Biology MCQs

Option A: 1

Option B: 2

Option C: 3

Option D: 4

Correct Answer: 3 ✔

Option A: 1%

Option B: 2%

Option C: 3%

Option D: 4%

Correct Answer: 2% ✔

Option A: NADH

Option B: Cytochrome a3

Option C: Water

Option D: Oxygen

Correct Answer: Oxygen ✔

Option A: Brain

Option B: Heart

Option C: Liver

Option D: Muscles

Correct Answer: Muscles ✔

Option A: Chlorophyll a

Option B: Chlorophyll b

Option C: Xanthophyll

Option D: Carotenes

Correct Answer: Chlorophyll a ✔

Option A: Hydrophilic

Option B: Hydrophobic

Option C: Both of these

Option D: None of these

Correct Answer: Hydrophobic ✔

Option A: Acetaldehyde

Option B: Methyl alcohol

Option C: Ethyl alcohol

Option D: Lactic acid

Correct Answer: Ethyl alcohol ✔

Option A: Magnesium

Option B: Iron

Option C: Chlorine

Option D: Oxygen

Correct Answer: Magnesium ✔

Option A: Orange – blue

Option B: Violet – red

Option C: Yellow – orange

Option D: Orange – red.

Correct Answer: D. Orange – red. ✔

Option A: Alcoholic fermentation

Option B: Lactic acid fermentation

Option C: Aerobic respiration

Option D: All of these

Correct Answer: Aerobic respiration ✔

Option A: Yellow

Option B: Red

Option C: Orange

Option D: Green

Correct Answer: Yellow ✔

Option A: Nucleus

Option B: Cytosol

Option C: Mitochondria.

Option D: Ribosomes

Correct Answer: ✔

Option A: Stroma

Option B: Grana

Option C: Thylakoid

Option D: Intergrana

Correct Answer: Thylakoid ✔

Option A: Grana

Option B: Stroma

Option C: Thylakoid

Option D: None of these

Correct Answer: Stroma ✔

Option A: 680 nm

Option B: 100 m

Option C: 700 nm

Option D: 670 nm

Correct Answer: 680 nm ✔

Option A: Leaves respire and utilize O2 and release CO2.

Option B: Stems

Option C: Roots

Option D: Branches

Correct Answer: Leaves respire and utilize O2 and release CO2. ✔

Option A: Antenna complex

Option B: Reaction centre

Option C: Photosystem

Option D: None of these

Correct Answer: Antenna complex ✔

Option A: Grana

Option B: Stroma

Option C: Nucleus

Option D: None of these

Correct Answer: Grana ✔

Option A: assimilatory power

Option B: chemical energy

Option C: energized electrons

Option D: All of these

Correct Answer: All of these ✔

Option A: Thylakoid

Option B: Storma

Option C: Chloroplast

Option D: Grana

Correct Answer: Grana ✔

Option A: O2

Option B: CO2

Option C: H2O

Option D: light energy

Correct Answer: O2 ✔

Option A: Chlorophyll a

Option B: Chlorophyll b.

Option C: Chlorophyll c

Option D: Chlorophyll d.

Correct Answer: Chlorophyll a ✔

Option A: 0.03 – 0.04%

Option B: 10%

Option C: 1-2 %

Option D: 50%

Correct Answer: 1-2 % ✔

Option A: C55H72O5N4Mg

Option B: C55H70O6N4Mg

Option C: C50H72O6N4Mg

Option D: C55H70O5N4Mg

Correct Answer: C55H72O5N4Mg ✔

Option A: 1-2%

Option B: 5%

Option C: 10%

Option D: 20%

Correct Answer: 10% ✔

Option A: It is a porphyrin ring or tetrapyrrole ring structure

Option B: It is flat, square and light absorbing

Option C: Composed of carbon and nitrogen atoms with Magnesium as central metal ion, which is coordinated with nitrogen.

Option D: It is hydrophobic

Correct Answer: It is hydrophobic ✔

Option A: Blue

Option B: Orange

Option C: Red

Option D: Violet

Correct Answer: Red ✔

Option A: Carbon tetrachloride

Option B: Alcohol

Option C: Organic solvents

Option D: Water

Correct Answer: Water ✔

Option A: Algae

Option B: Fungi

Option C: Bacteria

Option D: Spirogyra

Correct Answer: Spirogyra ✔

Option A: Orange

Option B: Red

Option C: Green

Option D: Both A and B

Correct Answer: Both A and B ✔

Option A: T.W.Englemam

Option B: Malleus

Option C: T.W.Inws

Option D: W.Stapes

Correct Answer: T.W.Englemam ✔

Option A: Orange

Option B: Red

Option C: Blue

Option D: Green

Correct Answer: Green ✔

Option A: 20%

Option B: 15%

Option C: 10%

Option D: 1%

Correct Answer: 1% ✔

Option A: 300 – 700 nm in wavelength

Option B: 350 – 750 nm in wavelength

Option C: 380 – 750 nm in wavelength

Option D: 390 – 790 nm in wavelength.

Correct Answer: C. 380 – 750 nm in wavelength ✔

Option A: 600

Option B: 650

Option C: 680

Option D: 700

Correct Answer: 700 ✔

Option A: Bacteria

Option B: Algae

Option C: Protenema

Option D: Cyanobacteria

Correct Answer: Bacteria ✔

Option A: 0.02-0.03

Option B: 0.03-0.04

Option C: 0.04-0.05

Option D: 0.05-0.06

Correct Answer: 0.03-0.04 ✔

Option A: Neutral point

Option B: Compensation point

Option C: Parallel point

Option D: Competitive point

Correct Answer: Compensation point ✔

Option A: 1 molecule

Option B: 6 molecules

Option C: 3 molecules

Option D: 0 molecule

Correct Answer: 0 molecule ✔

Option A: 10%

Option B: 20%

Option C: 30%

Option D: 40%

Correct Answer: 10% ✔

Option A: Glycolysis

Option B: Respiration

Option C: Photosynthesis

Option D: Kreb’s cycle

Correct Answer: Photosynthesis ✔

Option A: Animals

Option B: Plants

Option C: Both of these

Option D: None of these

Correct Answer: Both of these ✔

Option A: Plants

Option B: Animals

Option C: Omnivores

Option D: Fungi

Correct Answer: Plants ✔

Option A: Bioenergetics

Option B: Laws of thermodynamics

Option C: Laws of thermo chemistry

Option D: Laws of chemical energetic

Correct Answer: Laws of thermodynamics ✔

Option A: Leaves respire and utilize O2 and release CO2.

Option B: Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants.

Option C: Rate of photosynthesis increases, so do the O2 production, with a net release of oxygen coupled with the uptake of CO2.

Option D: Rate of respiration becomes more than rate of photosynthesis.

Correct Answer: Photosynthesis and respiration occur at same rate. So there is not net exchange of gases between atmosphere and plants. ✔

Option A: C55 H10 O4 N6 Mg

Option B: C55 H70 O6 N5 Mg

Option C: C55 H71 O6 N4 Mg

Option D: C55 H70 O6 N4 Mg

Correct Answer: C55 H70 O6 N5 Mg ✔

Option A: Day time.

Option B: Night time.

Option C: Dawn & Dusk.

Option D: Mid night.

Correct Answer: Dawn & Dusk. ✔

Option A: Chlorophyll e

Option B: Chlorophyll d

Option C: Chlorophyll a

Option D: Chlorophyll c

Correct Answer: Chlorophyll a ✔

Option A: Photosynthesis

Option B: Aerobic respiration

Option C: Anaerobic respiration

Option D: Respiration

Correct Answer: Aerobic respiration ✔

Option A: Organic

Option B: Energy rich

Option C: Energy poor

Option D: Reduced

Correct Answer: Energy poor ✔

Option A: AMP

Option B: ADP

Option C: ATP

Option D: All of these

Correct Answer: ATP ✔

Option A: Conduction

Option B: Regeneration

Option C: Reflex

Option D: Movement

Correct Answer: Regeneration ✔

Option A: Chemical

Option B: Mechanical

Option C: Photo

Option D: Nociceptors

Correct Answer: Mechanical ✔

Option A: 0.03 V

Option B: 0.05 V

Option C: 0.07 V

Option D: 0.09V

Correct Answer: 0.07 V ✔

Option A: Parkinson’s disease

Option B: Epilepsy

Option C: Alzheimer’s discease

Option D: Dementia

Correct Answer: Epilepsy ✔

Option A: Cerebrum

Option B: Cerebellum

Option C: Thalamus

Option D: Hypothalamus

Correct Answer: Cerebellum ✔

Option A: Cerebrum

Option B: Cerebellum

Option C: Thalamus

Option D: Hypothalamus

Correct Answer: Hypothalamus ✔

Option A: Cerebrum

Option B: Cerebellum

Option C: Thalamus

Option D: Hypothalamus

Correct Answer: Cerebrum ✔

Option A: Cerebrum

Option B: Cerebellum

Option C: Thalamus

Option D: Hypothalamus

Correct Answer: Cerebellum ✔

Option A: Cerebrum

Option B: Cerebellum

Option C: Medulla oblongata

Option D: Thalamus

Correct Answer: Cerebrum ✔

Option A: Brain

Option B: Spinal cord

Option C: Both of these

Option D: none of these.

Correct Answer: Spinal cord ✔

Option A: Brain

Option B: Spinal cord

Option C: Hypothalamus

Option D: none of these.

Correct Answer: Spinal cord ✔

Option A: Brain

Option B: Spinal cord

Option C: Both of these

Option D: none of these

Correct Answer: Both of these ✔

Option A: Na+

Option B: K+

Option C: Fe

Option D: none of these

Correct Answer: Na+ ✔

Option A: Outer surface of neuron is more positive

Option B: Inner surface of neuron is more positive

Option C: Both of these surfaces are equally positive

Option D: none of these.

Correct Answer: Outer surface of neuron is more positive ✔

Option A: To allow nerve impulse to move in backward direction

Option B: To decrease the speed of nerve impulse

Option C: To stop the nerve impulse

Option D: To provide cytoplasmic connection between neurons.

Correct Answer: To decrease the speed of nerve impulse ✔

Option A: Transmitters

Option B: Synapses

Option C: Pores

Option D: Nodes

Correct Answer: Synapses ✔

Option A: Dendrites

Option B: Axon

Option C: Both of these

Option D: none of these

Correct Answer: Dendrites ✔

Option A: Sensory neuron

Option B: Motor neuron

Option C: Associative neuron

Option D: none of these.

Correct Answer: Sensory neuron ✔

Option A: Sensory neuron

Option B: Motor neuron

Option C: Associative neuron

Option D: none of these.

Correct Answer: Sensory neuron ✔

Option A: Sensory neuron

Option B: Motor neuron

Option C: Associative neuron

Option D: none of these.

Correct Answer: Sensory neuron ✔

Option A: Ganglia

Option B: Longitudinal nerves

Option C: Lateral nerves

Option D: none of these

Correct Answer: none of these ✔

Option A: Nervous system

Option B: Endocrine system

Option C: Both of these

Option D: none of these.

Correct Answer: Both of these ✔

Option A: Brain

Option B: Nerves

Option C: Neuron-cells

Option D: All of these

Correct Answer: Neuron-cells ✔

Option A: Muscles

Option B: Glands

Option C: Sensory organs

Option D: Both ‘a’ & ‘b’

Correct Answer: D. Both ‘a’ & ‘b’ ✔

Option A: Regulation of body functions

Option B: Organization of body functions

Option C: Integration of body functions

Option D: All of these

Correct Answer: All of these ✔

Option A: Stimulus

Option B: Variation

Option C: Response

Option D: Reaction

Correct Answer: Stimulus ✔

Option A: Receptors

Option B: Neurons

Option C: Effectors

Option D: All of these

Correct Answer: Receptors ✔

Option A: 100 m/sec

Option B: 110 m/sec

Option C: 120m/sec

Option D: 130 m/sec.

Correct Answer: 120m/sec ✔

Option A: Hydra

Option B: Man

Option C: Planaria

Option D: Cockroach

Correct Answer: Hydra ✔

Option A: Maintenance of resting potential

Option B: Massive out flux of K+ after depolarization

Option C: Recovery of resting potential

Option D: Conversion of resting potential into action potential

Correct Answer: Recovery of resting potential ✔

Option A: 10

Option B: 11

Option C: 12

Option D: 13

Correct Answer: 12 ✔

Option A: plus 50 mv

Option B: plus 60 mv

Option C: plus 70 mv

Option D: plus 80 mv

Correct Answer: plus 50 mv ✔

Option A: Myxedema

Option B: Cretinism

Option C: Goiter

Option D: Exopthalmic goiter

Correct Answer: Myxedema ✔

Option A: – 50 mv

Option B: – 60 mv

Option C: – 70 mv

Option D: – 80 mv

Correct Answer: C. – 70 mv ✔

Option A: Protein

Option B: Amino acid derivative

Option C: Polypeptide

Option D: Steroid

Correct Answer: Protein ✔

Option A: Active transport

Option B: Passive transport

Option C: Diffusion

Option D: none of these

Correct Answer: Passive transport ✔

Option A: Anterior pituitary

Option B: Median pituitary

Option C: Posterior pituitary

Option D: None of these

Correct Answer: Median pituitary ✔

Option A: Undersecretion of thyroxin

Option B: Overproduction of thyroxin

Option C: Undersecretion of corticosteroids

Option D: Overproduction of corticosteroids

Correct Answer: Overproduction of thyroxin ✔

Option A: Na+

Option B: K+

Option C: Cl-

Option D: PO4-2

Correct Answer: K+ ✔

Option A: Active

Option B: Passive

Option C: Diffusional

Option D: None of these.

Correct Answer: Active ✔

Option A: Sensory neurons

Option B: Motor neurons

Option C: Associative neurons

Option D: None of these

Correct Answer: Associative neurons ✔

Option A: Stomach

Option B: Liver

Option C: Pancreas

Option D: Duodenum

Correct Answer: Duodenum ✔

Option A: They not only conduct impulses but also generate them

Option B: They are not the only cellular component of nervous system

Option C: They may show limited regenerative capabilities

Option D: Like all the living cell, when they mature and divide to form similar cells

Correct Answer: Like all the living cell, when they mature and divide to form similar cells ✔

Option A: Produce chemical messengers

Option B: Release chemical messengers in extracellular space

Option C: Homestatic in function

Option D: Having slow but prolonged effects

Correct Answer: Having slow but prolonged effects ✔

Option A: Axoplasm

Option B: Myelin sheath

Option C: Dendrite

Option D: Soma

Correct Answer: Soma ✔

Option A: Kinesis

Option B: Taxes

Option C: Instinct

Option D: Learning

Correct Answer: Kinesis ✔

Option A: Thorpe

Option B: Darwin

Option C: Pavlov

Option D: Kohler

Correct Answer: Darwin ✔

Option A: Imprinting

Option B: Habituation

Option C: Insight learning

Option D: Latent learning

Correct Answer: Habituation ✔

Option A: Hair end organs

Option B: Meissner’s Corpuscles

Option C: Pacinian corpuscles

Option D: none of these

Correct Answer: Pacinian corpuscles ✔