Biomolecules Test

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Biomolecules Test - 63

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Weekly Quiz Competition

Question 1
1 / -0

A protein molecule is formed of

A
Chain of amino acids

B
Chain of fatty acids

C
Chain of monosaccharides

D
Chain of oligosaccharides

Solution

Protein is a polymer of amino acids, it is made of several amino acids which are linked together by the peptide bond. Different proteins differ in their composition and contain a different sequence of amino acids in their structure Thus, the correct answer is A.
Question 2
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Which one is a conjugate enzyme?

A
Succinate dehydrogenase

B
Urease

C
Trypsin

D
Both A and B

Solution

Conjugated proteins are those which has a conjugated group or prosthetic group attached to it. Nucleoprotein has nucleic acid attached as prosthetic group. Succinate dehydrogenase is an enzyme which is present in the inner mitochondrial membrane. It catalyzes the oxidation of succinate to fumarate. It is a conjugated protein as it has flavoprotein which has FMN or FAD molecule as a prosthetic group.
So, the correct answer is option A.
Question 3
1 / -0

Mucin present in saliva is a

A
Mucoprotein

B
Mucopolysaccharide

C
Derived protein

D
Small polysaccharide

Solution

Mucin is a mucoprotein found in mucous. It coats the epithelial surface. Gastric mucin protects the stomach from an attack of acids. it is mainly produced by goblet cells, apical cells of the conjunctiva and cornea and the lacrimal gland. It is present in saliva and bile and in salivary glands, in the skin, connective, tissues, tendon, and cartilage. It is formed from mucigen and in water, it forms a slimy solution.
So, the correct answer is option A.
Question 4
1 / -0

Protein is a

A
Macromolecule

B
Steroid

C
Fat

D
Micromolecule
Solution
A.Correct option A

B.Explanation for correct option:
- Proteins are building blocks of the body.
- The proteins are made up of amino acids. The amino acids are linked together by peptide bonds to form a protein.
- A peptide bond is formed by the linkage of the carboxyl group of one amino acid with the amino group of the amino acids.
- It is known as a macromolecule as it is made up of a large number of molecules.
Question 5
1 / -0

A high fever is dangerous to human body because it

A
Denatures enzymes

B
Inactivates enzymes

C
Coagulates blood

D
Boils fluids inside body

Solution

Enzymes play very important role in living organisms. All the biological activity is catalyzed by enzymes. Enzymes are heat and ph sensitive it cannot work at very high temperature or very low temperature. If the temperature of a body raises due to high fever, enzymes denature and not function properly which is dangerous to living body. Thus, the correct answer is A.
Question 6
1 / -0

An enzyme accelerates a biochemical reaction by

A
Increasing substrate movements

B
Changing free enzyme

C
Production of heat

D
Lowering energy of activation

Solution

Enzymes are proteins which accelerate the rate of the reaction. The substrate and product have different energy state. The energy gap between the substrate and the product is known as activation energy which is the minimum energy required to initiate a reaction. The enzymes lower the activation energy and lead to the faster conversion of substrate to the product.
So, the correct answer is option D.
Question 7
1 / -0

Enzymes functional in cells are called

A
Endoenzymes

B
Exoenzymes

C
Apoenzymes

D
Isoenzymes

Solution

Endoenzyme is the cells which function inside the cell. It is also known as intracellular enzymes. It helps in the catalysis of the intracellular metabolic reaction.
Exoenzymes are the enzymes which function outside the cell.
Isoenzyme is also known as isozyme. When the two enzymes differ in amino acid sequence but catalyze the same chemical reaction they are known as isoenzyme. They are two different molecular form of the enzyme.
Enzymes are proteins which help to catalyze the biochemical reaction. The enzyme has a protein part which is not active is known as apoenzyme.
So, the correct answer is option A.
Question 8
1 / -0

The activity of succinate dehydrogenase is inhibited by

A
Malonate

B
Pyruvate

C
Glycolate

D
Phosphoglycerate
Solution
A molecule similar to substrate competes with the substrate for the active site. Such molecules are known as the inhibitor.
The presence of the inhibitor decreases the availability of the active site for the substrate and further decreases the rate of reaction. This inhibition is known as competitive inhibition.
Succinate dehydrogenase is an enzyme that is present in the inner mitochondrial membrane. It catalyzes the oxidation of succinate to fumarate.
It is a conjugated protein as it has flavoprotein which has FMN or FAD molecule as a prosthetic group.
Malonate acts as an inhibitor that competes with the succinate and prevents its attachment to the enzyme.
So, the correct answer is option A.
Question 9
1 / -0

Principal organic constituent of a living being in order of relative abundance is

A
Water

B
Protein

C
Lipid

D
DNA

Solution

Water present in the human body supports the metabolic reactions in the body. The enzymes which act as a catalyst in these biological reaction acts efficiently in presence of water. The salts like sodium and potassium which dissolves in the water act as a transporter.
Proteins are building blocks of the body. The proteins are made up of amino acids. Being the building block of the body proteins are found in abundance in the human body. Along with lipids it forms cell membrane and covering of the organelles in a eukaryotic and prokaryotic cell. Some of the proteins are enzymes which catalyze the biochemical reaction.
Lipids form an important component of the cell wall. It is produced by smooth endoplasmic reticulum.
DNA is genetic material present in the nucleus which is required for inheritance of character.
So, the correct answer is option B.
Question 10
1 / -0

The four elements making $$99$$% of living system are:

A
$$CHOS$$

B
$$CHOP$$

C
$$CHON$$

D
$$CNOP$$

Solution

Oxygen is the most abundant element for the living organism. It is used for respiration. The oxygen inhaled supports the oxidation of food and releases energy. It plays an important role in the oxidative phosphorylation occurring in the mitochondria. The process produces energy in form of ATP.
Nitrogen is an important component of the amino acids which is a monomer of protein.
Carbon and Hydrogen are important constituent of various biomolecules.
So, the correct answer is option C.

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Biomolecules Test - 63

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Biomolecules Test - 63

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SHARING IS CARING

Question 1

Chain of amino acids

Chain of fatty acids

Chain of monosaccharides

Chain of oligosaccharides

Solution

Question 2

Succinate dehydrogenase

Urease

Trypsin

Both A and B

Solution

Question 3

Mucoprotein

Mucopolysaccharide

Derived protein

Small polysaccharide

Solution

Question 4

Macromolecule

Steroid

Fat

Micromolecule

Solution

Question 5

Denatures enzymes

Inactivates enzymes

Coagulates blood

Boils fluids inside body

Solution

Question 6

Increasing substrate movements

Changing free enzyme

Production of heat

Lowering energy of activation

Solution

Question 7

Endoenzymes

Exoenzymes

Apoenzymes

Isoenzymes

Solution

Question 8

Malonate

Pyruvate

Glycolate

Phosphoglycerate

Solution

Question 9

Water

Protein

Lipid

DNA

Solution

Question 10

$$CHOS$$

$$CHOP$$

$$CHON$$

$$CNOP$$

Solution

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