NTP Macronutrient & Micronutrient Science 2

Question 1

Which fatty acid is classified as an omega-6 and is considered essential because humans cannot synthesize it?

Accepted Answer

Linoleic acid

Answer

Linoleic acid (18:2 n-6) is the essential omega-6 fatty acid that must be obtained from the diet.

Question 2

What is the primary role of chromium as a micronutrient in human metabolism?

Accepted Answer

Potentiating insulin signaling and glucose uptake

Answer

Chromium enhances insulin receptor sensitivity, facilitating glucose uptake into cells.

Question 3

In the context of protein quality, what does a PDCAAS score of 1.0 indicate?

Accepted Answer

The protein meets or exceeds all essential amino acid requirements after digestibility correction

Answer

A PDCAAS of 1.0 (the maximum score) means the protein fully meets human essential amino acid needs when digestibility is accounted for.

Question 4

Which vitamin is unique in that it can be synthesized by humans through skin exposure to ultraviolet B radiation?

Accepted Answer

Vitamin D

Answer

Vitamin D3 (cholecalciferol) is synthesized in the skin when 7-dehydrocholesterol is converted upon UVB exposure.

Question 5

What metabolic fate do excess dietary carbohydrates primarily take when glycogen stores are full?

Accepted Answer

Conversion to fatty acids via de novo lipogenesis

Answer

When glycogen stores are saturated, excess carbohydrates undergo de novo lipogenesis primarily in the liver, forming fatty acids.

(NTP) Nutritional Therapy Practitioner Practice Test