CBSE Class 11 Biology MCQ

Preparing for CBSE Class 11 Biology exams? Mastering multiple-choice questions (MCQs) is a proven strategy to excel in board exams and competitive tests like NEET. This comprehensive guide provides chapter-wise MCQs aligned with the latest CBSE Class 11 Biology syllabus 2025, helping students grasp concepts, test their knowledge, and strengthen their preparation. These questions are carefully curated based on NCERT textbooks, past exam patterns, and expert inputs.

Chapter-wise CBSE Class 11 Biology MCQs

Dive into chapter-specific MCQs to practice and enhance your understanding of key topics. Each section includes questions tailored to test your fundamental and application-based knowledge, making it easier to identify strengths and areas for improvement. Use these NCERT Class 11 Biology MCQs as a foundation for success.

CBSE Class 11 Biology MCQs - Question with Answers

Unit 1: The Living World

Q. The term "taxonomy" was first coined by:

a) Linnaeus

b) De Candolle

c) Aristotle

d) Darwin

Answer: b) De Candolle

Q. The universal source of classification is:

a) International Code of Botanical Nomenclature (ICBN)

b) Binomial nomenclature

c) Zoological Nomenclature

d) Phylogeny

Answer: a) International Code of Botanical Nomenclature (ICBN)

Q. Which of the following is not a taxonomic category?

a) Genus

b) Order

c) Class

d) Variety

Answer: d) Variety

Unit 2: Biological Classification

Q. The five-kingdom classification was given by:

a) Linnaeus

b) Whittaker

c) Aristotle

d) Haeckel

Answer: b) Whittaker

Q .Bacteria reproduce mainly by:

a) Fragmentation

b) Binary fission

c) Budding

d) Conjugation

Answer: b) Binary fission

Q. Viroids differ from viruses in having:

a) RNA molecules without protein coat

b) DNA with protein coat

c) Only protein coat

d) Both DNA & RNA

Answer: a) RNA molecules without protein coat

Unit 3: Plant Kingdom

Q. Bryophytes are called amphibians of the plant kingdom because:

a) Found in water

b) Require water for fertilization

c) Both gametophyte and sporophyte are independent

d) None of these

Answer: b) Require water for fertilization

Q. Double fertilization is unique to:

a) Gymnosperms

b) Angiosperms

c) Bryophytes

d) Pteridophytes

Answer: b) Angiosperms

Q. The dominant phase in pteridophytes is:

a) Gametophyte

b) Sporophyte

c) Both

d) None

Answer: b) Sporophyte

Unit 4: Animal Kingdom

Q. The body cavity in Aschelminthes is:

a) True coelom

b) Pseudocoelom

c) Acoelomate

d) Haemocoel

Answer: b) Pseudocoelom

Q. Which is diploblastic?

a) Cnidaria

b) Annelida

c) Mollusca

d) Arthropoda

Answer: a) Cnidaria

Q. Notochord is present in:

a) Non-chordates

b) All chordates at some stage

c) Vertebrates only

d) Invertebrates only

Answer: b) All chordates at some stage

Unit 5: Morphology of Flowering Plants

Q. Fibrous root system is seen in:

a) Dicot plants

b) Monocot plants

c) Both

d) Algae

Answer: b) Monocot plants

Q. Phyllotaxy in sunflower is:

a) Alternate

b) Opposite

c) Whorled

d) Spiral

Answer: a) Alternate

Q. The seed coat develops from:

a) Ovule

b) Integuments

c) Nucellus

d) Endosperm

Answer: b) Integuments

Unit 6: Anatomy of Flowering Plants

Q. Secondary growth in dicot stem is due to:

a) Apical meristem

b) Intercalary meristem

c) Vascular cambium

d) Cork cambium

Answer: c) Vascular cambium

Q. Xylem is responsible for transport of:

a) Food

b) Water & minerals

c) Hormones

d) Vitamins

Answer: b) Water & minerals

Q. Guard cells are part of:

a) Epidermis

b) Xylem

c) Phloem

d) Cambium

Answer: a) Epidermis

Unit 7: Structural Organisation in Animals

Q. The functional unit of kidney is:

a) Nephron

b) Glomerulus

c) Bowman’s capsule

d) Neuron

Answer: a) Nephron

Q. Simple squamous epithelium is also known as:

a) Endothelium

b) Transitional epithelium

c) Columnar epithelium

d) Cuboidal epithelium

Answer: a) Endothelium

Q. The connective tissue with fluid matrix is:

a) Cartilage

b) Bone

c) Blood

d) Tendon

Answer: c) Blood

Unit 8: Cell Structure and Function

Q. Mitochondria are known as:

a) Kitchen of cell

b) Powerhouse of cell

c) Suicide bag

d) Brain of cell

Answer: b) Powerhouse of cell

Q. The 70S ribosomes are present in:

a) Mitochondria & prokaryotes

b) ER

c) Nucleus

d) Lysosomes

Answer: a) Mitochondria & prokaryotes

Q. Cell wall in fungi is made of:

a) Cellulose

b) Chitin

c) Pectin

d) Hemicellulose

Answer: b) Chitin

Unit 9: Biomolecules

Q. The building blocks of proteins are:

a) Monosaccharides

b) Amino acids

c) Fatty acids

d) Nucleotides

Answer: b) Amino acids

Q. The enzyme which catalyzes breakdown of starch is:

a) Lipase

b) Amylase

c) Maltase

d) Protease

Answer: b) Amylase

Q. DNA is a:

a) Double-stranded helix

b) Single-stranded molecule

c) Triple-stranded helix

d) Protein coat

Answer: a) Double-stranded helix

Unit 10: Cell Cycle and Cell Division

Q.G1 phase is concerned with:

a) DNA replication

b) RNA & protein synthesis

c) Chromosome segregation

d) Cytokinesis

Answer: b) RNA & protein synthesis

Q. Synapsis occurs during:

a) Prophase I

b) Metaphase I

c) Anaphase II

d) Telophase I

Answer: a) Prophase I

Q. Crossing over occurs at:

a) Chiasmata

b) Centromere

c) Chromatid

d) Spindle fibre

Answer: a) Chiasmata

Unit 11: Transport in Plants

Q. Transpiration occurs through:

a) Cuticle

b) Stomata

c) Lenticels

d) All of these

Answer: d) All of these

Q. The main pathway of water movement in roots is:

a) Symplast

b) Apoplast

c) Both

d) None

Answer: b) Apoplast

Q. Osmosis is the movement of:

a) Solvent from high conc. to low conc.

b) Solute from high conc. to low conc.

c) Solvent from low to high conc.

d) None

Answer: a) Solvent from high conc. to low conc.

Unit 12: Mineral Nutrition

Q. Nitrogen is a component of:

a) Proteins & nucleic acids

b) Fats

c) Carbohydrates

d) Water

Answer: a) Proteins & nucleic acids

Q. Chlorosis is due to deficiency of:

a) Mg, Fe, N, K

b) S, Mn

c) Ca, B

d) All

Answer: a) Mg, Fe, N, K

Q. Leghemoglobin is present in:

a) Nodules of legumes

b) Roots of monocots

c) Phloem sap

d) Xylem vessels

Answer: a) Nodules of legumes

Unit 13: Photosynthesis

Q. The first stable product of C3 cycle is:

a) PGA

b) OAA

c) PEP

d) RuBP

Answer: a) PGA

Q. Hill reaction occurs in:

a) Stroma

b) Grana

c) Cytoplasm

d) Mitochondria

Answer: b) Grana

Q. Photorespiration occurs in:

a) C3 plants

b) C4 plants

c) CAM plants

d) All

Answer: a) C3 plants

Unit 14: Respiration in Plants

Q. The end product of glycolysis is:

a) Pyruvate

b) Glucose

c) ATP

d) NADH

Answer: a) Pyruvate

Q .Number of ATP produced in aerobic respiration from 1 glucose is:

a) 2

b) 8

c) 36

d) 38

Answer: d) 38

Unit 15: Plant Growth & Development

Q. Which plant hormone is known as stress hormone?

a) Auxin

b) Cytokinin

c) Abscisic acid

d) Gibberellin

Answer: c) Abscisic acid

Q. The hormone responsible for cell elongation is:

a) Auxin

b) Ethylene

c) Cytokinin

d) ABA

Answer: a) Auxin

Q. Vernalisation is related to:

a) Flowering

b) Germination

c) Photoperiodism

d) Dormancy

Answer: a) Flowering

Unit 16: Digestion and Absorption

Q. The enzyme pepsin acts in:

a) Mouth

b) Stomach

c) Small intestine

d) Pancreas

Answer: b) Stomach

Q. Bile is secreted by:

a) Liver

b) Gall bladder

c) Pancreas

d) Stomach

Answer: a) Liver

Unit 17: Breathing and Exchange of Gases

Q. The functional unit of lungs is:

a) Bronchiole

b) Alveolus

c) Trachea

d) Pleura

Answer: b) Alveolus

Q. Oxygen is mainly transported in blood as:

a) Oxyhaemoglobin

b) Dissolved gas

c) Carbaminohaemoglobin

d) Plasma solution

Answer: a) Oxyhaemoglobin