Biomolecule NEET Question 2024

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Biomolecule Chemistry NEET Practice Questions

1 / 35

Vitamin B12 contains

(a) Fe (II)

(b) Co (III)

(d) Ca (II)

2 / 35

The glucose molecule reacts with X number of molecules of phenol hydrazine to yield season. The value of X is

(a) two

(b) one

(d) three

3 / 35

Which of the following vitamins is water soluble?

(d) Vitamin B

(a) Vitamin E

(b) Vitamin K

4 / 35

Glycolysis is

(a) oxidation of glucose to glutamate

(b) conversion of pyruvate to citrate

(d) conversion of glucose to haem.

5 / 35

Which is the correct statement?

(b) Amylose is a component of cellulose.

(d) In cyclic structure of fructose, there are four carbons and one oxygen atom

(a) Starch is a polymer of a-glucose

6 / 35

Which of the following compounds can form a zwitter ion?

(a) Aniline

(b) Acetanilide

(d) Glycine

7 / 35

On hydrolysis of starch, we finally get

(a) glucose

(d) sucrose

(b) fructose

8 / 35

Chemically considering digestion is basically

(b) hydrogenation

(d) dehydrogenation

(a) anabolism

9 / 35

Number of chiral carbons in b-D-(+) glucose is

(b) six

(a) five

(d) four

10 / 35

Which of the following is the sweetest sugar?

(a) Fructose

(b) Glucose

(d) Maltose

11 / 35

The oxidation of glucose is one of the most important reactions in a living cell. What is the number of ATP molecules generated in cells from one molecule of glucose?

(d) 18

(b) 38

(a) 28

12 / 35

The a-D-glucose and b-D-glucose differ from each other due to difference in the carbon atom with respect to its

(a) number of OH groups

(b) size of hemiacetal ring

(d) configuration

13 / 35

Fructose reduces Tollens’ reagent due to

(a) asymmetric carbons

(b) primary alcoholic group

(d) enolisation of fructose followed by conversion to aldehyde by base

14 / 35

Which of the following statements about enzymes is true?

(d) Pepsin is proteolytic enzyme

(b) Enzymes are highly specific both in binding chiral substrates and in catalysing their reactions.

(a) Enzymes catalyse chemical reactions by increasing the activation energy.

15 / 35

The human body does not produce

(b) DNA

(a) enzymes

(d) hormones

16 / 35

Which of the following is not a fat soluble vitamin?

(a) Vitamin B complex

(b) Vitamin D

(d) Vitamin A

17 / 35

Which of the following gives positive Fehling solution test?

(b) Glucose

(d) Protein

(a) Sucrose

18 / 35

In a protein molecule various amino acids are linked together by

(b) dative bond

(d) b-glycosidic bond

(a) peptide bond

19 / 35

Sucrose on hydrolysis gives

(a) b-D-glucose + a-D-fructose

(d) a-D-fructose + b-D-fructose.

(b) a-D-glucose + b-D-glucose

20 / 35

Deficiency of vitamin B1 causes the disease

(b) beri-beri

(d) sterility.

(a) convulsions

21 / 35

Which one of the following does not exhibit the phenomenon of mutarotation?

(d) (–)–Fructose

(a) (+)–Sucrose

(b) (+)–Lactose

22 / 35

Which one given below is a non-reducing sugar?

(d) Lactose

(a) Glucose

(b) Sucrose

23 / 35

Haemoglobin is

(a) a vitamin

(d) a globular protein.

(b) a carbohydrate

24 / 35

Enzymes are made up of

(d) carbohydrates

(b) proteins with specific structure

(a) edible proteins

25 / 35

Which of the following is a basic amino acid?

(b) Alanine

(a) Serine

(d) Lysine

26 / 35

Cellulose is polymer of

(b) fructose

(a) glucose

(d) sucrose

27 / 35

The helical structure of protein is stabilised by

(a) dipeptide bonds

(b) hydrogen bonds

(d) peptide bonds

28 / 35

Which structure(s) of proteins remain(s) intact during denaturation process?

(d) Tertiary structure only

(a) Both secondary and tertiary structures

(b) Primary structure only

29 / 35

The function of enzymes in the living system is to

(a) catalyse biochemical reactions

(b) provide energy

(d) provide immunity.

30 / 35

The difference between amylose and amylopectin is

(a) amylopectin have 1 → 4 a-linkage and 1 → 6 a-linkage

(d) amylose is made up of glucose and galactose.

(b) amylose have 1 → 4 a-linkage and 1 → 6 b-linkage

31 / 35

The non-essential amino acid among the following is

(a) lysine

(d) alanine

(b) valine

32 / 35

Which of the following is correct?

(a) Cycloheptane is an aromatic compound.

(b) Diastase is an enzyme

(d) All of these

33 / 35

Which functional group participates in disulphide bond formation in proteins?

(d) Thiolactone

(b) Thioether

(a) Thioester

34 / 35

a-D-glucose and b-D-glucose are

(d) diastereomers

(a) epimers

(b) anomers

35 / 35

The helical structure of protein is stabilised by

(a) dipeptide bonds

(b) hydrogen bonds

(d) peptide bonds

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Biomolecules NEET Questions

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Classification of Elements

Chemical Bonding

States of Matter

Thermodynamics

Equilibrium

Redox Reactions

Hydrogen

Hydrocarbons

S- Block Elements

Environmental Chemistry

The p – Block Elements

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Aldehydes, Ketones

Coordination Compounds

Carboxylic Acids

Amines

Polymers

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