Biology Quiz 1

1. What is the basic unit of life?

Every living thing is built from one or more cells; hence, the cell is called the basic unit of life.

2. Which organelle is famously called the “powerhouse of the cell”?

Mitochondria convert the chemical energy of food into ATP, earning the nickname “powerhouse.”

3. DNA stands for…?

DNA = Deoxyribonucleic Acid, the molecule that carries genetic information.

4. What is the largest bone in the human body?

The femur, or thigh bone, is the longest and strongest bone in our body.

5. Which gas is released as a by-product during photosynthesis?

Plants split water and release oxygen while converting CO₂ into glucose.

6. Mushrooms belong to which biological kingdom?

Though they may look plant-like, mushrooms are classified in the kingdom Fungi.

7. Which blood cells are mainly responsible for fighting infections?

White blood cells (leukocytes) detect and destroy invading pathogens.

8. The functional unit of the kidney is the…?

Nephrons filter blood and form urine, maintaining homeostasis.

9. Which part of the brain controls balance and coordination?

The cerebellum fine-tunes movement and helps you stay upright and balanced.

10. Which vitamin is synthesized in human skin upon exposure to sunlight?

UV-B rays convert 7-dehydrocholesterol in skin to vitamin D₃, crucial for calcium absorption.