Biomolecules Test

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Biomolecules Test - 33

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Weekly Quiz Competition

Question 1
1 / -0

For artificial ripening of fruit, which of the following is used?

A
Auxin

B
Cytokinin

C
Ethylene

D
Gibberellin

Solution

All of the given options are phytohormones (plant hormones).
Plant hormones control all the growth and development activities like cell division, enlargement, flowering, seed formation, dormancy and abscission. The major function of the given hormones are as follows:
A) Auxin- Cell elongation of stems and roots
B) Cytokinin- Promotes lateral and adventitious shoot growth by inducing cell division.
C) Ethylene- Hastens the ripening of fruits
D) Gibberellin- Breaks seed dormancy promotes flowering Hence, ethylene gas is used for the artificial ripening of fruits.
Question 2
1 / -0

Which of the following vitamins is oil soluble?

A
A

B
B$$_{6}$$

C
B$$_{12}$$

D
B$$_{1}$$

Solution

Vitamins $$A$$ is oil soluble vitamin while complex of vitamin $$B$$ are water soluble vitamins.

Option A is correct.
Question 3
1 / -0

Receptors of hormones are generally:

A
carbohydrates

B
vitamins

C
lipids

D
protiens

Solution

Receptors of hormones are generally proteins.

Hormones affect distant cells by binding to specific receptor proteins in the target cell resulting in a change in cell function. When a hormone binds to the receptor, it results in the activation of a signal transduction pathway.

This may lead to cell type-specific responses that include rapid non-genomic effects or slower genomic responses where the hormones acting through their receptors activate gene transcription, resulting in increased expression of target proteins.

Option D is correct.
Question 4
1 / -0

Which of the following compound is not a vitamin?

A
niacin

B
riboflavin

C
thiamine

D
guanine

Solution

Guanine is is not a vitamin but it is a nitrogenous base. Niacin is called as vitamin $$B_3$$, riboflavin is vitamin $$B_2$$ and thiamine is vitamin $$B_1$$.
Question 5
1 / -0

The term vitamin was introduced by

A
Dr. Funk

B
Dr Edwards

C
Dr.Strepto

D
Dr Indira Hinduja

Solution

The term vitamin was introduced by Dr. Casimir Funk. He named nutritional parts of food as a "vitamine" after "vita" meaning life and "amine" from compounds found in the thiamine, he isolated from rice husks.

But later it was found that vitamin are not amines. Thus vitamin was later shortened to vitamin.

Option A is correct.
Question 6
1 / -0

Which amino acid is achiral?

A
Alanine

B
Valine

C
Proline

D
Glycine
Solution
- A chiral center of a molecule is the atom that is bonded to four different chemical species.
- Glycine is the simplest amino acid. Its sidechain (sometimes called the R-group) is one hydrogen atom. Because it has a hydrogen atom as its sidechain, glycine is the only achiral amino acid.
So, the correct answer is option D.
Question 7
1 / -0

GC / AT ratio in E. coli is

A
0.93 : 1

B
1 : 0.93

C
1 : 1.52

D
1.52 : 1

Solution

The GC : AT ratio is E.coli is 1 : 0.93.
This has been experimentally verified.
It is mainly a factual question.
Question 8
1 / -0

Glycoside linkage is an

A
Amide linkage

B
Ether linkage

C
Ester linkage

D
None of these

Solution

Glycoside linkage is a ether linkage. A glycosidic linkage is a C-O-C bond in which at least one of the carbon is a member of a carbohydrate molecule.
Question 9
1 / -0

6-amino purine is:

A
adenine

B
adenosine

C
cytidine

D
thymidine

Solution

From the structure of adenine, it is clear that it is 6-amino purine.
Question 10
1 / -0

STATEMENT-1: Lysine, cysteine and threonine are highly soluble in water but serine and valine are slightly soluble.
STATEMENT-2: Additional polar groups, such as $$-OH, -NH_{2}$$ and $$COOH$$ increase the solubility in water appreciably.
Select the correct option regarding given statements:

A
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1

B
STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1

C
STATEMENT-1 is True, STATEMENT-2 is False

D
STATEMENT-1 is False, STATEMENT-2 is True

Solution

Lysine, cysteine and threonine contains polar groups such as $$-OH, -NH_{2} and -COOH$$.
These groups increase the solubility in water appreciably.
However such groups are not present in serine and valine.
Hence, they are slightly soluble.

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Biomolecules Test - 33

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Biomolecules Test - 33

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SHARING IS CARING

Question 1

Auxin

Cytokinin

Ethylene

Gibberellin

Solution

Question 2

A

B$$_{6}$$

B$$_{12}$$

B$$_{1}$$

Solution

Question 3

carbohydrates

vitamins

lipids

protiens

Solution

Question 4

niacin

riboflavin

thiamine

guanine

Solution

Question 5

Dr. Funk

Dr Edwards

Dr.Strepto

Dr Indira Hinduja

Solution

Question 6

Alanine

Valine

Proline

Glycine

Solution

Question 7

0.93 : 1

1 : 0.93

1 : 1.52

1.52 : 1

Solution

Question 8

Amide linkage

Ether linkage

Ester linkage

None of these

Solution

Question 9

adenine

adenosine

cytidine

thymidine

Solution

Question 10

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is True; STATEMENT-2 is NOT a correct explanation for STATEMENT-1

STATEMENT-1 is True, STATEMENT-2 is False

STATEMENT-1 is False, STATEMENT-2 is True

Solution

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