Science Mcqs

19/09/2026

https://youtu.be/i5Igd_KzM1I?si=QXSn_y6jRMbHT-aO

How did human females survive and evolve through millions of years?...

15/09/2026

https://youtube.com/-l1p?si=dTPTcprDDd2ig5Zc

Welcome to Ancient World — where the past comes alive. Journey through the greatest civilizations, empires, warriors, rulers, mysteries, and legends that shaped human history. From the pyramids of Ancient Egypt and the glory of Rome and Greece to Mesopotamia, Persia, forgotten civilizations, ancie...

15/09/2026

https://youtu.be/-FPoiq02s6c?si=ipxQPU-Jo5F4M0ds

How did humans evolve from our ancient ancestors into the modern hu...

12/09/2026

https://youtu.be/3oCZOWUvw6U?si=z1M2Iz3T5n_Fftoi

For more than 160 million years, dinosaurs ruled Earth.Then, 66 m...

01/09/2026

01/09/2026

5. Which enzyme is primarily responsible for unwinding the DNA double helix at the replication fork during DNA replication?
​A) DNA Topoisomerase (Gyrase)
​B) DNA Ligase
​C) DNA Helicase
​D) Primase

01/09/2026

4. During skeletal muscle contraction, calcium ions (Ca^{2+}) bind directly to which regulatory protein to expose the active sites on actin?
​A) Tropomyosin
​B) Troponin C
​C) Myosin heavy chain
​D) Actin filament core

01/09/2026

3. The hormone responsible for increasing water reabsorption in the collecting ducts and distal convoluted tubules of nephrons is:
A) Aldosterone
B) Antidiuretic Hormone (ADH / Vasopressin)
C) Atrial Natriuretic Peptide (ANP)
D) Renin

11/02/2025

اس جیسی تصویر کے لیئے یہ انگلش استعمال کریں ۔

Imagine a friendly ghost attending a college class and writing notes, facing the chalkboard. the ghost is smiling and sitting next to a human. the image is cartoonish