WorksheetsBIOCHEMISTRY MIDTERM (VITAMINS)
Total questions: 52
Worksheet time: 42mins
is an organic compound, essential in
small amounts for the proper functioning of
the human body, that must be obtained from
dietary sources because the body cannot
synthesize it.
(a)
Vitamins differ from the major classes of
nutrients in foods in the amount required;
for vitamins, it is microgram to milligram
quantities per day compared with (a) grams per day for the major food nutrient
categories
Which of the following are water-soluble vitamins:
Vitamin A
Vitamin B6
Niacin
Riboflavin
Vitamin E
List the Following Fat-Soluble Vitamins in the following order (ADEK)
1)
2)
3)
4)
(Write your answers as:)
Albumin, Dinucleotide, Epethitamie, Keratine
(a)
It is absorbed directly into the blood?
Fat Soluble
Water Soluble
It first enters the lymph system?
Fat soluble
Water soluble
It travels without carriers
Fat soluble
Water soluble
Many require protein carriers
Fat soluble
water soluble
Water soluble vitamins are hydrophobic in nature.
True
False
Are mostly found in cells associated with Fat?
Fat soluble
Water soluble
Circulates at the water filled parts of the body?
Fat soluble
Water soluble
Kidneys remove excessive amounts through urination
Fat soluble
water soluble
Water soluble vitamins tend to remain in fat-storage sites
True
False
Which of the following is more likely to reach toxic levels when taken in as supplements?
Vitamin B6
Thiamin
Vitamin A
Vitamin B12
Which of the following is needed on frequent doses?
Vitamin A
Vitamin D
Vitamin B6
Vitamin E
Which of the following may not function as coenzymes?
Vitamin B6
Thiamin
Riboflavin
Folate
Vitamin E
Which of the following may require travelling with protein carriers?
Vitamin A
Vitamin B6
Vitamin B12
Panthothenic Acid
Vitamin D
Situation:
An Astronaut must remain unexposed to the ultraviolet rays of the sun. This deprives them of a certain vitamin required for the maintenance and strengthening of bones. The following Vitamin being mentioned is a?
Fat-soluble, Vitamin D
Water soluble, Vitamin D
Fat soluble, Vitamin A
Water Soluble, Vitamin A
The first vitamin to be synthesized in a Laboratory Setting?
Vitamin A
Vitamin B
Vitamin C
Vitamin D
Vitamin E
The reduced for of Vitamin C is known as (a) .
The oxidized for of Vitamin C is known as (a) .
What enzyme changes the L-gulonic acid into a cyclic ester? (a) .
As the L-gulonic acid becomes an cyclic ester due to Lactonase, what introduces a double bond into the ring to produce the L-ascorbic acid?
(a)
In humans, an intake of (a) of vitamin C
saturates all body tissues with the compound.
vitamin C functions as a cosubstrate in the formation of the structural protein collagen. What function is being mentioned?
(a)
Vitamin C is able to “recharge” spent enzymes that contain metal ions. What function is being mentioned?
(a)
synthesis of dopamine and norepinephrine from
the amino acid tyrosine and serotonin from the amino acid tryptophan depending on the presence of vitamin C. What function is being referred to?
(a)
Vitamin B1 is also known as (a) .
Vitamin B2 is also known as (a) .
Vitamin B3 is also known as (a) .
(State the 3 other forms according to the following order, "in, acid, amide")
Which of the following are considered as Vitamin B?
B1
B4
B12
B8
Vitamin B5 is also known as (a) .
Vitamin B6 is also known as (a) .
State the three states in the order of (ine, al, amine)
Vitamin B7 is also known as (a) .
Vitamin B9 is also known as (a) .
State the two examples in the following order, (ate, acid)
Vitamin B12 is also known as (a) .
The 1)_________________ for vitamins in the body is their
2)_______________________, to which they are converted
once they obtained from food through digestion.
Enzyme Cofactor Form
Active Form
Inactive Form
Freeform
The name thiamin comes from “thio”, which
means “ (a) ”
What is the coenzyme form of Thiamine?
(a)
The coenzyme known as (a) is needed in step 4 (decarboxylation of an α-keto acid) of the citric acid cycle and also in the conversion of pyruvate to acetyl CoA.
What is the compound structure being shown here?
Description:
the structure involves three fused six-membered
rings (two of which contain nitrogen) with the
monosaccharide ribose attached to the middle ring.
(a)
Which of the following shows the correct structure of TTP?
Flavin means (a) in latin.
Vitamin B3 first described in 1873, prepared by oxidizing nicotine using nitric acid; hence the name (a) .
Nicotinamide comes in two forms. What is the complete name of NAD?
(a)
Nicotinamide has two forms. State the complete name of NADP+?
(a)
Pantothenic acid comes from the Greek word
“ (a) ” which means “from everywhere.”
Pantothenic acid has 2 parts. What are these two parts? _____________ and __________________
(a)
Coenzyme A contains the following compounds and functional groups:
Select the following which is correct.
Acetyl Group
pantothenic acid
phosphorylate adenosine diphosphate
Methyl Group
Nicotinic Acid
Coenzyme A carries an Acetyl Group and is responsible for granting entry for the functional group into the Kreb's cycle, allowing it to start the cycle's process.
True
False
True or False:
Coenzyme A (CoA) one of the least used of all vitamin B coenzymes, contains pantothenic acid as part of it’s structure.
True
False
True or False:
CoA is required in the metabolism of carbohydrates, lipids, and proteins, where it is involved in the transfer of acetyl groups between molecules
True
False
