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Free Coordination and Control MCQs with Answers

1,687 Coordination and Control MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.

Coordination depends on receptors, neurons, synapses and nerve impulses, with reflex actions traced through the reflex arc and the roles of major brain regions. Chemical coordination covers endocrine glands and hormones, including how hormones regulate growth, metabolism, reproduction and internal balance, unlike rapid nervous control.

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ReceptorsNeurons and Nerve ImpulseReflexes and the Reflex ArcBrainChemical Coordination and Hormones
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1,687 questions · page 73 of 85

1441. Four healthy people in their twenties got involved in injuries resulting in damage and death of few cells of the following. Which of the cells are least likely to be replaced by new cells?

  • A. Liver cells
  • B. Neurons
  • C. Malpighian layer of the skin
  • D. Osteocytes

Explanation: Neurons are least likely to be replaced because most neurons in the central nervous system are non-dividing (post-mitotic).

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Correct answer: Neurons

1442. Which one of the following pairs of structures distinguishes a nerve cell from other types of cell?

  • A. Vacuoles and fibres
  • B. Flagellum and medullary sheath
  • C. Nucleus and mitochondrion
  • D. Perikaryon and dendrites

Explanation: Neuron (nerve cell) is one of the basic functional units of the nervous system.

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Correct answer: Perikaryon and dendrites

1443. Which one of the following is correct match?

  • A. Reserpine tranquilliser
  • B. Cocaine opiatic narcotic
  • C. Morphine hallucinogenic
  • D. Bhang analgesic

Explanation: Tranquillisers are drugs that have good effect in all types of psychosis, especially in schizophrenia.

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Correct answer: Reserpine tranquilliser

1444. Opiate narcotic is

  • A. Bhang
  • B. Charas
  • C. Heroin
  • D. Nicotine

Explanation: The drugs derived from opium alongwith their synthetic relatives are called opioids or opiates.

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Correct answer: Heroin

1445. Select the correct statement from the ones given below:

  • A. Barbiturates, when given to criminals, make them tell the truth
  • B. Morphine is often given to person who have undergone surgery, as a pain killer
  • C. Chewing tobacco lowers blood pressure and heart rate
  • D. Cocaine is given to patients after surgery as it stimulates recovery

Explanation: Morphine is a potent opioid analgesic used mainly to relieve severe and persistent pain, particularly in terminally ill patients or who…

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Correct answer: Morphine is often given to person who have undergone surgery, as a pain killer

1446. In animals coordination is achieved by:

  • A. Hormones
  • B. Nervous system and endocrine system
  • C. Gastrointestinal system
  • D. Endocrine system

Explanation: A. Involved in the coordination of plantsB. Involved in food digestionC Controls various body functions

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Correct answer: Nervous system and endocrine system

1447. Bananas can be prevented from overripening by

  • A. Maintaining them at room temperature
  • B. Refrigeration
  • C. Dipping in ascorbic acid solution
  • D. Storing in a freezer

Explanation: The correct answer is Option C: dipping in ascorbic acid solution. Ascorbic acid acts as an antioxidant and can inhibit the effects of…

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Correct answer: Dipping in ascorbic acid solution

1448. What causes a green plant exposed to the light on only one side, to bend toward the source of light as it grows?

  • A. Light stimulates plant cells on the lighted side to grow faster
  • B. Auxin accumulates on the shaded side, stimulating greater cell elongation there
  • C. Green plants need light to perform photosynthesis
  • D. Green plants seek light because they are phototropic

Explanation: The phenomenon described in the question is known as phototropism, which is the growth or bending of a plant in response to light.

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Correct answer: Auxin accumulates on the shaded side, stimulating greater cell elongation there

1449. Animals have the innate ability to escape from predation. Examples for the same are given below. Select the incorrect example.

  • A. Colour change in Chamaeleon.
  • B. Enlargement of body size by swallowing air in puffer fish.
  • C. Poison fangs in snakes
  • D. Melanism in moths.

Explanation: Colour change in Chameleon and melanism in moths are examples of camouflage in animals adapted to prevent predation from prey.

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Correct answer: Poison fangs in snakes

1450. Find the Error.The Managing Director (A), together with (B) his heads of different departments (C),have been (D) preparing a new budget.

  • A. The Managing Director
  • B. Together with
  • C. Different departments
  • D. Have been

Explanation: The main subject of the sentence is 'The Managing Director', which is singular.

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Correct answer: Have been

1451. Spot the error.The soldiers had to move the west for better management during the war.

  • A. The soldiers
  • B. The west
  • C. Better management
  • D. The war

Explanation: The correct answer is Option B: 'The west'. In the sentence, 'west' is a cardinal direction and does not require the article 'the'.

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Correct answer: The west

1452. Select the most suitable synonym for the given word:BEWILDERMENT

  • A. Totalitarian
  • B. Democratic
  • C. Clarity
  • D. Puzzlement

Explanation: Bewilderment is a term often used to describe the feeling of being confused and perplexed.

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Correct answer: Puzzlement

1453. Each time a new social media site is revealed, it becomes a ----- for a while and then slowly fades into obscurity.

  • A. Phenomena
  • B. Phenomenas
  • C. Phenomenon
  • D. Phenomenons

Explanation: The correct answer is 'Phenomenon' because it is the singular form that accurately describes a single event or occurrence.

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Correct answer: Phenomenon

1454. Passage: There is a family of six persons G, J, B, E, T and Z. Their professions are teacher, writer, actor, singer, dancer and lawyer but not respectively in the same order. G is a teacher. Z is a dancer. B is neither writer nor actor. E is neither singer nor lawyer. T is an actor. J is a lawyer. Who among them has a profession of lawyer?

  • A. J
  • B. B
  • C. E
  • D. T

Explanation: The passage explicitly states, "J is a lawyer." Therefore, J is the person with the profession of a lawyer.

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Correct answer: J

1455. Statements: I. The State Government has announced a special tax package for the new industries to be set up in the state. II. Last year the State Government had hiked the taxes for all industrial activities in the State.

  • A. Statement I is the cause and statement II is its effect
  • B. Statement II is the cause and statement I is its effect
  • C. Both the statements I and II are independent causes
  • D. Both the statements I and II are effects of independent causes

Explanation: A tax hike (Statement II) could have discouraged new investment or caused economic slowdown.

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Correct answer: Statement II is the cause and statement I is its effect

1456. Statement: It is reported that though Vitamin E present in fresh fruits and vegetables is beneficial for the human body, capsule Vitamin E does not have the same effect on the human body.Courses of Action:I. The sale of capsule Vitamin E should be banned.II. People should be encouraged to take fresh fruits and vegetables to meet the body's requirement of Vitamin E.

  • A. Only I follows
  • B. Only II follows
  • C. Either I or II follows
  • D. Neither I nor II follows
  • E. Both I and II follow

Explanation: The statement highlights that while Vitamin E from fresh produce is beneficial, the capsule form is not.

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Correct answer: Only II follows

1457. Statements: From the next academic year, students will have the option of dropping Mathematics and Science for their school leaving certificate examination.Conclusions:I. Students who are weak in Science and Mathematics will be admitted.II. Earlier students did not have the choice of continuing their education without taking these subjects.

  • A. Only conclusion I follows
  • B. Only conclusion II follows
  • C. Either I or II follows
  • D. Neither I nor II follows
  • E. Both I and II follow

Explanation: The correct answer is that only conclusion II follows. The statement indicates that from the next academic year, there will be an option…

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Correct answer: Only conclusion II follows

1458. If 'A' means 'subtraction', 'B' means 'division', 'C' means 'addition' and 'D' means 'multiplication', then330 B 6 A 32 C 45 D 12 = ?

  • A. 525
  • B. 547
  • C. 582
  • D. 563

Explanation: Substituting the operators, the expression becomes 330 ÷ 6- 32 + 45 × 12.

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Correct answer: 563

1459. In this question, a statement is given followed by two courses of action numbered I and II. It is required to grasp the statement, analyze the problem or policy it mentions and then decide which of the courses of action logically follow / most appropriate.Statement:As many as ten coaches of a passenger train have derailed and blocked both pairs of the railway tracks.Courses of action:I) The railway authorities should immediately send men and equipment to the spot to clear the railway tracks.II) All the trains running in both the directions should be diverted to other routes.

  • A. If only I follows
  • B. If only II follows
  • C. If either I or II follows
  • D. If neither I nor II follows
  • E. If both I and II follow

Explanation: The correct answer is Option E: If both I and II follow. When a train derails and blocks tracks, two immediate actions are required…

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Correct answer: If both I and II follow

1460. The given diagram shows neurons connecting the eye with the central nervous system.With reference to the given diagram, neuron I and neuron II are identified as

  • A. Relay, Sensory
  • B. Sensory, Motor
  • C. Motor, Relay
  • D. Relay, Motor

Explanation: Neuron 1 is sensory as it carries impulses towards the brain whereas neuron 2 is motor as it carries impulses from the brain to eye.

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Correct answer: Sensory, Motor
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