Biomolecules Test

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Biomolecules Test - 69

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Weekly Quiz Competition

Question 1
1 / -0

Vitamin C is:

A
alcohol

B
amide

C
amine

D
lactone

Solution

Vitamin C (chemical names: ascorbic acid and ascorbate) is a six-carbon lactone which is synthesised from glucose by many animals. Vitamin C is synthesised in the liver in some mammals and in the kidney in birds and reptiles.
Question 2
1 / -0

In nucleic acids, the sequence is:

A
base-phosphate-sugar

B
base-sugar-phosphate

C
sugar-base-phosphate

D
phosphate-base-sugar

Solution

In nucleic acids , the sequence is phosphate-sugar base. Nucleic acids are polymeric macromolecules, or large biological molecules, essential for all known forms of life. Nucleic acids, which include DNA (deoxyribonucleic acid) and RNA (ribonucleic acid), are made from monomers known as nucleotides. Each nucleotide has three components: a 5-carbon sugar, a phosphate group and a nitrogenous base. If the sugar is deoxyribose, the polymer is DNA. If the sugar is ribose, the polymer is RNA.
Question 3
1 / -0

Which is not a pyrimidine base?

A
Uracil

B
Thymine

C
Cytosine

D
Guanine

Solution

In nucleic acids, three types of nucleobases are pyrimidine derivatives: cytosine (C), thymine (T), and uracil (U). Hence guanine is not a pyrimidine base.
Question 4
1 / -0

Which of the following is provitamin A?

A
Ascorbic acid

B
$$\beta -$$ Carotene

C
Calciferol

D
Ergosterol

Solution

provitamin A is a name for β-carotene, which has only about 1/6 the biological activity of retinol (vitamin A).
Question 5
1 / -0

Vitamin D is:

A
calciferol

B
ergosterol

C
tocoferol

D
pyridoxin

Solution

Ergocalciferol, also known as vitamin D₂ and calciferol, is a type of vitamin D found in food and used as a dietary supplement.
Question 6
1 / -0

A 'base-sugar-phosphate' unit in nucleic acid is called:

A
base phosphate

B
phosphotide

C
nucleotide

D
nucleoside

Solution

A 'base-sugar-phosphate' unit in nucleic acid is called a nucleotide.
Question 7
1 / -0

Vitamin D is also known as:

A
ascorbic acid

B
growth vitamin

C
reproductive vitamin

D
sunshine vitamin

Solution

Vitamin D is also known as sunshine vitamin.
Question 8
1 / -0

Which of the following is not a fat soluble vitamin?

A
Vitamin A

B
Vitamin K

C
Vitamin E

D
Niacin

Solution

Niacin(Vitamin B3) and Vitamin B are not fat-soluble vitamins.
Question 9
1 / -0

Carbohydrates are used by body mainly:

A
for obtaining vitamins

B
as a source of energy

C
for building muscles

D
for all its development needs

Solution

Carbohydrates are used by body mainly as a source of energy.
Question 10
1 / -0

Starch on hydrolysis by a dilute inorganic mineral acid gives:

A
glucose

B
fructose

C
sucrose

D
maltose

Solution

$$\text{Starch undergoes hydrolysis in the presence of mineral acids to form glucose.}$$

$$\underset{(starch)}{(C_6H_{12}O_5)_n}+nH_2O\xrightarrow[393K/2-3\ bar]{H^+}\underset{(glucose)}{nC_6H_{12}O_6}$$

Option A is correct.

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Re-Attempt Weekly Quiz Competition

Biomolecules Test - 69

Result

Biomolecules Test - 69

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SHARING IS CARING

Question 1

alcohol

amide

amine

lactone

Solution

Question 2

base-phosphate-sugar

base-sugar-phosphate

sugar-base-phosphate

phosphate-base-sugar

Solution

Question 3

Uracil

Thymine

Cytosine

Guanine

Solution

Question 4

Ascorbic acid

$$\beta -$$ Carotene

Calciferol

Ergosterol

Solution

Question 5

calciferol

ergosterol

tocoferol

pyridoxin

Solution

Question 6

base phosphate

phosphotide

nucleotide

nucleoside

Solution

Question 7

ascorbic acid

growth vitamin

reproductive vitamin

sunshine vitamin

Solution

Question 8

Vitamin A

Vitamin K

Vitamin E

Niacin

Solution

Question 9

for obtaining vitamins

as a source of energy

for building muscles

for all its development needs

Solution

Question 10

glucose

fructose

sucrose

maltose

Solution

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