Skip to content

Free MCQs for FPSC, NTS, PPSC, PMS, CSS & All Pakistan Exams 2026

Menu

Login Now

Menu

Home
GK Mcqs
Current Affairs
Pak Study
More
Computer Science
Articles
Forum

Lock-key theory about action of enzyme is proposed by:

Leave a Comment / Biology Mcqs

A. Fischer
B. Koshland
C. Stanely
D. Kuhn

← Previous Post

Related Posts

Glaucoma is disease of

Leave a Comment / Biology Mcqs, Everyday Science, GK Mcqs / By Ahsan Ramay

Circulation of blood is discovered by

Leave a Comment / Biology Mcqs, Everyday Science, GK Mcqs / By Ahsan Ramay

Frederick Gowland Hopkins discovered

Leave a Comment / Biology Mcqs, Everyday Science, GK Mcqs / By Ahsan Ramay

Leave a Comment Cancel Reply

Your email address will not be published. Required fields are marked *

Type here..

Name*

Email*

Website

Save my name, email, and website in this browser for the next time I comment.

Δ

Search

Recent Posts

Which organization released the global guidelines on child and adolescent obesity reported on 7 October 2026? October 12, 2026
Who was announced as the winner of the 2026 Nobel Peace Prize? October 12, 2026
What is the main purpose of the climate mitigation package the European Union plans to promote at COP31? October 12, 2026
Which United Nations-related agency reported the migrant boat tragedy between Djibouti and Yemen? October 12, 2026
Which city is hosting the 2026 IMF and World Bank Annual Meetings? October 12, 2026

Categories

Forums

Examtonight Forum

MDCAT Pakistan 2026 — Registration, Verification & Medical Exam Preparation

Punjab Education department

Punjab Services and General Administration

Punjab Police Department

About Us

ExamTonight is a free online learning platform for students preparing for competitive exams in Pakistan. We help students learn faster with free MCQs, mock tests, quizzes, past papers, study notes, and the latest current affairs.

Quick Links

About Us
Contact Us
Privacy Policy
Forum
Submit MCQ’s

Terms

Terms of Use
Privacy Policy
Cookies Policy
Our Team
FAQ's
Site Map

Popular Categories

Biology Mcqs
Chemistry Mcqs
Computer Mcqs
Tech Current Affairs
Pakistan Current Affairs
World Current Affairs
English Mcqs

Contact

info@examtonight.com

Facebook Twitter Youtube Instagram Linkedin

Developed by DevMaxim

© Copyright 2026 examtonight. All right reserved.

Insert/edit link

Enter the destination URL

URL

Link Text

Open link in a new tab

Or link to existing content

Search

No search term specified. Showing recent items. Search or use up and down arrow keys to select an item.