Question 1: What is the basic unit of life? A) Molecule B) Cell C) Tissue D) Organ

Explanation: The correct answer is B) Cell. Cells are the fundamental units of life and are the building blocks of all living organisms.

Question 2: Which organ is responsible for pumping blood throughout the body? A) Liver B) Lungs C) Heart D) Kidney

Explanation: The correct answer is C) Heart. The heart is a muscular organ that pumps blood throughout the circulatory system, providing oxygen and nutrients to the body’s cells.

Question 3: What process allows plants to convert light energy into chemical energy stored in glucose? A) Respiration B) Photosynthesis C) Fermentation D) Digestion

Explanation: The correct answer is B) Photosynthesis. Photosynthesis is the process by which plants use light energy, carbon dioxide, and water to produce glucose and oxygen.

Question 4: Which molecule stores genetic information in cells? A) Protein B) Lipid C) Carbohydrate D) DNA

Explanation: The correct answer is D) DNA. DNA (deoxyribonucleic acid) is a molecule that carries genetic information and is responsible for heredity and the functioning of cells.

Question 5: Which body system is responsible for protecting the body against pathogens and foreign substances? A) Digestive System B) Circulatory System C) Immune System D) Nervous System

Explanation: The correct answer is C) Immune System. The immune system plays a crucial role in protecting the body from infections and diseases caused by pathogens.

Question 6: What is the process by which living organisms produce offspring similar to themselves? A) Evolution B) Reproduction C) Respiration D) Homeostasis

Explanation: The correct answer is B) Reproduction. Reproduction is the biological process by which organisms produce offspring with genetic traits similar to their parents.

Question 7: Which molecule is responsible for carrying oxygen in red blood cells? A) Hemoglobin B) Insulin C) Glucose D) Cholesterol

Explanation: The correct answer is A) Hemoglobin. Hemoglobin is a protein molecule found in red blood cells that binds to and carries oxygen from the lungs to the body’s tissues.

Question 8: Which system is responsible for producing hormones that regulate various bodily functions? A) Respiratory System B) Muscular System C) Endocrine System D) Skeletal System

Explanation: The correct answer is C) Endocrine System. The endocrine system produces hormones that help regulate growth, metabolism, reproduction, and other bodily functions.

Question 9: Which scientist is known for developing the theory of evolution through natural selection? A) Isaac Newton B) Charles Darwin C) Albert Einstein D) Gregor Mendel

Explanation: The correct answer is B) Charles Darwin. Charles Darwin is famous for developing the theory of evolution through natural selection, which revolutionized our understanding of how species change over time.

Question 10: Which part of a cell is responsible for generating energy through cellular respiration? A) Nucleus B) Mitochondria C) Golgi Apparatus D) Endoplasmic Reticulum

Explanation: The correct answer is B) Mitochondria. Mitochondria are the “powerhouses” of the cell, where energy production through cellular respiration takes place.