Free MCQs & Online Quiz Practice for Exams

Q: Fischer esterification is the reaction between:

A) An acid and ester

B) An acid and alcohol

C) An acid halide and ester

D) An ester and NaOH

Q: Acyl chloride can be prepared by the reaction of a carboxylic acid with:

A) phosphorus pentoxide

B) Soda lime

C) HCl

D) Thionyl chloride

Q: The hydrolysis of an ester in presence of alkali is known as:

A) Saponification

B) Decarboxylation

C) Esterification

D) Transesterification

Q: All the acid derivatives can be converted back into the corresponding acid by one common reaction:

A) Ammonolysis

B) Alcoholysis

C) Reduction

D) Hydrolysis

Q: The optimum pH of pepsin is around:

A) 3.0

B) 3.5

C) 2.0

D) 2.5

Q: The most abundant carbohydrate found in:

A) Cellulose

B) Glycogen

C) Pectin

D) Chitin

Q: The glycosidic linkage is present between the molecules of:

A) Glucose

B) Glycine

C) Fatty acid

D) None of these

Q: Steroids belong to the family of:

A) Carbohydrates

B) Proteins

C) Lipids

D) Enzymes

Q: Protein present in haemoglobin has the structure known as:

A) Primary structure

B) Secondary structure

C) Tertiary structure

D) Quaternary structure

Q: Which carbohydrate does not conform to the general formula Cn(H₂O)n?

A) Deoxyribose

B) Ribose

C) Glucose

D) Fructose

Q: Ethanol is produced from starch by the process of:

A) Hydrolysis

B) Hydrogenation

C) Decomposition

D) Fermentation

Q: Humans are unable to digest:

A) Glucose

B) Cellulose

C) Starch

D) Denatured protein

Q: Which one of the following terms is not related to aldohexose?

A) Aldehyde

B) Ketone

C) Six

D) Sugar

Q: Slow healing of wounds is due to the deficiency of:

A) Ca

B) P

C) Zn

D) Fe

Q: RNA is primarily seen in:

A) Nucleus

B) Cytoplasm

C) Cell wall

D) Cell membrane

Q: In which of the following disaccharides both the basic structural units are the same?

A) Maltose

B) Lactose

C) Sucrose

D) All of these

Q: In competitive inhibition, the inhibitor:

A) Competes with enzyme

B) Irreversibly binds with the enzyme

C) Binds with substrate

D) Competes with substrate

Q: In DNA, adenine forms a complementary pair with which other nitrogen base?

A) Uracil

B) Cytosine

C) Thymine

D) Guanine

Q: Proteins are polymers of:

A) Glucose

B) Disulphide bridges

C) Amino acids

D) Peptide bonds

Q: The monomer pair required for the formation of Nylon 6,6 is:

A) Hexamethylene diamine + Adipic acid

B) Hexamethylene diamine + Sebacoyl chloride

C) Hexamethylene diamine + Decanoic acid

D) Hexamethylene amine + Ethanedioic acid