All Free Biology MCQs with Answers

1401. Medulla oblangata and pons are collectively called _________?

• A. Brain stem
• B. Brain base
• C. Brain root
• D. None of These

Explanation: The medulla oblongata and pons are parts of the hindbrain and together form major components of the brainstem, which connects the brain with the spinal cord and contains vital control centres. Students may choose brain base because these structures lie inferiorly, but brainstem is the anatomical term for this region.

1402. Which is important for screening the input information, before they reach the higher brain centers?

• A. Pons
• B. Cranium
• C. Reticular formation
• D. Amygdala

Explanation: The reticular formation receives and filters incoming sensory information, helping determine which signals are important enough to reach higher brain centres. The amygdala is a likely distractor because it processes emotional significance, but it is not the general sensory screening system.

1403. Which of the following allows precise muscular movements?

• A. Cerebrum
• B. Cerebellum
• C. Thalamus
• D. Hypothalamus

Explanation: The cerebellum coordinates muscle activity, balance and timing, allowing movements to be smooth and precise. Students may choose the cerebrum because it initiates voluntary movement, but it does not provide the same detailed coordination as the cerebellum.

1404. What does lalopathy mean?

• A. A disorder of speech
• B. A disorder of hearing
• C. A disorder of learning
• D. None of the above

Explanation: Lalopathy refers to a disorder affecting speech or the ability to produce speech. Students may choose a hearing disorder because hearing and speaking are related communication functions, but a hearing disorder is not the direct meaning of lalopathy.

1405. Which area of the brain does mathematical process occur?

• A. The left parietal lobe
• B. cerebrum
• C. The right parietal lobe
• D. Mid brain

Explanation: Mathematical processing, especially calculation and numerical reasoning, is strongly associated with areas of the left parietal lobe. Students may choose the cerebrum because the parietal lobe is part of it, but cerebrum is too broad for the more precise location asked here.

1406. Which part of the nervous system controls the activities of internal organs________?

• A. Spinal cord
• B. Cerebrum
• C. Cerebellum
• D. Medulla Oblongata

Explanation: The medulla oblongata contains centres that regulate involuntary activities such as breathing, heart rate, and blood pressure, thereby influencing internal organs. The cerebrum handles conscious activities and the cerebellum mainly coordinates movement and balance. Students may choose the spinal cord because it also participates in autonomic control, but among these options the medulla is the main control centre for vital involuntary functions.

1407. The part of the brain that connects the two hemispheres of the brain is called____________?

• A. Corpus callosum
• B. Medulla oblongata
• C. Cerebral cortex
• D. Cerebellum

Explanation: The corpus callosum is a broad band of nerve fibres that carries information between the left and right cerebral hemispheres. Students may choose the cerebral cortex because it covers the hemispheres, but the cortex is an outer grey-matter layer and does not connect them.

1408. Intelligence is under the control of____________?

• A. Cerebrum
• B. Cerebellum
• C. Thalamus
• D. Hypothalamus

Explanation: The cerebrum controls higher mental functions such as intelligence, memory, learning, reasoning and conscious thought through its cerebral cortex. Students may choose the cerebellum because it is also part of the brain, but its principal roles are coordination, balance and fine control of movement.

1409. Which of the following is second largest part of the brain_______________?

• A. Cerebrum
• B. Cerebellum
• C. Thalamus
• D. Hypothalamus

Explanation: The cerebellum is the second largest part of the human brain after the cerebrum and coordinates balance, posture and precise muscular activity. Students may choose the thalamus because it is a prominent brain region, but it is much smaller and mainly serves as a sensory relay centre.

1410. Which of the following is largest part of brain?

• A. Cerebrum
• B. Cerebellum
• C. Medulla oblongata
• D. Thalamus

Explanation: The cerebrum is the largest brain region and is divided into two cerebral hemispheres responsible for conscious sensation, voluntary actions and higher mental processes. Students may choose the cerebellum because it is visibly prominent, but it is only the second largest part.