Biomolecules Test

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Biomolecules Test - 57

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Weekly Quiz Competition

Question 1
1 / -0

Which of the following acid is a vitamin ?

A
aspartic acid

B
ascorbic acid

C
adipic acid

D
all of these

Solution

Vitamin C, also known as ascorbic acid and $$L$$-ascorbic acid, is a vitamin found in food and used as a dietary supplement. The disease scurvy is prevented and treated with vitamin C-containing foods or dietary supplements.
Question 2
1 / -0

Glycogen a chain polymer in which glycosidic linkage is present at C-1 and C-4 and branching occurs by formation of glycosidic linkage between C-1 and C-6. Its structure is similar to :

A
amylopectin

B
glucose

C
amylose

D
cellulose
Solution
- Glycogen and amylopectin (form of starch) polymer of $$\alpha-D-glucose$$ with glycosidic linkages.
- Glycogen is also known as animal starch because it is similar to the structure of amylopectin and is rather more highly branched.
Occurrence in human- Liver, muscle and brain.
Question 3
1 / -0

Choose the correct statement.

A
All proteins are formed from 20 amino acids

B
Both ends of a protein are similar

C
All proteins are soluble

D
Proteins are formed by glycosidic bonds
Solution
Correct Answer: A
Explanation:
All the proteins including the eukaryotic and prokaryotic proteins are made up of 20 amino acids.
In nature, there are only 20 amino acids are present which combine together differently to form all the protein.
Hence, "all proteins are formed from 20 amino acids" is the correct answer.
Question 4
1 / -0

Hydrolysis of one molecule of sucrose gives:

A
2 molecules of fructose

B
2 molecules of glucose

C
1 molecule each of glucose and fructose

D
none of these

Solution

Sucrose is oligosaccharide of glucose and fructose, after hydrolysis of sucrose the glycosidic linkage of sucrose breaks apart and gives one molecule of each glucose and fructose.
Question 5
1 / -0

Which of the following statement(s) is/are true?

A
Vitamin D is known as calciferol

B
Vitamin E is known as tocopherol

C
Vitamin K is known as phylloquinone

D
All of the above

Solution

Vitamin D is known as calciferol.
Vitamin E is known as tocopherol
Vitamin K is known as phylloquinone
Vitamin C is known as ascorbic acid.
Vitamin B is known as pyridoxine
Vitamin B$$_4$$ is known as niacin.
Vitamin B$$_2$$ is known as riboflavin.
Question 6
1 / -0

Which of the following polymer is stored in the liver of animals :

A
cellulose

B
amylose

C
glycogen

D
none of these
Solution
- Glycogen that is known as animal starch stored in the liver as well as muscles and brain.
- When the body needs glucose, enzyme break the glycogen down to glucose and fulfil the need.
Question 7
1 / -0

Amylase is an enzyme that catalyzes hydrolysis of:

A
starch to glucose

B
lactose to glucose

C
maltose to glucose

D
al of the above

Solution

Amylase is an enzyme that catalyzes the hydrolysis of starch to glucose.
Lactase is an enzyme that catalyzes the hydrolysis of lactose to glucose.
Maltase is an enzyme that catalyzes the hydrolysis of maltose to glucose.
Question 8
1 / -0

Which of the following is a water soluble vitamin?

A
$$B-$$complex

B
Vitamin $$A$$

C
Vitamin $$D$$

D
Vitamin $$E$$

Solution

$$B-$$complex (vitamins $$B$$ group) is a water-soluble vitamin. Also, vitamin $$C$$ is a water-soluble vitamin.
Vitamin $$A,\ D,\ E$$ and $$K$$ are fat soluble vitamins.
Question 9
1 / -0

Which of the following is(are) example(s) of nucleotides?

A
AMP

B
DMP

C
ATP

D
All of the above

Solution

AMP (Adenosine monophosphate), dMP (deoxyadenosine monophosphate), ATP (Adenosine triphosphate ) and UDP : (uridine diphosphate) are examples of nucleotides.
Question 10
1 / -0

The precursor for vitamin D is :

A
cholesterol

B
arachidonic acid

C
triacylglycerol

D
phospholipids

Solution

vitamin D is classified as a fat-soluble vitamin, it actually functions as a hormone in the body. The skin contains the vitamin D precursor molecule: 7-dehydrocholesterol. Under exposure to ultraviolet rays the precursor is converted into cholecalciferol. Cholecalciferol is compound with a structure similar to cholesterol.

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 57

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Biomolecules Test - 57

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SHARING IS CARING

Question 1

aspartic acid

ascorbic acid

adipic acid

all of these

Solution

Question 2

amylopectin

glucose

amylose

cellulose

Solution

Question 3

All proteins are formed from 20 amino acids

Both ends of a protein are similar

All proteins are soluble

Proteins are formed by glycosidic bonds

Solution

Question 4

2 molecules of fructose

2 molecules of glucose

1 molecule each of glucose and fructose

none of these

Solution

Question 5

Vitamin D is known as calciferol

Vitamin E is known as tocopherol

Vitamin K is known as phylloquinone

All of the above

Solution

Question 6

cellulose

amylose

glycogen

none of these

Solution

Question 7

starch to glucose

lactose to glucose

maltose to glucose

al of the above

Solution

Question 8

$$B-$$complex

Vitamin $$A$$

Vitamin $$D$$

Vitamin $$E$$

Solution

Question 9

AMP

DMP

ATP

All of the above

Solution

Question 10

cholesterol

arachidonic acid

triacylglycerol

phospholipids

Solution

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