Which nutrient helps in building and repairing body tissues?

Here are the answers to the multiple-choice questions:

Question 27:
Which of the following careers mainly improves crop production?
The correct answer is B. Agronomist.

Question 28:
When opposite poles of magnets are brought close, they
The correct answer is B. attract.

Question 29:
The main function of the nucleus is to
The correct answer is C. control activities.

Question 30:
When electrical energy changes into sound energy in a radio, some energy is also produced as
The correct answer is C. heat.

Question 31:
Which nutrient helps in building and repairing body tissues?
The correct answer is B. Proteins.

Question 32:
If friction suddenly disappeared on Earth, it would be difficult to
The correct answer is B. walk.

Question 33:
A farmer notices stunted growth in crops despite enough water. The likely cause is
The correct answer is B. lack of nutrients.

Question 34:
When a stone is thrown upward, it eventually falls because of
The correct answer is C. gravity.

Question 35:
The relationship between science and industry is that science
The correct answer is B. provides knowledge for inventions.

Question 36:
Anaemia causes a person to feel
The correct answer is B. weak and tired.

Question 37:
A magnet loses strength when
The correct answer is B. dropped repeatedly.

Question 38:
Which example shows kinetic energy?
The correct answer is C. Moving train.

Question 39:
A child with swollen belly and thin limbs may be suffering from
The correct answer is C. kwashiorkor.

Question 40:
In real life, Newton's First Law helps us understand why
The correct answer is A. seat belts are important.