Biomolecules Test

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Biomolecules Test - 84

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Weekly Quiz Competition

Question 1
1 / -0

Match the column.
Substrate Enzyme
(A) Ribonucleotide (i) Chitinase
(B) Chitin (ii) Cellulase
(C) Cellulose (iii) Ribonuclease

A
A-i, B-ii, C-iii

B
A-iii, B-i, C-ii

C
A-iii, B-ii, C-i

D
A-ii, B-ii, C-iii
Solution
- Ribonuclease is a type of nuclease enzyme that catalyzes the degradation of RNA into smaller components. The RNA contains Ribonucleotide which contains ribose sugar.
- Chitinases are enzymes that degrade chitin. Chitin is a fibrous substance consisting of polysaccharides, which is the major constituent in the exoskeleton of arthropods and the cell walls of fungi.
- Cellulase refers to a group of enzymes which, acting together, hydrolyze cellulose. Cellulose is a linear polysaccharide of glucose residues connected by β-1,4 linkages.
So, the correct answer is 'B'.
Question 2
1 / -0

An enzyme increases the rate of a reaction by?

A
enzymes speed up reactions by lowering activation energy.

B
Increasing the rate of random collisions of molecules

C
Removing the product of the reaction so allowing it to continue

D
Bringing the reacting molecules into precise orientation with each other
Solution
- Enzymes provide activation energy for the reactions they catalyze.
- Catalysts lower the activation energy for reactions.
- The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.so, option A is correct.
Question 3
1 / -0

What affect does Ph have on enzyme?

A
Change Shape

B
Change Charge Properties

C
Let Undergo Catalysis

D
Both A and B

Solution

As pH increases, enzyme activity increases until it reaches an optimal point in which enzymes denatures and as pH increases, enzyme activity decreases.
So the correct answer is option C.
Question 4
1 / -0

Yeast is a?

A
Bacteria

B
Antibiotic

C
Virus

D
Fungi
Question 5
1 / -0

A biological catalyst is essentially

A
A carbohydrates

B
An amino acids

C
A nitrogen molecule

D
Fats
Question 6
1 / -0

Cane sugar on hydrolysis gives:

A
glucose only

B
glucose and maltose

C
glucose and fructose

D
glucose and lactose

Solution

Cane sugar is sucrose and consists of 1 molecule of glucose and 1 molecule of fructose joined together by glycosidic linkage.
On hydrolysis (requires acidic medium), the glycosidic link breaks, and 1 molecule of glucose and 1 molecule of fructose is released.

Hence, the correct option is C
Question 7
1 / -0

Which one of the following biomolecules is insoluble in water?

A
a-Keratin

B
Haemoglobin

C
Ribonuclease

D
Adenine

Solution

$α$ $- K e r a t i n$ is completely insoluble in cold or hot water. Haemoglobin, Ribonuclease and Adenine are either soluble in cold or hot water.
Question 8
1 / -0

Which one of the following is the most abundant protein in the animals?

A
Collagen

B
Lectin

C
Insulin

D
Haemoglobin

Solution

Collagen is the most abundant protein in animal world and RuBisCO is the most abundant protein in the whole of the biosphere.
So, the correct answer is (A).
Question 9
1 / -0

A glycosidic bond occurs in which of the following biomolecules:-

A
Proteins and Carbohydrates.

B
Carbohydrates and fats.

C
Carbohydrates and DNA.

D
None of the above.

Solution

A glycosidic bond occurs between two monosaccharides of a carbohydrate polymer. Example - Cellulose, Glycogen etc
It is also one of the bonds in a DNA where it joins a sugar (Deoxyribose) molecule to a Nitrogen base with a covalent Glycosidic bond.
So, the correct answer is 'Carbohydrates and DNA.'
Question 10
1 / -0

Which of the following reaction is not an enzyme-medicated in the biological system?

A
Dissolving $$CO_2$$ in water

B
Untwining the two strands of DNA

C
Hydrolysis of sucrose

D
Formation of peptide bond

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Substrate	Enzyme
(A) Ribonucleotide	(i) Chitinase
(B) Chitin	(ii) Cellulase
(C) Cellulose	(iii) Ribonuclease

Biomolecules Test - 84

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Biomolecules Test - 84

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Question 1

A-i, B-ii, C-iii

A-iii, B-i, C-ii

A-iii, B-ii, C-i

A-ii, B-ii, C-iii

Solution

Question 2

enzymes speed up reactions by lowering activation energy.

Increasing the rate of random collisions of molecules

Removing the product of the reaction so allowing it to continue

Bringing the reacting molecules into precise orientation with each other

Solution

Question 3

Change Shape

Change Charge Properties

Let Undergo Catalysis

Both A and B

Solution

Question 4

Bacteria

Antibiotic

Virus

Fungi

Question 5

A carbohydrates

An amino acids

A nitrogen molecule

Fats

Question 6

glucose only

glucose and maltose

glucose and fructose

glucose and lactose

Solution

Question 7

a-Keratin

Haemoglobin

Ribonuclease

Adenine

Solution

α−Keratin is completely insoluble in cold or hot water. Haemoglobin, Ribonuclease and Adenine are either soluble in cold or hot water.

Question 8

Collagen

Lectin

Insulin

Haemoglobin

Solution

Question 9

Proteins and Carbohydrates.

Carbohydrates and fats.

Carbohydrates and DNA.

None of the above.

Solution

Question 10

Dissolving $$CO_2$$ in water

Untwining the two strands of DNA

Hydrolysis of sucrose

Formation of peptide bond

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$α$ $- K e r a t i n$ is completely insoluble in cold or hot water. Haemoglobin, Ribonuclease and Adenine are either soluble in cold or hot water.