2025 BECE Integrated Science Sec B Questions and Answers (Trial Test 3)

Join the Ghana Education News as we revise with these 2025 BECE Integrated Science Sec B Questions and Answers (Trial Test 3). Do well to check the other mock questions and answers shared already to help you.

Let us look at all the 2025 BECE Integrated Science Sec B Questions and Answers

Question: 

a. Distinguish between heterogeneous mixture and homogeneous mixture. (4 marks)

• Heterogeneous Mixture: A heterogeneous mixture is a mixture in which the components are not uniformly distributed, and the individual substances remain distinct. Examples include salad, sand and water, and oil and water.

• Homogeneous Mixture: A homogeneous mixture is a mixture in which the components are uniformly distributed throughout, and the mixture has a consistent composition. Examples include saltwater, air, and vinegar.
2 marks each = 4 marks

b. State whether each of the following is a homogeneous mixture or a heterogeneous mixture.
i. water and oil (1 mark)
ii. water and alcohol (1 mark)
iii. Petrol and kerosene (1 mark)

Answers

• Water and oil ———- Heterogeneous mixture 1 mark
• Water and alcohol ———- Homogeneous mixture 1 mark
• Petrol and kerosene ———— Homogeneous mixture 1 mark

Let us look at the next set of 2025 BECE Integrated Science Sec B Questions and Answers here

c.i. State three importance of feeding in humans. (3 marks)

• Feeding provides energy for daily activities and bodily functions.
• Feeding supplies nutrients necessary for growth and development.
• Feeding aids in the repair and maintenance of body tissues.
• Feeding supports a healthy immune system to fight infections.
• Feeding provides essential vitamins and minerals that regulate body processes.
1 mark each × any 3 = 3 marks

ii. Give three similarities between prokaryotic and eukaryotic cells. (3 marks)

• Both have a cell membrane that encloses the cell.
• Both contain DNA as their genetic material.
• Both have ribosomes for protein synthesis.
• Both contain cytoplasm, where cellular processes occur.
• Both perform metabolic activities necessary for life. 1 mark each × any 3 = 3 marks

d. i. Briefly describe how food is digested in the stomach. (4 marks)

In the stomach, food is mixed with gastric juices secreted by the stomach lining. These juices contain hydrochloric acid and the enzyme pepsin, which begin the digestion of proteins. The acidic environment denatures proteins, making them easier to break down. The stomach muscles contract to churn and mix the food, turning it into a semi-liquid mixture called chyme. This chyme is then gradually released into the small intestine for further digestion and absorption. 4 marks

VIDEO EPLANATION: How food is digested in the stomach

ii. Explain what happens to meat before it reaches the stomach. (3 marks)

Before meat reaches the stomach, it undergoes mechanical and chemical digestion in the mouth. The teeth chew and break down the meat into smaller pieces, increasing the surface area for enzyme action. Saliva, containing the enzyme amylase, begins the digestion of any carbohydrates present in the meat, although it doesn’t affect the proteins in the meat directly. The chewed meat is then formed into a bolus and swallowed, passing through the esophagus via peristaltic movements, and enters the stomach for further digestion.

3 marks

READ:

• 2025 BECE Integrated Science Theory Questions and Answers (Trial Test 2)
• 2025 BECE Integrated Science Practical Questions and Answers (Trial Test 1)

We hope these 2025 BECE Integrated Science Sec B Questions and Answers  have helped you understans the topics covered better.