R4RIN – MCQs, Mock Tests | IIT JEE IIT JEE CHEMISTRY Biomolecules And Biological Processes

Sucrose on hydrolysis yields a mixture which is

1. Optically inactive
2. Dextro rotatory
3. Laevo rotatory
4. Racemic.

✅ Correct Answer: 3

Which disaccharide is present in milk ?

1. Maltose
2. Galactose
3. Sucrose
4. Lactose.

✅ Correct Answer: 4

Which of the following enzymes helps in digestion of proteins ?

1. Invertase
2. Trypsin
3. Triosinase
4. Urease.

✅ Correct Answer: 2

The linkage that holds monosaccharide units together in a polysaccharide is called

1. Peptide linkage
2. Glycoside linkage
3. Hydroxide linkage
4. Nucleoside linkage.

✅ Correct Answer: 2

Lactose on hydrolysis yields

1. Glucose
2. Fructose
3. Glucose and fructose
4. Glucose and galactose.

✅ Correct Answer: 4

A certain compound gives negative test with ninhydrin and positive test with Benedicts solution. The compound is

1. A protein
2. A monosaccharide
3. A lipid
4. An amino acid.

✅ Correct Answer: 2

A sucrose molecule on hydrolysis yields

1. Gloucose
2. Fructose
3. Glucose and fructose
4. Glucose and galactose.

✅ Correct Answer: 3

The letter D in D-glucose signifies

1. dextri ritatory
2. mode of synthesis
3. its configuration
4. its dsiamagnetic nature.

✅ Correct Answer: 3

Ribose and 2-deoxyribose are

1. Isomers
2. Diastereomers
3. Enantiomers
4. Aldopentoses.

✅ Correct Answer: 4

Which of the following is an example of zwitter ion ?

1. Alanine
2. Glycine hydrochloride
3. Both of the above
4. None of these.

✅ Correct Answer: 1

Glycoside linkage is an

1. amide linkage
2. ether linkage
3. ester linkage
4. None of these.

✅ Correct Answer: 2

Glucose and fructose are

1. Isomers of each other
2. Homologues of each other
3. Anomers of each other
4. Enantiomers of each other.

✅ Correct Answer: 1

Hydrolysis of sucrose into (+) glucose and (-) fructose is known as

1. Muta-rotation
2. Inversion
3. Pyrolysis
4. None of these.

✅ Correct Answer: 2

Which of the following is not a monosaccharide ?

1. Glucose
2. Fructose
3. Glyceraldehyde
4. Surcose.

✅ Correct Answer: 4

A pyranose ring consists of a skeleton of

1. 5 carbon atoms and one oxygen atom
2. 6 carbon atoms
3. 6 carbon atoms and one oxygen atom
4. 4 carbon atoms and one oxygen atom.

✅ Correct Answer: 1

Chhse is an example of

1. Denaturede protein
2. Derived protein
3. Conjugated protein
4. Globular protein.

✅ Correct Answer: 1

The reagent which forms crystalline osazone derivative when reacted with glucose is

1. Fehling solution
2. Phenylhydrazine
3. Benedict solution
4. Hydroxylamine.

✅ Correct Answer: 2

Which of the following is the simple carbohnydrate ?

1. Glucose
2. Maltose
3. Sucrose
4. Glyceraldehyde.

✅ Correct Answer: 4

Maltose on hydrolysis yields

1. Fructose
2. Glucose
3. Galactose
4. Glucose + Fructose.

✅ Correct Answer: 2

Amino acids are formed on hydrolysis of

1. Fats
2. Proteins
3. Nucleic acids
4. Carbohydrates.

✅ Correct Answer: 2

Ribose is an example of

1. Polysaccharide
2. Disaccharide
3. Hexose
4. Pentose.

✅ Correct Answer: 4

Glucose on oxidation with bromine water gives

1. Glyceric acid
2. Gluconic acid
3. Saccharic acid
4. Pyruvic acid.

✅ Correct Answer: 2

Insulin is

1. a protein
2. a hormone
3. Both of the above
4. None of these.

✅ Correct Answer: 3

Digestion of carbohydrates mainly takes place in

1. Stomach
2. Small intestine
3. Large intestine
4. Mouth.

✅ Correct Answer: 2

Which of the following is not sweet in taste ?

1. Lactose
2. Maltose
3. Galactose
4. Starch.

✅ Correct Answer: 4

Which of the following is an ketohexose ?

1. Fructose
2. Maltose
3. Glucose
4. Ribose.

✅ Correct Answer: 1

Which of the following is a non reducing sugar ?

1. Glyceraldehyde
2. Glucose
3. Fructose
4. Sucrose.

✅ Correct Answer: 4

he sweetest carbohydrate is .

1. Sucrose.
2. Glucose
3. Fructose
4. Saccharine

✅ Correct Answer: 3

Which of the following compounds can reduce Tollens reagent ?I. Sucrose ; II. ; Glucose ; III. Fructose ; IV. Maltose.

1. I, II, III and IV
2. II
3. II and III
4. II, III and IV.

✅ Correct Answer: 4

Whcih of the following bases is not present in DNA ?

1. Thymine
2. Uracil
3. Adenine
4. Guanine.

✅ Correct Answer: 2

Which of the following is an example of aldopentose ?

1. Glyceraldeyhde
2. Ribose
3. Fructose
4. Erythrose.

✅ Correct Answer: 2

Which of the following is an example of zwitter ion ?

1. Aniline
2. Alanine hydrochloride
3. Glycine
4. All of the above.

✅ Correct Answer: 3

The number of polyeptide chains present in a molecule of haemoglobin is

1. 8
2. 6
3. 4
4. 12

✅ Correct Answer: 3

The energy released during conversion of ATP to ADP is approximately

1. 31 KJ/mole
2. 3.0 KJ/mole
3. 28 KJ/mole
4. 2.8 KJ/mole

✅ Correct Answer: 1

Glucose on reaction with excess phenylhydrazine gives glucosazone. In this reaction one molecule of glucose reacts with_______ molecules of phenylhydrazine.

1. Two
2. Three
3. Four
4. Six.

✅ Correct Answer: 2

In stomach the proteins are broken down into peptides by enzyme

1. Trypsin
2. Pepsin
3. Chymotrypsin
4. Amylase.

✅ Correct Answer: 2

Classification of proteins into fibrous and globular forms is on the basis of

1. Primary structure
2. Secondary structure
3. Tertiary structure
4. Quarternary structure.

✅ Correct Answer: 3

Glucose on oxidation with nitric acid yields

1. Giucaric acid
2. Gluconic acid
3. Oxalic acid
4. Sorbitol.

✅ Correct Answer: 1

Pyrimidine bases present in RNA are

1. Adenine and guanine
2. Thymine and uracil
3. Uracil and cytosine
4. Thymine and cytosine.

✅ Correct Answer: 3

A nucleoside is made up of a

1. base and sugar
2. base and phosphoric acid
3. sugar and phosphoric acid
4. sugar, a base and phosphoric acid.

✅ Correct Answer: 1

The first stage of oxidation of carbohydrates is known as

1. Glycolysis
2. Celluar respiration
3. Krebs cycle
4. Anabolism.

✅ Correct Answer: 1

Reference proteins are those obtained from

1. Milk
2. Soyabean
3. Meat
4. Egg

✅ Correct Answer: 4

Digestion of lipids occurs primarily in

1. Stomach
2. Small intestine
3. Mouth
4. Large intestine.

✅ Correct Answer: 4

Whcih of the following is protozoal disease ?

1. Mumps
2. Measles
3. Syphilis
4. Malaria.

✅ Correct Answer: 4

Adenosine monophosphate (AMP) is a/an

1. nucleotide
2. nucleoside
3. enzyme
4. nucleic acid.

✅ Correct Answer: 1

Whcih of the following bases is a purine ?

1. Thymine
2. Uracil
3. Cytosine
4. Adenine.

✅ Correct Answer: 4

Which of the following is most abundant in the living world ?

1. Starch
2. Proteins
3. Glucose
4. Cellulose.

✅ Correct Answer: 4

Insulin is secreted by

1. Pancres
2. Stomach
3. Thyroid
4. Adernal medula.

✅ Correct Answer: 1

The linkage which holds various amino acid units in primary structure of proteins is

1. glycoside linkage
2. peptide linkage
3. ionic linkage
4. hydrogen bond.

✅ Correct Answer: 2

Gums and pectins are examples of .

1. Protiens
2. Lipids
3. Enzymes
4. Polysaccharides

✅ Correct Answer: 4

Glycylalanine and alanylglycine are

1. Stereosisomers
2. Structural isomers
3. Diastereomers
4. Identical.

✅ Correct Answer: 2

Whcih of the following fatty acids is a saturated fatty acid ?

1. Oleic acid
2. Linoleic acid
3. Linolenic acid
4. Stearic acid.

✅ Correct Answer: 4

Which of the following is not proteinous ?

1. Wool
2. Hair
3. Nails
4. DNA.

✅ Correct Answer: 4

Glucose gives silver mirror with Tollens reagent. It shows the presence of a/an

1. Alcoholic group
2. Keto group
3. Aldehydic group
4. Acidic group.

✅ Correct Answer: 3

In myoglobin the number of polypeptide chains associated with one heme unit is

1. Three
2. One
3. Two
4. Four.

✅ Correct Answer: 2

With which of the following disease is Vitamin K associated ?

1. Rickets.
2. Coagulating property of blood
3. Scurvy
4. Sore throat.

✅ Correct Answer: 2

Which of the following is not a sugar ?

1. Sucrsoe
2. Glucose
3. Fructose
4. All are sugars.

✅ Correct Answer: 4

Which name is associated with the chemical substances produced in endocrine ductless glands ?

1. Vitamins
2. Antigens
3. Bile acids
4. Hormones.

✅ Correct Answer: 4

The main structural feature of proteins is

1. Peptide linkage
2. Glucoside linkage
3. Ether linkage
4. All the three.

✅ Correct Answer: 1

Glucose cannot be classified as

1. Hexose
2. Carbohydrate
3. Aldose
4. Oligosaccharide.

✅ Correct Answer: 4

nvert sugar is

1. A variety of cane sugar
2. Optically inactive form of sugar
3. Mixture of glucose and fructose in equimolar proportion
4. Mixture of glucose and galactose.

✅ Correct Answer: 3

In cellular respiration, there is a net gain of _________ per molecule of glucose

1. 38 ATP molecules
2. 50 ATP molecules
3. 36 ATP molecules
4. 10 ATP molecules.

✅ Correct Answer: 3

Catabolism refers to

1. breakdown of complex molecules in living organisms
2. synthesis of complex molecules
3. breakdown of complex molecules
4. None of these.

✅ Correct Answer: 1

Biochemical reactions which require oxygen are called

1. Metabolic
2. both synthesis as well as
3. Anaerobic
4. No specific name.

✅ Correct Answer: 2

Which chemical substance act as emulsifiers in lipid metabolism ? .

1. Hydrochloric acid
2. Bile acids
3. Nucleosde
4. Fatty acids

✅ Correct Answer: 2

During digestion which enzyme converts peptides into amino acids

1. Peptidase
2. Invertase
3. Lipase
4. Maltsae

✅ Correct Answer: 1

When hemiacetal reacts with alcohol, the product is

1. Dihemiacetal
2. Alcohol
3. Peptide
4. Acetal.

✅ Correct Answer: 4

The amino acids are the end products of the digestion of

1. Lipids
2. Fats
3. Proteins
4. Enzymes.

✅ Correct Answer: 3

Which of the following can be used for detection of traces of iodine ?

1. Glucose in aqueous solution
2. Starch in aqueous solution
3. Cellulose in alcoholic solution
4. Cellulose in aqueous solution.

✅ Correct Answer: 2

The constituent units of sucrose are

1. lactose and glucose
2. glucose and fructose
3. galactose and glucose
4. glucose and maltose.

✅ Correct Answer: 2

Which one of the following is synthesized in our body by sun rays?

1. Vitamin D
2. Vitamin B
3. Vitamin K
4. Vitamin A

✅ Correct Answer: 4

During glycolysis one molecule of glucose breaks into

1. Two molecules of acetic acid
2. Three molecules of acetic acid
3. Two molecules of pyruvic acid
4. Three molecules of pyruvic acid.

✅ Correct Answer: 2

Which carbohydrate is an essential constituent of plant cells ?

1. Starch
2. Sucrose
3. Glucose
4. Cellulose.

✅ Correct Answer: 4

Denaturation of protein does not have any effect on its

1. Secondary structure
2. Tertiary structure
3. Quaternary structure
4. Primary structure.

✅ Correct Answer: 4

The force of attraction between the neighbouring peptide chains is

1. van der Waals force
2. Covalent bond
3. Hydrogen bond
4. Peptide linkage.

✅ Correct Answer: 3

Fructose has

1. Bitter taste
2. Sweet taste
3. Tasteless
4. Salty taste.

✅ Correct Answer: 2

ATP represents

1. abnormal temperature ande pressure
2. atmospheric temperature
3. adenosine triphosphate
4. None of these.

✅ Correct Answer: 3

The region of plants where photosynthesis occurs is called .

1. Mitochondria
2. Chloroplast
3. Cytoplasm
4. None of these

✅ Correct Answer: 2

Whcih one of following vitamins checks night blindness ?

1. A
2. B
3. C
4. D

✅ Correct Answer: 1

Hyperglycemia refers to

1. High blood sugar level
2. Low blood sugar level
3. High concentration of salts in blood
4. Low concentration of salts in blood.

✅ Correct Answer: 1

Photosynthesis involves

1. conversion of chemical energy into radiant energy
2. conversion of chemical energy into mechanical energy
3. conversion of solar energy into chemical energy
4. conversio of mechanical energy into chemical energy.

✅ Correct Answer: 4

Which of the following is a test for proteins ?

1. Molischs test
2. Beilstein test
3. Biuret test
4. Benedicts test.

✅ Correct Answer: 3

Enzymes are

1. Steroids
2. Proteins
3. Fatty acids
4. Nucleic acids.

✅ Correct Answer: 2

Biuret test is used for the detection of

1. Sugars Proteins
2. Proteins
3. Fats
4. Starch.

✅ Correct Answer: 2

At isoelectric point, the amino acid has

1. Least viscosity
2. Maximum surface tension
3. Maximum solubility
4. All of the above.

✅ Correct Answer: 1

Peptids on hydrolysis give .

1. Ammonia
2. Amines
3. Amino acids
4. Hydroxy acids

✅ Correct Answer: 3

Which of following is an example of fibrous protein ?

1. Insulin
2. Haemoglobin
3. Fibroin
4. Glucogen.

✅ Correct Answer: 3

The enzyme that converts starch into maltose is called

1. Zymase
2. Maltase
3. Invertase
4. Amylase.

✅ Correct Answer: 4

The proteins with a prosthetic group are known as

1. Complix proteins
2. Conjutated proteins
3. Secondary proteins
4. Essential proteins.

✅ Correct Answer: 2

The non-proteinous substances which certain enzymes require for their activity are called

1. Catalysts
2. Inhibitors
3. Co-enzymes
4. Epimers.

✅ Correct Answer: 3

Which of the following is an example of globular protein ?

1. Myosin
2. Collagen
3. Keratin
4. Haemoglobin

✅ Correct Answer: 4

The disease phenyl ketone urea is caused by the deficiency of .

1. Acetophenone
2. Phenyl acetone
3. Triosinase
4. Phenylalanine hydroxylase

✅ Correct Answer: 4

An example of zwitter ion is

1. Glucine hydrochloride
2. Ammonium acetate
3. Aniline
4. Alanine.

✅ Correct Answer: 4

The destruction of the biological nature and activity of proteins by heat or chemical gaent is called

1. dehydration
2. denaturation
3. denitrogenation
4. deammination.

✅ Correct Answer: 2