MCQ Questions For Class 11 Biomolecules

Students can refer to MCQ Questions for Class 11 Biomolecules provided below. You should solve these questions and compare your answers with the solutions provided below by our teachers. The MCQs for Grade 11 Biomolecules have been updated based on the latest syllabus and examination guidelines issued by CBSE, NCERT and KVS.

Class 11 Biomolecules MCQs Questions with Answers

See below free multiple choice questions for Class 11 Biomolecules. By practicing these MCQ Questions for Class 11 Biology you will be able to revise the entire course and also test your understanding

MCQ Questions for Class 11 Biomolecules

Question. Co-factor (prosthetic group) is a part of holoenzyme. It is
(a) loosely attached organic part
(b) loosely attached inorganic part
(c) accessory non-protein substance attached firmly
(d) none of these. 

Question. Which of the following statements about enzymes is wrong? 
(a) Enzymes are denatured at high temperatures.
(b) Enzymes are mostly proteins but some are lipids also.
(c) Enzymes are highly specific.
(d) Enzymes require optimum pH and temperature for maximum activity.

Question. A segment of DNA has 120 adenine and 120 cytosine bases. The total number of nucleotides present in the segment is   
(a) 120
(b) 240
(c) 60
(d) 480.

Question. Which one of the following statements is incorrect?   
(a) The competitive inhibitor does not affect the rate of breakdown of the enzyme-substrate complex.
(b) The presence of the competitive inhibitor decreases the Km of the enzyme for the substrate.
(c) A competitive inhibitor reacts reversibly with the enzyme to form an enzyme-inhibitor complex.
(d) In competitive inhibition, the inhibitor molecule is not chemically changed by the enzyme.

Question. Enzymes are not found in 
(a) fungi
(b) algae
(c) virus
(d) cyanobacteria.

Question. Modern detergents contain enzyme preparations of   
(a) thermoacidophiles
(b) thermophiles
(c) acidophiles
(d) alkaliphiles.

Question. A non-proteinaceous enzyme is   
(a) lysozyme
(b) ribozyme
(c) ligase
(d) deoxyribonuclease.

Question. Which is the derivative of amino acid ? 
(a) Epinephrine
(b) Estrogen
(c) Progesterone
(d) All of these

Question. High energy bond of ATP are present in between   
(a) C – C
(b) C – O
(c) C – N
(d) O – P

Question. Who coined the term zymase?   B
(a) Pasteur
(b) Buchner
(c) Kuhne
(d) Sumner

Question. Apoenzyme is 
(a) protein
(b) lipid
(c) sugar
(d) vitamin

Question. Gamma globulins are synthesized inside 
(a) liver 
(b) kidney
(c) bone marrow
(d) lymph and lymphoid tissues

Question. Proteins are 
(a) polysaccharides
(b) polyamides
(c) polynucleotides
(d) polyglycol

Question. Which of the following gives Fehling’s test?   
(a) Pectin
(b) Sucrose 
(c) Cellulose
(d) Glucose

Question. The nicotinamide is synthesized in our body from 
(a) tryptophan
(b) tryosine
(c) valine
(d) alanine

Question. An example of competitive inhibition of an enzyme is the inhibition of   
(a) succinic dehydrogenase by malonic acid
(b) cytochrome oxidase by cyanide
(c) hexokinase by glucose-6-phosphate
(d) carbonic anhydrase by carbon dioxide

Question. Which of the following set of three items are not true as each set belongs to the category mentioned against them   
(a) Lysine, glycine, thiamine – Amino acids
(b) Myosin, oxytocin and gastrin – Hormones
(c) Rennin, helicase and hyaluronidase -Enzyme
(d) Optic nerve, occulomotor, vagus – Sensory nerves

Question. Which of the following contain 􀁅-l, 4 linkage?   
(a) Maltose
(b) Sucrose
(c) Lactose
(d) Fructose

Question. Which statement is true?   
(a) Adenine has 4 nitrogen atoms.
(b) Cytosine has 3 nitrogen atoms.
(c) Guanosine has 3 nitrogen atoms.
(d) Uracil has 5 nitrogen atoms.

Question. Alpha-keratin is a protein present in 
(a) blood
(b) skin
(c) lymph
(d) eggs

Question. Which one of the following statements regarding starch and cellulose is not correct?   
(a) Both of them are of plant origin.
(b) Both of them are polymers.
(c) Both of them give colour with iodine.
(d) Both of them are made up of glucose molecules.

Question. Which of the following type of enzyme is not matched correctly with the molecule that it breaks down? 
(a) Amylase–starch
(b) Lipase–starch
(c) Protease–proteins
(d) Disaccharidase–sugars

Question. Which one of the following is a non – reducing carbohydrate? 
(a) Maltose
(b) Sucrose
(c) Lactose
(d) Ribose 5 – phosphate

Question. The Km value of the enzyme is the value of the substrate concentration at which the reaction reaches to 
(a) Zero
(b) 2 Vmax
(c) ½ Vmax
(d) ¼ Vmax

Question. Inorganic catalyst work efficiently at ________temperature and ________ pressure. 
(a) high, low
(b) low, low
(c) low, high
(d) high, high

Question. Nucleotides are building blocks of nucleic acids. 
Each nucleotide is a composite molecule formed by 
(a) base-sugar-phosphate.
(b) base-sugar-OH.
(c) (base-sugar-phosphate)n.
(d) sugar-phosphate