MCQ Collection
MDCAT 2026 MCQs
Practice MDCAT 2026 questions with answers and explanations.
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Correct Answer: C. A cell specialized for transmitting nerve signals
Explanation:
Neurons receive, process, and transmit information.
They communicate through synapses.
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Correct Answer: C. They have filled valence shells
Explanation:
Filled valence shells are especially stable.
Noble gases therefore have little tendency to gain or lose electrons.
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Correct Answer: D. Receive signals toward the neuron cell body
Explanation:
Dendrites provide a large receptive surface.
They receive input from other cells.
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Correct Answer: D. Fluorine
Explanation:
Fluorine has very high electronegativity and a weak F-F bond.
It is the strongest elemental oxidizing halogen.
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Correct Answer: A. Receive signals toward the neuron cell body
Explanation:
Dendrites provide a large receptive surface.
They receive input from other cells.
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Correct Answer: A. Existence of an element in different structural forms
Explanation:
Allotropes differ in atomic arrangement and properties.
Diamond and graphite are carbon allotropes.
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Correct Answer: B. Receive signals toward the neuron cell body
Explanation:
Dendrites provide a large receptive surface.
They receive input from other cells.
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Correct Answer: B. Graphite
Explanation:
Graphite has delocalized electrons within its layers.
These electrons allow electrical conduction.
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Correct Answer: C. Carry nerve impulses away from the cell body
Explanation:
Axons conduct action potentials to target cells.
Some are insulated by myelin.
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Correct Answer: C. Each carbon forms a rigid three-dimensional covalent network
Explanation:
Every carbon is tetrahedrally bonded to four others.
The extended network resists deformation.
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Correct Answer: D. Carry nerve impulses away from the cell body
Explanation:
Axons conduct action potentials to target cells.
Some are insulated by myelin.
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Correct Answer: D. An oxide that reacts with both acids and bases
Explanation:
Amphoteric oxides can behave as acidic or basic substances.
Aluminum oxide and zinc oxide are examples.
