Chapter 9 Biomolecules MCQs for Class 11 Biology

Chapter 9 Biomolecules MCQs for Class 11 Biology , Here you can download class 12 Biomolecules notes in pdf , Chapter 9 Biomolecules Notes for Class 11 Biology

Chapter 9 Biomolecules MCQs for Class 11 Biology

Here students can practice Chapter 9 Biomolecules MCQs for Class 11 Biology. All the MCQs are divided into several sub-pages. Each page has 40 MCQs, for the next page just scroll down and click on the buttons. Also you can practice Class 11 Biology MCQs (Multiple Choice Questions) for other chapters.

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Q 1.: Which enzyme is the most specific?

(A) Trypsin

(B) Pepsin

(C) Sucrase 

(D) Nuclease

Option – (d)

Q 2.: A proteinaceous product is

(A) Terylene

(B) Cellulose

(C) Silk and Wool

(D) Polyethylene

Option – (c)

Q 3.: Enzymes are functional at  

(A) 10º-15ºC

(B) 15º-25ºC

(C) 25º-30ºC

(D) 30º-50ºC

Option – (d)

Q 4.: Which enzyme is useful as colour brightening agent in detergent industry?

(A) Amylase

(B) Lipase

(C) Protease 

(D) Cellulase

Option – (d)

Q 5.: The richest energy compound is

(A) Creatinine phosphate

(B) Protein

(C) Carbohydrate

(D) Fat

Option – (d)

Q 6.: An organic substance which binds to enzyme and is essential for activity of enzyme is

(A) Coenzyme

(B) Isoenzyme

(C) Holoenzyme

(D) Apoenzyme

Option – (a)

Q 7.: Which one of the following amino acids was not found to be synthesised in Miller’s experiment ?

(A) Glycine

(B) Aspartic acid

(C) Glutamic acid

(D) Altanine

Option – (c)

Q 8.: About 98% mass of every living organism is composed by just six elements including C,H,N,O and

(A) Mg and Na  

(B) Ca and P

(C) P and S

(D) S and Mg

Option – (c)

Q 9.: Allosteric modulation is due to inhibition action of enzyme by

(A) Competitive inhibition

(B) Substrate concentration

(C) Products of reaction

(D) Enzyme concentration

Option – (d)

Q 10.: Which of the following is a disaccharide?

(A) Glucose

(B) Fructose

(C) Sucrose

(D) Galactose

Option – (c)

Q 11.: Hydrolysis of lipid yields

(A) Fats 

(B) Fatty acids and glycerol 

(C) Mannose and glycerol

(D) Maltose and fatty acids

Option – (b)

Q 12.: Which of the following is an example of structural protein

(A) Myosin

(B) Collagen 

(C) Keratin

(D) All of these

Option – (c)

Q 13.: Cellulose is a polymer of

(A) α-glucose

(B) α-fructose

(C) β-glucose

(D) β-fructose

Option – (c)

Q 14.: Feedback inhibition of an enzymatic reaction is caused by

          (A) Substrate

(B) Enzyme

(C) End product

(D) Rise in temperature

Option – (c)

Q 15.: The aleurone layer in maize grain is specially rich in

(A) Lipids

(B) Auxins

(C) Proteins

(D) Starch

Option – (c)

Q 16.: The enzyme which converts corn starch into fructose rich corn syrup is

(A) Amylase

(B) Glucoamylase

(C) Glucoisomerase

(D) All of these

Option – (d)

Q 17.: Which amino acid is denoted by symbol ‘F’?

(A) Phenylalanine

(B) Proline

(C) Tryptophan

(D) Methionine

Option – (a)

Q 18.: Benedict’s test is conducted to confirm the presence of

(A) Polysaccharide

(B) Reducing sugar

(C) Lipids

(D) Proteins

Option – (b)

Q 19.: A nucleoside is

(A) Purine / pyrimidine + phosphate

(B) Purine / pyrimidine + sugar

(C) Pyrimidine + purine + phosphate

(D) Purine + sugar + phosphate

Option – (b)

Q 20.: Quaternary structure of protein has

(A) Four subunits

(B) Either α- or  β-form

(C) No relation to protein function

(D) Depends on primary structure of individual polypeptides

Option – (c)

Q 21.: Holoenzyme is an/ a

(A) Nonprotein and apoenzyme

(B) Protein and apoenzyme

(C) Enzyme protein and coenzyme

(D) Enzyme nonprotein and coenzyme

Option – (a)

Q 22.: Which of the following is not a conjugated protein?

(A) Peptone

(B) Phosphoprotein

(C) Lipoprotein

(D) Chromoprotein

Option – (a)

Q 23.: Which pair of nitrogen bases is wrongly matched?

(A) Guanine, Adenine – Purines

(B) Thymine, Uracil – Pyrimidines

(C) Adenine, Thymine – Purines 

(D) Uracil, Cytosine – Pyrimidines

Option – (c)

Q 24.: Sugar present in milk

(A) Fructose

(B) Glucose

(C) Lactose

(D) Sucrose

Option – (c)

Q 25.: An essential fatty acid is

(A) Palmitic acid

(B) Arachidonic acid

(C) Stearic acid

(D) Arachidic acid

Option – (b)

Q 26.: Benedict’s reagent test is conducted to confirm the presence of

(A) Polysaccharides like starch

(B) Lipids

(C) Reducing sugars

(D) Proteins

Option – (c)

Q 27.: Paraffin wax is

(A) Ester

(B) Acid

(C) Monohydric alcohol

(D) Cholesterol

Option – (a)

Q 28.: Which one is the sweetest sugar?

(A) Glucose

(B) Fructose

(C) Maltose

(D) Sucrose

Option – (b)

Q 29.: The substance, which is metal ion essential for the normal functioning of enzyme is called

(A) Cofactor

(B) Coenzyme

(C) Holoenzyme

(D) None of these

Option – (a)

Q 30.: The haploid content of human DNA is

(A) 3.2 × 109 bp

(B) 3.3 × 109 bp

(C) 4.6 × 106 bp

(D) 48502 bp

Option – (a)

Q 31.: Activity of an enzyme is least affected by

(A) Temperature

(B) Concentration of substrate

(C) Concentration of enzyme 

(D) Original activation energy of the system

Option – (c)

Q 32.: Meselson and Stahl experiment proved

(A) DNA is a genetic material 

(B) Central dogma

(C) Transformation

(D) Semi-conservative DNA replication   

Option – (d)

Q 33.: Sucrose, a common table sugar is composed of

(A) Glucose and fructose

(B) Glucose and galactose

(C) Fructose and galactose

(D) None of the above

Option – (a)

Q 34.: Table sugar consists of

(A) Lactose

(B) Sucrose

(C) Maltose

(D) Glucose

Option – (a)

Q 35.: The ‘Repeating unit’ of glycogen is

(A) Fructose

(B) Mannose

(C) Glucose

(D) Galactose

Option – (c)

Q 36.: Which one of the following nitrogenous bases is seen only in RNA?

(A) Adenine

(B) Thymine

(C) Uracil

(D) Cytosine

Option – (c)

Q 37.: Which one is diaminodicarboxylic amino acid?

(A) Cystine

(B) Lysine

(C) Cysteine

(D) Aspartic acid

Option – (a)

Q 38.: Class enzymes contained in lysosome is

(A) Lyases

(B) Ligases

(C) Hydrolases

(D) Transferases

Option – (c)

Q 39.: Amino acid that acts as carrier of ammonia from skeletal muscle to liver is

(A) Alanine

(B) Arginine

(C) Methionine

(D) Glutamate

Option – (c)

Q 40.: Chitin is a

(A) Polysaccharide

(B) Nitrogenous polysaccharide

(C) Lipoprotein

(D) Protein

Option – (b)


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We hope that these Chapter 9 Biomolecules MCQs for Class 11 Biology helped you in learning new concepts. All questions are based on NCERT syllabus and some of them have been asked in various competitive exams. You can go to the next pages to practice more for Chapter 9 Biomolecules MCQs for Class 11 Biology, click on the question range given above.

Also you can practice Class 11 Biology MCQs (Multiple Choice Questions) for other chapters.