Biology set 1 MCQs

Practice interactive objective questions for this topic. Select an option to instantly verify your answer and read detailed explanations.

Showing 605 questions
Q.511 The 'Functional Residual Capacity' (FRC) of the lungs is the sum of
A Tidal Volume + Residual Volume
B Expiratory Reserve Volume + Residual Volume
C Inspiratory Reserve Volume + Tidal Volume
D Vital Capacity + Residual Volume
Discuss / Board
Q.512 Which 'Phytohormone' is primarily used to induce rooting in stem cuttings
A Cytokinins
B Gibberellins
C Auxins
D Ethylene
Discuss / Board
Q.513 The 'Islets of Langerhans' contribute what percentage to the total weight of the pancreas
A 98-99%
B 50%
C 1-2%
D 25%
Discuss / Board
Q.514 Identify the 'Application': Why do cells of a salt-water fish burst when placed in fresh water
A Exosmosis occurs
B Endosmosis occurs
C Active transport stops
D The cell wall is too weak
Discuss / Board
Q.515 The 'Nerve Impulse' jump from one node of Ranvier to another is known as
A Continuous conduction
B Saltatory conduction
C Synaptic delay
D Refractory period
Discuss / Board
Q.516 In a DNA molecule the percentage of 'Adenine' is 30% What would be the percentage of 'Guanine'
A 30%
B 70%
C 20%
D 40%
Discuss / Board
Q.517 Identify the correctly matched 'Excretory Organ' and the animal
A Flame cells - Earthworm
B Malpighian tubules - Cockroach
C Nephridia - Flatworm
D Antennal glands - Snail
Discuss / Board
Q.518 Which specific 'Bio-molecule' is tested using the 'Biuret Test'
A Carbohydrates
B Lipids
C Proteins
D Nucleic acids
Discuss / Board
Q.519 The 'Primary Productivity' of an ecosystem is limited by which factor in the ocean
A Water
B Temperature
C Nutrients (like Nitrogen and Iron)
D Oxygen
Discuss / Board
Q.520 Which of the following organelles is called 'Cell within a Cell'
A Ribosome
B Chloroplast
C Golgi body
D Endoplasmic Reticulum
Discuss / Board
Q.521 Identify the enzyme secreted by the 'Stomach' that helps in the digestion of fats in infants
A Pepsin
B Gastric Lipase
C Trypsin
D Steapsin
Discuss / Board
Q.522 Which among the following is a 'C4' plant
A Rice
B Wheat
C Maize
D Potato
Discuss / Board
Q.523 The 'Universal' genetic code consists of how many codons
A 20
B 64
C 46
D 32
Discuss / Board
Q.524 Which 'Immunoglobulin' is involved in allergic reactions and provides protection against parasitic worms
A IgG
B IgA
C IgE
D IgD
Discuss / Board
Q.525 The 'Loop of Henle' is longest in which of the following animals
A Fresh water fish
B Desert Rat (Kangaroo Rat)
C Amphibians
D Humans
Discuss / Board
Q.526 In the human eye 'Glaucoma' is primarily caused by
A Opacity of the lens
B Damage to the optic nerve due to high intraocular pressure
C Bacterial infection of the conjunctiva
D Detachment of the retina
Discuss / Board
Q.527 Which specific 'Bacteria' is used in the large scale production of human insulin (Humulin)
A Agrobacterium tumefaciens
B Escherichia coli
C Bacillus thuringiensis
D Rhizobium leguminosarum
Discuss / Board
Q.528 Identify the 'Tricky' hormone: Which of the following is an amino-acid derivative
A Insulin
B Epinephrine (Adrenaline)
C Estrogen
D Glucagon
Discuss / Board
Q.529 In the human skeletal system 'Suture' joints in the skull are examples of
A Slightly movable joints
B Freely movable joints
C Immovable (Fibrous) joints
D Synovial joints
Discuss / Board
Q.530 The 'Pleura' is a double-layered membrane that covers the
A Heart
B Lungs
C Kidneys
D Brain
Discuss / Board
Q.531 Which of the following describes 'Genetic Drift' accurately
A Change in gene frequency due to natural selection
B Random change in gene frequencies in a small population
C Movement of genes from one population to another
D Creation of new alleles through radiation
Discuss / Board
Q.532 The 'Islets of Langerhans' secrete 'Pancreatic Polypeptide' from which cells
A Alpha cells
B Beta cells
C PP cells (or F cells)
D Delta cells
Discuss / Board
Q.533 Which of the following is an example of 'Bio-magnification' in an aquatic ecosystem
A Increase in water level
B Accumulation of DDT in fish-eating birds
C Increase in fish population
D Depletion of minerals
Discuss / Board
Q.534 Identify the 'Correct' sequence of bones in the human middle ear from outside to inside
A Stapes Incus Malleus
B Malleus Incus Stapes
C Incus Malleus Stapes
D Stapes Malleus Incus
Discuss / Board
Q.535 Which enzyme is responsible for the 'Fixation' of CO2 in C3 plants
A PEP Carboxylase
B RuBisCO
C Hexokinase
D Pyruvate kinase
Discuss / Board
Q.536 The 'Vagus Nerve' (Cranial nerve X) is primarily responsible for
A Sense of smell
B Vision
C Parasympathetic control of heart and digestive tract
D Facial expressions
Discuss / Board
Q.537 Which of the following is a 'Polysaccharide' found in the exoskeletons of insects
A Cellulose
B Starch
C Chitin
D Glycogen
Discuss / Board
Q.538 Which of the following is a 'Cyanobacterium' (Blue-green algae) used as a bio-fertilizer in paddy fields
A Spirogyra
B Anabaena
C Chlamydomonas
D Ulothrix
Discuss / Board
Q.539 In the process of 'Fermentation' in muscle cells the end product is
A Ethanol and CO2
B Lactic acid and ATP
C Pyruvate and Water
D Glucose and Oxygen
Discuss / Board
Q.540 The 'Genetic' code is said to be 'Degenerate' because
A One codon codes for many amino acids
B One amino acid can be coded by more than one codon
C The code is not the same for all organisms
D It changes over time
Discuss / Board

Master Biology set 1 for All Competitive Exams 2026

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