produced by glycolysis because

Options

A : gluconeogenesis releases energy as heat

B : glycolysis releases energy as heat

C : glycolysis occurs in the mitochondria while gluconeogenesis occurs in the cytosol

D : all of the above

4. In lysozyme catalysis, which of the following does not contribute?

Options

A : The abnormally high pK a of Glu35

B : The strained conformation of the D sugar

C : Formation of a covalent intermediate at Asp52

D : Formation of a covalent intermediate at Ser195

5. What is present in the stomach to prevent self-digestion?

Options

A : Mucus

B : acid

C : Enzymes

D : hormones

6. Storage polysaccharide made by animals is

Options

A : amylopectin

B : glycogen

C : cellulose

D : collagen

7. Cellulose fibers resemble with the protein structure in the form of

Options

A : ?-sheets

B : ?-helices

C : ?-turns

D : None of these

8. A catabolic intermediate which stimulates phosphofructokinase would stimulate

Options

A : gluconeogenesis

B : glycolysis

C : glycogen synthesis

D : none of these

9. During vigorous exercise, pyruvate produced by glycolysis is converted to

Options

A : acetate

B : lactate

C : monosodium phosphate

D : pyruvic acid

10. Which of the following can act as precursors for gluconeogenesis?

Options

A : Lactate

B : Glycerol

C : Alanine

D : All of these

1. The cells dependent solely on glucose as an energy source are

Options

A : muscle cells

B : brain cells

C : kidney cells

D : liver cells

2. Hexokinase activity in glycolysis is inhibited by

Options

A : glucose 6- phosphate

B : fructose 6-phosphate

C : fructose 1,6 biphosphate

D : phosphofructokinase

3. Humans are unable to digest

Options

A : starch

B : complex carbohydrates

C : denatured proteins

D : cellulose

4. Saliva contains all of the following except

Options

A : hormones

B : amylase

C : bacteria-killing enzymes

D : antibodies

5. The main site for gluconeogenesis is

Options

A : kidney

B : liver

C : brain

D : muscle

6. Which of the following compounds is responsible for coordinated regulation of glucose and glycogen metabolism?

Options

A : NAD +

B : Fructose 2,6 bisphosphate

C : Acetyl-CoA

D : Fructose 1,6 bisphosphate

7. The NAG6 substrate is hydrolyzed by human lysozyme to form

Options

A : 6 glucosamines + 6 acetic acids

B : NAG 4 + NAG 2

C : NAG 3 + NAG 3

D : NAG 3

8. The conversion of pyruvate to oxaloacetate

Options

A : requires biotin

B : involves the fixation of carbon dioxide

C : occurs in the mitochondria

D : all of the above

9. The glycosidic bond

Options

A : in maltose is not hydrolyzed in lactose intolerant humans

B : in sucrose is hydrolyzed by bees

C : joins glucose and fructose to form sucrose

D : both (b) and (c)

10. Pyruvate is initially converted to which of the following in the gluconeogenesis?

Options

A : Glycerol

B : Phosphoenol pyruvate

C : Oxaloacetate

D : Acetyl CoA

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