ALLCBTs

Science Questions for Junior Secondary School.

Published on Jul 25, 2025 • Education

Introduction

Hello everyone! My name is Adebanke, and in today’s lesson, we will be tackling some of the top science questions for junior secondary school students. These questions are carefully selected to help you prepare for school tests, national common entrance exams, and other junior-level science competitions.

Let’s get started with the questions and answers.

Question 1: Autotrophic and Eukaryotic Organisms

Question:
Which of the following organisms is both an autotroph and a eukaryote?

A. Bacteria
B. Amoeba
C. Algae
D. Virus

Answer: C. Algae

Explanation:
Autotrophs are organisms capable of producing their own food, usually through photosynthesis. Eukaryotes are organisms with a true nucleus in their cells. Algae meet both criteria—they make their food and have a defined nucleus.

Question 2: Absorption of Nutrients in Humans

Question:
Which part of the human digestive system is responsible for the absorption of nutrients?

A. Large intestine
B. Small intestine
C. Stomach
D. Esophagus

Answer: B. Small intestine

Explanation:
The small intestine is the primary site for nutrient absorption. After digestion in the stomach, food moves into the small intestine, where nutrients pass into the bloodstream.

(Continue in this structured format for all remaining questions: present the options, correct answer, and a brief explanation.)

Watch more educational videos and past questions: https://youtube.com/@allcbts

Conclusion

Studying these science past questions gives junior secondary students an edge in understanding fundamental concepts like nutrition, biology, and basic life sciences. Regular practice ensures confidence and accuracy in answering exam questions.

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Keywords

• Junior secondary school science questions
• Top science exam questions with answers
• Autotrophic and eukaryotic organism examples
• Digestive system past questions for JSS
• Junior science quiz preparation tips