Biology Coordination and Control MCQs Chapter 3 Class 12

Biology Coordination and Control for Second Year Entry Tests and FSC Board Exams

Coordination and Control is a key chapter in Second Year Biology that explains how organisms regulate internal processes and respond to external stimuli. This topic is highly important for students preparing for MDCAT, NUMS, AKU, NUST, UET ECAT, and FSC Second Year board exams. It covers essential concepts such as the nervous system, brain structure, spinal cord, reflex actions, sensory organs, and hormonal control, which are frequently tested in both MCQs and short-answer questions.

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Created on March 02, 2022 By Ali Durrani

Biology Ch 3 Class 12 Coordination and Control

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1 / 62

Which of the following is antagonist to Auxin in terms of promotion of stem growth?

Gibberellins

Cytokinins

Abscisic Acid

none of these.

2 / 62

The spinal nerves are functionally:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Sensory nerves

B) Motor nerves

C) Mixed nerves

D) Unknown

3 / 62

Neurotransmitters trigger action potential in the postsynaptic neuron by changing the permeability of certain _________.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Ions

C) Enzymes

B) Hormones

D) Proteins

4 / 62

The estrogen hormone secretion during the oogenesis is stimulated by:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) LH hormone

B) Inhibition hormone

C) FSH hormone

D) Testosterone hormone

5 / 62

Lymph nodes are not present:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Neck region

B) Axilla

C) Groin

D) Spleen

6 / 62

All of the following hormones are secreted from anterior lobe of pituitary gland BUT:

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Somatotropin hormone

B) Thyroid stimulating hormone

C) Antidiuretic hormone

D) Gonadotrophic hormone

7 / 62

Cell membrane under resting conditions is impermeable to all the ions except

Na+

. K+

Cl-

PO4-2

8 / 62

Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering:

Gibberellins

Cytokinins

Auxins

Ethene

9 / 62

The nerve center for sight is located in the

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Thalamus

B) Myopic

C) Both a and b

D) None of these

10 / 62

At the induction of action potential opening of Na+ gate with influx of Na+ is a _________ processes:

Active transport

Passive transport.

Diffusion

none of these.

11 / 62

The _____ may be a cell, neuron ending or an organ that receives the stimulus.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Effector

B) Receptor

C) Adopter

D) Stimuli

12 / 62

Which of the following statement about neuron is incorrect?

They not only conduct impulses but also generate them.

They are not the only cellular component of nervous system.

They may show limited regenerative capabilities.

Like all the living cell, when they mature and divide to form similar cells.

13 / 62

Which brain portion is responsible for controlling body coordination?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Medulla

B) Amygdala

C) Cerebellum

D) Pons

14 / 62

Which of the following is used in brewing industry to promote malting:

Gibberellins

Cytokinins

Auxins

Abscisic Acid

15 / 62

Which one of the following is a neurotransmitter?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Dopamine

B) Hydrochloric acid

C) Sodium ions

D) Calcium ions

16 / 62

Type of neurons found exclusively in CNS are:

Sensory neurons

Motor neurons

Associative neurons

None of these

17 / 62

Diameter of an artery can be changed by:

NUMS 2015
Biology
Coordination and Control
Elimination Tool:

A) Nervous stimulation

B) Chemical stimulation

C) Both chemical and nervous stimulation

D) None of the given options

18 / 62

Maintenance of normal resting potential via movement of K+ inside the cell and na+ out is a/an _______ process.

Active

Passive

Diffusional

None of these.

19 / 62

In an experiment, the production of hormone secretin was blocked. As a result, levels of all of the following enzymes were affected EXCEPT:

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) Trypsin

B) Pepsin

C) Chymotrypsin

D) Amylase

20 / 62

Thyroid gland requires high amount of:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Phosphate

B) Calcium

C) Iodine

D) Sodium

21 / 62

How many meninges cover the human brain?

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) 5

B) 4

C) 3

D) 2

22 / 62

Which one of the following is common to all neurons?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) A cell body which contains a nucleus

B) A thick myelin sheath

C) Presence of node of Ranvier

D) Presence of Schwann cells

23 / 62

Na+ -K+ ATPase pump is important for:

Maintenance of resting potential.

Massive out flux of K+ after depolarization.

Recovery of resting potential.

Conversion of resting potential into action potential.

24 / 62

Which body function is controlled through a positive feedback mechanism?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Labor contractions

B) Body temperature

C) Insulin production

D) Thyroxine release

25 / 62

Normal action potential of a neuronal cell is :

plus 50 mv

plus 60 mv

plus 70 mv

plus 80 mv

26 / 62

Which of the following is not the function of the cerebrum?

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Voluntary digestion

B) Thinking

C) Intelligence

D) Skeletal muscles

27 / 62

The only promoter of leaf senescence in the following plant hormones is:

Gibberellins

Cytokinins

Auxins

Abscisic Acid

28 / 62

A _____ is a junction between two neurons or between a motor neuron and a muscle cell:

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Impulse

B) Synapse

C) Axon

D) Cleft

29 / 62

Which type of the receptors are present in the ear?

Chemoreceptors

Mechanoreceptors

Photoreceptors

Thermoreceptors

30 / 62

Type of sensations carried by nociceptors are:

Touch

Temperature

Pressure

Pain

31 / 62

The autonomic nervous system controls all of the following activities except:

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) Digestion of food

B) Heart beat

C) Contraction of pupil of eye

D) Thought

32 / 62

Which hormone is chemically a steroid?

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) ADH

B) Thyroxin

C) Cortisone

D) Insulin

33 / 62

The _____ is the main nutritional part and it’s concerned with the biosynthesis of materials necessary for neurons.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Nerves

B) Axon

C) Soma

D) Dendrites

34 / 62

The gland known as the “gland of emergency” is the:

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) Pituitary

B) Adrenal

C) Thyroid

D) Parathyroid

35 / 62

Abscisic acid promotes flowering in short day plants and inhibits in long day plants, which of the following is antagonistic to abscisic acid in terms of flowering:

Gibberellins

Cytokinins

Auxins

Ethene

36 / 62

The phytohormones controlling the plant movements are?

NTS 2015 SMBBMC
Biology
Coordination and Control
Elimination Tool:

A) Auxins

B) Gibberellins

C) Abscisic acid

D) Cytokinins

E) All of the above

37 / 62

The region where the impulse moves from one neuron to another is called ______.

NTS 2012
Biology
Coordination and Control
Elimination Tool:

A) Axon

B) Dendrites

C) Synapse

D) Thalamus

38 / 62

Neurons are cells adapted for the rapid transmission of electrical impulses. To do this, they have long thin processes called:

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Axons

B) Dendrites

D) Schwann cell

C) Myelin sheath

39 / 62

Resting membrane potential of neurons is _______, while during active membrane potential the inner membrane surface becomes more _____ than the outside.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) +70 mV ; negative

B) -70 mV ; negative

C) +70 mV ; positive

D) -70 mV ; positive

40 / 62

The sense organs of taste in tongue are known as:

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Olfactory receptors

B) Gustatory receptors

C) Cutaneous receptors

D) All of these

41 / 62

Hepatic and Pancreatic secretions are also stimulated by a hormone called:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Gastrin

B) Secretin

C) Insulin

D) Glucagon

42 / 62

Which of the following is not secreted by thyroid gland?

NTS 2015 SMBBMC
Biology
Coordination and Control
Elimination Tool:

A) Thyroxin

B) Triiodothyronine

C) Calcitonin

D) Glucagon

43 / 62

Which type of sensory structures carry deep pressure and vibration sensations?

Hair end organs

Meissner's Corpuscles.

Pacinian corpuscles.

none of these.

44 / 62

The correct option about spinal nerves is:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) 33 pairs

B) Mostly mixed nerves

C) Dorsal root contains sensory neurons

D) Ventral root contains motor neurons

E) C and D both

45 / 62

Deficient production of hormones by adrenal glands results in: .

NTS 2011
Biology
Coordination and Control
Elimination Tool:

A) Cushing's syndrome

B) Addison's disease

C) Diabetes Mellitus

D) Goiter

46 / 62

Type of neurons found exclusively in CNS are:

Sensory neurons

Motor neurons

Associative neurons

None of these

47 / 62

Chlorosis, i.e., yellowish hue on the leaves results from

Accumulation of toxic waste products in leaves.

Deficiency of chlorophyll.

Short supplies of mineral nutrients in the soil

All of these

48 / 62

Which type of sensory structures carrying the touch sensations are present in papillae extending into ridges of the fingertips?

Hair end organs

Meissner's Corpuscles.

Pacinian corpuscles.

None of these.

49 / 62

Nissl’s granules are present in which part of the neuron?

Axoplasm

Myelin sheath.

Dendrite

Soma

50 / 62

Which of the following neurotransmitters function, both as neurotransmitter and hormones, decreasing our perception of pain?

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Epinephrine

B) Serotonin

C) Dopamine

D) Endorphins

51 / 62

Direction of reflex action is from:

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Receptor to sensory neuron to motor neuron and then through associative neurons to effect.

B) Receptor to sensory neuron to associative neuron and then through motor neurons to effector.

C) Effector to sensory neuron to associative neuron and then through motor neurons to Receptor.

D) Effector to sensory neuron to motor neuron and then through associative neurons to Receptor.

52 / 62

The 1st human hormone produced by recombinant DNA technology was:

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) Estrogen

B) Testosterone

C) Cortisone

D) Insulin

53 / 62

_________ is sometimes given by injection as an emergency treatment in cardiac arrest:

NUMS 2020
Biology
Coordination and Control
Elimination Tool:

A) Acetylcholine

B) Dopamine

C) Serotonin

D) Epinephrine

54 / 62

In plants, ______ hormone promotes closing of stomata in drought conditions.

NUMS 2019 Reconduct
Biology
Coordination and Control
Elimination Tool:

A) Ethene

B) Gibberellins

C) Cytokinins

D) Abscisic acid

55 / 62

Chemically auxins are

Indole propionic acid.

Indole carboxylic acid.

Indole acetaldehyde

Indole acetic acid

56 / 62

Four events in the transmission of nerve impulses across synapses are:

I. depolarisation of the presynaptic membrane

II. propagation of postsynaptic action potential

III. reabsorption of the transmitter substance

IV. release of transmitter substance into the synaptic cleft

In which sequence do these events occur?

FIRST -> LAST

NTS 2014
Biology
Coordination and Control
Elimination Tool:

A) I, III, II, and IV

C) IV, I, III and II

D) IV, III, I and II

B) I, IV, II and III

57 / 62

On land, frogs are:

NUMS 2014
Biology
Coordination and Control
Elimination Tool:

A) Hypermetric

B) Cerebral cortex

C) Normal sighted

D) None of these

58 / 62

Gibberellins may be substituted for _____ light, therefore promote flowering in long day plants.

White

Red

Blue

Green

59 / 62

The prolactin hormone, responsible for the activation of mammary glands to start producing milk, is a hormone of the:

NTS 2010
Biology
Coordination and Control
Elimination Tool:

A) Pituitary gland

B) Pancreas

C) Thyroid gland

D) Thymus gland

60 / 62

Normal resting membrane potential of a neuron is

50 mv

60 mv

70 mv

80 mv

61 / 62

The directional movement toward or away from the stimulus is called:

PMC 2020
Biology
Coordination and Control
Elimination Tool:

A) Tropism

B) Orientation

C) Taxi

D) Non orientation

62 / 62

Which of the following is the function of adrenaline?

NUMS 2016
Biology
Coordination and Control
Elimination Tool:

A) To increase the rate of breathing

B) To increase the heart rate

C) To increase the level of calcium in blood

D) Both A and B

Your score is

The average score is 62%

Importance of Coordination and Control in Competitive Biology

A clear understanding of Coordination and Control helps students explain nerve impulse transmission, reflex arcs, endocrine regulation, and feedback mechanisms. Topics such as neurons, synapses, hormone functions, and major glands like thyroid and pancreas are commonly asked in entry tests. Practicing chapter-wise MCQs, diagrams, and topic-wise exercises improves conceptual clarity, enhances problem-solving skills, and strengthens performance under exam conditions.

Effective Preparation and Practice Resources for Second Year Students

An effective preparation strategy includes systematic revision, MCQ practice, and mock testing. Reviewing past papers and exam-focused questions helps students identify key areas and frequently tested concepts. PLS Academy provides structured learning resources that allow students to master Coordination and Control and perform confidently in medical entry tests and FSC Second Year board examinations.

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Biology Coordination and Control MCQs Chapter 3 Class 12

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