University of Karachi7 Questions

Faculty of Science MCQs

Practice Faculty of Science multiple-choice questions for University of Karachi 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.

View Active Exams Start Custom Exam

Proton

Neutron

Electron

Positron

ExplanationElectrons are subatomic particles with a negative elementary electric charge that orbit the nucleus of an atom.

Protein synthesis

DNA replication

ATP production

Lipid storage

ExplanationMitochondria are known as the powerhouse of the cell because they generate the majority of the cell's supply of adenosine triphosphate (ATP).

Alkali metals

Halogens

Noble gases

Transition metals

ExplanationNoble gases have a complete set of valence electrons, making them chemically inert and stable.

Zeroth Law

First Law

Second Law

Third Law

ExplanationThe Second Law dictates that the total entropy of an isolated system can never decrease over time.

Hydroxyl group

Carbonyl group

Amino group

Carboxyl group

ExplanationA carbonyl group consists of a carbon atom joined to an oxygen atom by a double bond.

Carbon-12

Carbon-13

Carbon-14

Carbon-15

ExplanationCarbon-14 is a radioactive isotope used to date organic archaeological materials because it decays at a known, constant rate.

Reflection

Refraction

Diffraction

Dispersion

ExplanationDiffraction is the bending of waves around the corners of an obstacle or through an aperture into the region of geometrical shadow.

Frequently Asked Questions

Are these Faculty of Science MCQs free?

Yes. Every Faculty of Science 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 Faculty of Science MCQs help with?

They are aimed at University of Karachi and related Pakistani competitive exams that test Faculty of Science.

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.