Question

QUESTION 1

1. Which of the following is an advanced form of thiamin deficiency seen in alcoholics?

   	a.	Scurvy
   	b.	Megaloblastic anemia
   	c.	Wernicke-korsokoff syndrome.
   	d.	Pellagra

QUESTION 2

1. Which of the following is NOT TRUE about thiamin?

   	a.	A deficiency is called beriberi.
   	b.	Polyneuritis is a symptom of thiamin toxicity.
   	c.	Thiamin deficiency is common among people who subsist almost exclusively on white rice.
   	d.	Lean pork is a nutrient-dense source of naturally occurring thiamin.

QUESTION 3

1. Which of the following explains why B vitamin deficiencies lead to lack of energy?

   	a.	B vitamins are a source of kilocalories needed for energy.
   	b.	Absorption of carbohydrates and fats is decreased when B vitamins are in short supply.
   	c.	Oxygen for energy metabolism cannot be transported to the cells.
   	d.	Coenzymes needed for energy metabolism are produced in insufficient amounts.

QUESTION 4

1. A group of individuals decides to live in the wild. They buy a plot of land and grow a variety of vegetables including corn as a staple source of kilocalories. Which of the following culinary traditions that they adopt protects them from the deficiency disease pellagra?

   	a.	They grow their food without the use of pesticides which can destroy the niacin in the corn.
   	b.	They adopt a strict vegan diet, avoiding all animal products that can contaminate their body and destroy vitamins, particularly niacin.
   	c.	They make corn tortillas, a process that frees the niacin bound to a protein in the corn, making the niacin more readily available.
   	d.	They eat all their food raw to preserve the natural vitamins, particularly thiamin.

QUESTION 5

1. Pantothenic acid makes up part of ________, the gateway molecule in energy metabolism.

   	a.	acetyl CoA
   	b.	NAD
   	c.	pyruvate
   	d.	oxaloacetate

QUESTION 6

1. Megaloblastic anemia, characterized by large nucleated red blood cells, can result from a deficiency in either of the following two vitamins. Select those two vitamins.  

   	a.	pantothenic acid or riboflavin
   	b.	biotin or niacin
   	c.	folate or B12
   	d.	vitamin B6 or Folate

QUESTION 7

1. Too much folate in the diet masks the symptoms of B12 deficiency anemia. This may lead to which of the following problems?

   	a.	nerve damage
   	b.	skin rash
   	c.	diarrhea
   	d.	neural tube defects

QUESTION 8

1. Which of the following nutrients is critically important for converting amino acids to energy and for synthesizing non-essential amino acids?

   	a.	vitamin B12
   	b.	thiamin
   	c.	vitamin B6
   	d.	niacin

QUESTION 9

1. Why did sailors prior to the 1800s suffer from a disease that caused easy bruising and slow wound healing?

   	a.	They were deficient of vitamin C, which is necessary for collagen synthesis
   	b.	They were deficient in vitamin B12, which is needed for skin integrity.
   	c.	They were deficient in niacin, which is necessary skin integrity.
   	d.	They had toxic levels B6, which caused a breakdown in collogen.

QUESTION 10

1. Which of the following food substances can be converted to vitamin A in the body?

   	a.	Tryptophan
   	b.	Chlorophyll
   	c.	Xanthophyll
   	d.	Beta-carotene

Answer 1

Ans.1) Option C : Wernicke-korsokoff syndrome

Explanation : The thiamin deficiency found in alcoholics is known as Wernicke-Korsakoff Syndrome. Symptoms of this condition include paralysis or involuntary eye movement, impaired muscle coordination, memory loss and confusion.

Ans.2) Option B : Polyneuritis is a symptom of thiamin toxicity

Explanation: Thiamine is a water soluble vitamin, so there is no toxic level of thiamine in blood. It is constantly removed.

Ans.3) Option D : Coenzymes needed for energy metabolism are produced in insufficient amounts.

Explanation: Vitamin B acts as co-enzymes for various metabolism process, for example vitamin B6 (pyridoxine) is needed by cell to produce ATP. Also deficiency of other vitamin of this family leads to fatigue, confusion, etc.