This free nervous system MCQ test is the eleventh set in our 72nd BPSC practice series and the second biology set. Its 25 questions draw on the NCERT Class 11 chapters on locomotion and movement, neural control and coordination, and chemical coordination: the sliding-filament basics, bones and joints, nerve impulses and synapses, the parts of the brain, the eye and ear, and the main hormones. Each question shows the correct answer and an explanation as soon as you choose an option, and you can work out your score with BPSC-style negative marking at the end. For more practice, see our free BPSC mock test series.
What this test covers: The sarcoplasmic reticulum, acetylcholine, troponin, red fibres, the axial skeleton, vertebral regions, the femur, pivot and hinge joints, tetany, afferent fibres, depolarisation, electrical synapses, forebrain and hindbrain, the corpus callosum, the layers of the eye, the labyrinth, gonadotrophins, melatonin, adrenaline, insulin and steroid hormones.
Locomotion, Nervous System & Endocrine Glands
25 questions · NCERT Class 11 Biology · BPSC prelims pattern
How this test works
Click the option you think is right. It locks, turns green if correct or red if not, and the explanation opens underneath. Your score updates in the bar at the top as you go, and Calculate final score at the bottom gives the full breakdown. Choose (E) Not attempted when you would only be guessing, exactly as you would bubble E on the BPSC OMR sheet.
+1 mark — Correct answer
−1/3 mark — Wrong answer
0 — no penalty — (E) Not attempted, the fifth bubble on every question
−1/3 mark — Row left completely blank in the real exam
Locomotion & movement10 questions
1. The sarcoplasmic reticulum of a muscle fibre primarily serves as a storehouse of:
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Answer: (B) Calcium ions
The sarcoplasmic reticulum stores calcium ions, which are released into the sarcoplasm when a neural signal reaches the muscle fibre.
2. Which neurotransmitter is released at the neuromuscular junction?
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Answer: (B) Acetylcholine
Acetylcholine is the neurotransmitter released at the neuromuscular junction, generating an action potential in the sarcolemma.
3. During muscle contraction, calcium ions directly bind to:
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Answer: (B) Troponin
Calcium binds to a subunit of troponin on the actin filament, exposing the active sites for myosin to form cross-bridges.
4. Red muscle fibres contain relatively large amounts of:
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Answer: (A) Myoglobin and mitochondria
Red fibres contain plenty of myoglobin and mitochondria, which suit aerobic respiration; white fibres have little myoglobin and more sarcoplasmic reticulum.
5. Which of the following belongs to the axial skeleton?
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Answer: (C) Sternum
The axial skeleton comprises the skull, vertebral column, sternum and ribs. The femur, scapula and humerus belong to the appendicular skeleton.
6. Which sequence correctly represents the regions of the vertebral column from skull downward?
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Answer: (A) Cervical → thoracic → lumbar → sacral → coccygeal
From the skull downward the vertebral column has 7 cervical, 12 thoracic, 5 lumbar, 1 sacral (fused) and 1 coccygeal (fused) vertebrae.
7. Which bone is described as the longest bone of the human body?
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Answer: (C) Femur
The femur, or thigh bone, is the longest bone of the human body.
8. The joint between the atlas and axis is an example of:
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Answer: (C) Pivot joint
The joint between the atlas and axis is a pivot joint, allowing the head to rotate. The knee is a hinge and the shoulder a ball-and-socket joint.
9. Tetany is associated with:
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Answer: (A) Low Ca²⁺ in body fluid
Tetany consists of rapid muscle spasms caused by a low level of calcium ions in body fluid.
10. Consider the following:
- Humerus–pectoral girdle — ball-and-socket
- Knee — hinge
- Atlas–axis — pivot
- Carpals — saddle
Which are correctly matched?
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Answer: (B) 1, 2 and 3 only
Shoulder (ball-and-socket), knee (hinge) and atlas-axis (pivot) are correctly matched. The saddle joint is between the carpal and metacarpal of the thumb, not between carpals, so pair 4 is treated as wrong.
Neural control & coordination9 questions
11. A nerve fibre carrying an impulse from a sensory tissue towards the central neural system would be classified as:
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Answer: (C) Afferent fibre
Afferent fibres carry impulses from tissues and organs to the central nervous system; efferent fibres carry them back to the effectors.
12. When a stimulus makes an axonal membrane at a particular site freely permeable to Na⁺, the immediate consequence is:
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Answer: (A) Na⁺ rapidly enters and the membrane becomes depolarised
When the membrane becomes freely permeable to sodium ions, Na+ rushes in, the inside becomes positive and the membrane is depolarised, producing the action potential.
13. Which statement best distinguishes an electrical synapse from a chemical synapse?
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Answer: (C) Electrical synapses permit direct flow of electrical current between closely placed membranes.
At electrical synapses the pre- and post-synaptic membranes are very close and current flows directly across, making transmission faster than at chemical synapses.
14. The three major divisions of the human brain are:
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Answer: (B) Forebrain, midbrain and hindbrain
The human brain is divided into the forebrain (cerebrum, thalamus, hypothalamus), midbrain and hindbrain (pons, cerebellum, medulla).
15. The left and right cerebral hemispheres are connected by:
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Answer: (A) Corpus callosum
The corpus callosum is the tract of nerve fibres that connects the two cerebral hemispheres.
16. Which combination contains only structures belonging to the hindbrain?
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Answer: (B) Pons, cerebellum, medulla
The hindbrain consists of the pons, cerebellum and medulla oblongata; the thalamus and hypothalamus are parts of the forebrain.
17. From outside to inside, the three layers of the human eyeball are:
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Answer: (B) Sclera → choroid → retina
The eyeball has three layers: the outer sclera (with the transparent cornea in front), the middle choroid and the inner retina.
18. Which sequence best represents the pathway of visual information?
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Answer: (A) Light → rods/cones → bipolar cells → ganglion cells → optic nerve → brain
Light strikes the photoreceptors (rods and cones), which signal bipolar cells and then ganglion cells, whose axons form the optic nerve to the brain.
19. The inner ear is anatomically described as a fluid-filled:
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Answer: (B) Labyrinth
The inner ear, or labyrinth, is fluid-filled and has two parts, the bony labyrinth and the membranous labyrinth, containing the cochlea and vestibular apparatus.
Endocrine system6 questions
20. Endocrine glands are called ductless glands primarily because they:
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Answer: (B) Release their secretions without ducts
Endocrine glands lack ducts and release their hormones directly into the blood, unlike exocrine glands.
21. LH and FSH are collectively called gonadotrophins because they:
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Answer: (B) Stimulate gonadal activity
Luteinising hormone and follicle-stimulating hormone are called gonadotrophins because they stimulate the activity of the gonads (testes and ovaries).
22. The principal hormone secreted by the pineal gland is:
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Answer: (A) Melatonin
The pineal gland secretes melatonin, which regulates the sleep-wake cycle and other 24-hour rhythms.
23. Which response is most characteristic of adrenaline and noradrenaline during an emergency?
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Answer: (B) Increased heart rate, cardiac contraction and respiration
Adrenaline and noradrenaline, the emergency hormones, raise heart rate, the strength of heart contraction and breathing rate, and dilate the pupils.
24. Which combination is correctly associated with insulin?
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Answer: (B) β-cells — insulin — decreased blood glucose
Insulin is secreted by the beta cells of the islets of Langerhans and lowers blood glucose; glucagon from the alpha cells raises it.
25. Which of the following is correctly matched?
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Answer: (A) Cortisol — steroid
Cortisol is a steroid hormone from the adrenal cortex. Insulin is a peptide, thyroid hormones are iodinated amino-acid derivatives and epinephrine is an amine, not a steroid.
Your result
Automatic scoring needs JavaScript. Until it runs, tally by hand: score = correct − (wrong ÷ 3).
Finished, or stopping here? This counts every question you have answered so far.
Show the full answer key
1 B · 2 B · 3 B · 4 A · 5 C · 6 A · 7 C · 8 C · 9 A · 10 B · 11 C · 12 A · 13 C · 14 B · 15 A · 16 B · 17 B · 18 A · 19 B · 20 B · 21 B · 22 A · 23 B · 24 B · 25 A
Scoring: +1 correct, −1/3 wrong, 0 for (E) Not attempted, −1/3 for a row left blank in the real exam.
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