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Biology MCQs

Practice Biology multiple-choice questions for Riphah International University competitive exams. Each question includes the correct answer and a short explanation, and past-paper questions are marked so you can revise both repeated and fresh material in one place.

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Nucleus

Mitochondria

Ribosome

Golgi apparatus

ErklärungMitochondria are responsible for generating most of the cell's supply of adenosine triphosphate (ATP), which is used as a source of chemical energy.

Glucose

Lactose

Fructose

Sucrose

ErklärungPhotosynthesis converts light energy into chemical energy, primarily in the form of glucose.

A+

B-

AB+

O-

ErklärungType O- blood cells lack A, B, and Rh antigens, meaning they can be donated to individuals of any blood type.

Cerebrum

Cerebellum

Medulla

Thalamus

ErklärungThe cerebellum is the region of the brain responsible for maintaining posture, balance, and motor coordination.

Tissue

Organ

Cell

Molecule

ErklärungThe cell is universally accepted as the fundamental structural and functional unit of all living organisms.

Cytosine

Guanine

Thymine

Uracil

ErklärungAccording to base-pairing rules in DNA, Adenine (A) bonds with Thymine (T) via two hydrogen bonds.

Vitamin A

Vitamin C

Vitamin D

Vitamin K

ErklärungUltraviolet B rays from sunlight trigger the synthesis of Vitamin D in the skin.

Respiration

Transpiration

Photosynthesis

Fermentation

ErklärungPhotosynthesis is the process used by plants to convert light energy into chemical energy stored in glucose.

Adenine

Guanine

Cytosine

Uracil

ErklärungUracil replaces thymine in RNA molecules.

Fight infection

Clot blood

Transport oxygen

Produce hormones

ErklärungRed blood cells contain hemoglobin, which binds to oxygen to transport it throughout the body.

Frequently Asked Questions

Are these Biology MCQs free?

Yes. Every Biology MCQ on this page is free to practice, including the correct answer and explanation.

Do these include past-paper questions?

Yes — questions sourced from past papers are clearly marked with a "Past Paper" badge, alongside fresh practice questions.

Which exams do these Biology MCQs help with?

They are aimed at Riphah International University and related Pakistani competitive exams that test Biology.

How should I practice subject-wise MCQs?

Attempt each question first, then reveal the answer and read the explanation. Short, focused sessions on one subject work better than long unstructured reading.