HLTH 330 Human Nutrition (LU) Midterms Qns & Ans 2025

HLTH 330

Human Nutrition

Midterms Exam Review (Qns & Ans)

2025



1. Which of the following micronutrients is crucial for the
synthesis of DNA during cell division?
a) Vitamin A
b) Vitamin C
c) Folate
d) Vitamin D
ANS: c) Folate
Rationale: Folate is vital for the synthesis of nucleotides, which
are essential for DNA replication and cell division.


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,2. Leptin primarily affects which part of the brain to regulate
appetite?
a) Medulla oblongata
b) Hypothalamus
c) Cerebellum
d) Hippocampus
ANS: b) Hypothalamus
Rationale: Leptin, a hormone produced by adipose cells,
signals the hypothalamus to regulate energy balance and suppress
appetite.


3. Which form of vitamin K is primarily involved in bone health?
a) Phylloquinone
b) Menaquinone
c) Menadione
d) Deoquinone
ANS: b) Menaquinone
Rationale: Menaquinone (Vitamin K2) is important for
activating proteins that bind calcium, which is crucial for bone
health.


4. The glycemic index of a food is determined by:
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, a) Its protein content
b) Its effect on blood glucose levels
c) Its fiber content
d) Its fat content
ANS: b) Its effect on blood glucose levels
Rationale: The glycemic index measures how quickly
carbohydrates in a food raise blood glucose levels compared to a
reference food.


5. Which of the following enzymes is responsible for the
emulsification of fats?
a) Lipase
b) Amylase
c) Pepsin
d) Bile salts
ANS: d) Bile salts
Rationale: Bile salts, produced in the liver and stored in the
gallbladder, emulsify fats in the digestive tract to increase surface
area for enzyme action.


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