CBSE Class 11 Biology Biomolecules MCQs Set B

Practice CBSE Class 11 Biology Biomolecules MCQs Set B provided below. The MCQ Questions for Class 11 Chapter 9 Biomolecules Biology with answers and follow the latest CBSE/ NCERT and KVS patterns. Refer to more Chapter-wise MCQs for CBSE Class 11 Biology and also download more latest study material for all subjects

MCQ for Class 11 Biology Chapter 9 Biomolecules

Class 11 Biology students should review the 50 questions and answers to strengthen understanding of core concepts in Chapter 9 Biomolecules

Chapter 9 Biomolecules MCQ Questions Class 11 Biology with Answers

Question : Two free ribonucleotide units are interlinked with 
a) peptidebond
b) covalent bond
c) hydrogen bond
d) phosphodiester bond

Question : Most diverse macromolecules, found in the cell both physically and chemically are
a) proteins

b) carbohydrates
c) nucleic acids
d) lipids

Question : The nitrogenous organic base purine occurring in RNA is 
a) cytosine
b) thymine
c) guanine
d) uracil
 
Question : In which one of the following groups, all the three are examples of polysaccharides?
a) Starch, glycogen, cellulose
b) Sucrose, maltose, glucose
c) Glucose, fructose, lactose
d) Galactose, starch, sucrose
 
Question : What is common among amylase, rennin and trypsin? 
a) These are all proteins
b) These are proteolytic enzymes
c) These are produced in stomach
d) These act at a pH lower than 7
 
Question : Cofactor (coenzyme) is a part of holoenzyme it is 
a) loosely attached inorganic part
b) accessory non-protein substance attached firmly
c) loosely attached organic part
d) None of the above
 
Question : Genes are packaged into a bacterial chromosome by 
a) histones
b) basic proteins
c) acidic proteins
d) actin
 
Question : The RNA that picks up specific amino acids from the amino acid pool in the cytoplasm to ribosome during protein synthesis is called
a) mRNA
b) tRNA
c) rRNA
d) carrier RNA
 
Question : Protein synthesis in an animal cell takes place 
a) only in the cytoplasm
b) in the nucleolus as well as in cytoplasm
c) in cytoplasm as well as in mitochondria
d) only on ribosomes attached to the nuclear envelope
 
Question : DNA synthesis can be specifically measured by estimating the incorporation of radio labelled 
a) uraci
b) adenine
c) thymidine
d) deoxyribose sugar
 
Question : Lactose is composed of
a) glucose + glucose
b) glucose + fructose
c) fructose + galactose
d) glucose + galactose
 
Question : Radioactive thymidine when added to the medium surrounding living mammalian cells gets incorporated into the newly synthesized DNA. Which of the following types of chromatin is expected to become radioactive if cells are exposed radioactive thymidine as soon as they enter the S-phase?
a) Heterochromatin
b) Euchromatin
c) Both a) and b)
d) Neither heterochromatin nor euchromatin but only the nucleolus
 
Question : Cellulose, the most important constituent of plant cell wall is made of
a) unbranched chain of glucose molecules linked by α 1, 4 glycosidic bond
b) branched chain of glucose molecules linked by β 1, 4 glycosidic bond in straight chain and α 1,6 glycosidic bond at the site of branching
c) unbranched chain of glucose molecules linked by β 1, 4 glycosidic bond
d) branched chain of glucose molecules  linked by  α 1, 6 glycosidic bond at the site of branching
 
Question : Which one of the following statements about cytochrome 450 is wrong? 
a) It contains iron
b) It is a coloured cell
c) It has an important role in metabolism
d) It is an enzyme involved in oxidation reactions
 
Question : Which is an essential amino acid? 
a) Serine
b) Aspartic acid
c) Glycine
d) Phenylalanine
 
Question : ATP is a 
a) nucleotide
b) nucleosome
c) nucleoside
d) purine
 
Question : Conjugated proteins containing carbohydrates as prosthetic group are known as
a) chromoproteins
b) glycoproteins
c) lipoproteins
d) nucleoproteins
 
Question : Enzymes are absent in 
a) algae b) fungi
c) cyanobacteria
d) viruses
 
Question : Enzymes enhance the rate of reaction by 
a) forming a reactant-product complex
b) changing the equilibrium point of the reaction
c) combining with the product as soon as it is formed
d) lowering the activation energy of the reaction
 
Question : Feedback inhibition of an enzymatic reaction is caused by
a) end product
b) substrate
c) enzyme
d) rise in temperature
 
Question : Length of one turn of the helix in a B-form DNA is approximately 
a) 3.4 nm
b) 2nm
c) 0.34 nm
d) 20 nm
 
Question : The transfer RNA molecule in 3D appears 
a) L-shaped
b) E-shaped
c) Y-shaped
d) S-shaped
 
Question : One of the similarities between DNA and RNA is that both 
a) are polymers of nucleotides
b) are capable of replicating
c) have similar sugars
d) have similar pyrimidine bases
 
Question : Due to discovery of which of the following in 1980 the evolution was termed as RNA world? 
a) mRNA, tRNA, rRNA synthesize proteins
b) In some virus RNA is genetic material
c) RNA have enzymatic property
d) RNA is not found in all cells
 
Question : Cytochrome is 
a) metallo flavoprotein
b) Fe containing porphyrin pigment
c) glycoprotein
d) lipid
 
Question : Types of RNA polymerase required in nucleus for RNA synthesis 
a) 1
b) 2
c) 3
d) 4
 
Question : Spoilage of oil can be detected by which fatty acid? 
a) Oleic acid
b) Linolenic acid
c) Linoleic acid
d) Erucic acid
 
Question : In plants, inulin and pectin are 
a) reserve materials
b) wastes
c) excretory material
d) insect-attracting material
 
Question : Enzyme first used for nitrogen fixation is 
a) nitrogenase
b) nitroreductase
c) transferase
d) transaminase
 
Question : Most abundant organic compound on earth is 
a) protein
b) cellulose
c) lipids
d) steroids
 

MCQs for Chapter 9 Biomolecules Biology Class 11

Students can use these MCQs for Chapter 9 Biomolecules to quickly test their knowledge of the chapter. These multiple-choice questions have been designed as per the latest syllabus for Class 11 Biology released by CBSE. Our expert teachers suggest that you should practice daily and solving these objective questions of Chapter 9 Biomolecules to understand the important concepts and better marks in your school tests.

Chapter 9 Biomolecules NCERT Based Objective Questions

Our expert teachers have designed these Biology MCQs based on the official NCERT book for Class 11. We have identified all questions from the most important topics that are always asked in exams. After solving these, please compare your choices with our provided answers. For better understanding of Chapter 9 Biomolecules, you should also refer to our NCERT solutions for Class 11 Biology created by our team.

Online Practice and Revision for Chapter 9 Biomolecules Biology

To prepare for your exams you should also take the Class 11 Biology MCQ Test for this chapter on our website. This will help you improve your speed and accuracy and its also free for you. Regular revision of these Biology topics will make you an expert in all important chapters of your course.

Where can I access latest CBSE Class 11 Biology Biomolecules MCQs Set B?

You can get most exhaustive CBSE Class 11 Biology Biomolecules MCQs Set B for free on StudiesToday.com. These MCQs for Class 11 Biology are updated for the 2025-26 academic session as per CBSE examination standards.

Are Assertion-Reasoning and Case-Study MCQs included in the Biology Class 11 material?

Yes, our CBSE Class 11 Biology Biomolecules MCQs Set B include the latest type of questions, such as Assertion-Reasoning and Case-based MCQs. 50% of the CBSE paper is now competency-based.

How do practicing Biology MCQs help in scoring full marks in Class 11 exams?

By solving our CBSE Class 11 Biology Biomolecules MCQs Set B, Class 11 students can improve their accuracy and speed which is important as objective questions provide a chance to secure 100% marks in the Biology.

Do you provide answers and explanations for CBSE Class 11 Biology Biomolecules MCQs Set B?

Yes, Biology MCQs for Class 11 have answer key and brief explanations to help students understand logic behind the correct option as its important for 2026 competency-focused CBSE exams.

Can I practice these Biology Class 11 MCQs online?

Yes, you can also access online interactive tests for CBSE Class 11 Biology Biomolecules MCQs Set B on StudiesToday.com as they provide instant answers and score to help you track your progress in Biology.