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Biology Concepts Challenge Worksheet

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Biology Concepts Challenge Worksheet

Biology concepts illustration

🔬 Part 1: Multiple Choice

1. Which organelle is responsible for controlling what enters and leaves the cell?

Nucleus

Cell membrane

Mitochondria

Ribosomes

2. During photosynthesis, plants convert carbon dioxide and water into:

Oxygen and glucose

Nitrogen and starch

Carbon and minerals

Hydrogen and cellulose

3. Which of the following are characteristics of living organisms? (Select all that apply)

Growth and development

Response to stimuli

Reproduction

Made of plastic materials

4. The process by which organisms break down glucose to release energy is called:

Photosynthesis

Cellular respiration

Digestion

Osmosis

✏️ Part 2: Short Answer Questions

5. Explain the difference between aerobic and anaerobic respiration. Give one example of when anaerobic respiration might occur in humans.
6. Describe how the structure of a red blood cell is specifically adapted to its function of transporting oxygen around the body.
7. Complete the word equation for photosynthesis:

_____________ + _____________ → _____________ + _____________

What role does chlorophyll play in this process?

8. Explain why enzymes are described as 'biological catalysts' and describe what happens to enzyme activity when the temperature becomes too high.

🧬 Part 3: Critical Thinking

9. A student places a piece of potato in distilled water and another piece in concentrated salt water. Predict what will happen to each piece after 30 minutes and explain your reasoning using the concept of osmosis.
10. Analyse why it would be disadvantageous for a plant to carry out photosynthesis and cellular respiration at the same rate during daylight hours.

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