Biology some questions from grade 9 unit 3 Old book.

1. Which of the following is the primary source of energy for the human body?
a) Proteins
b) Carbohydrates
c) Fats
d) Vitamins
2. Which of the following nutrients is essential for building and repairing body tissues?
a) Carbohydrates
b) Lipids
c) Proteins
d) Minerals
3. Which of the following vitamins is fat-soluble and important for vision?
a) Vitamin C
b) Vitamin B12
c) Vitamin A
d) Vitamin K
4. A deficiency in which mineral can lead to anemia?
a) Calcium
b) Sodium
c) Iron
d) Potassium
5. Which of the following is a good source of dietary fiber?
a) White bread
b) Processed meats
c) Fruits and vegetables
d) Dairy products
6. The process by which the body breaks down food into smaller molecules that can be absorbed is called:
a) Respiration
b) Circulation
c) Digestion
d) Excretion
7. Which of the following enzymes primarily breaks down carbohydrates in the mouth?
a) Pepsin
b) Lipase
c) Amylase
d) Trypsin
8. Essential amino acids are those that:
a) The body can produce in sufficient amounts.
b) Are only found in plant-based foods.
c) Must be obtained from the diet.
d) Are broken down into fatty acids.
9. Which of the following is a major function of water in the body?
a) Providing energy
b) Building strong bones
c) Transporting nutrients and waste products
d) Clotting blood
10. Which of the following is a micronutrient?
a) Glucose
b) Starch
c) Vitamin D
d) Glycogen