Biomolecules Test

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Biomolecules Test - 78

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Weekly Quiz Competition

Question 1
1 / -0

The correct order of chemical composition of living tissues/cells in term of percentage of the total cellular mass is

A
nucleic acids > proteins > $$H_20$$ > carbohydrates > Ions> lipids

B
$$H_20$$ > proteins > nucleic acids > carbohydrates> lipids > ions

C
$$H_20$$ > proteins > carbohydrates > nucleic acids> Lipids > ions

D
lipids > ions > carbohydrates > $$H_20$$ > proteins > nucleic acids

Solution

The average composition of a living cell is water $$70-90\%$$; proteins $$10-15\%$$; Nucleic acids $$5-7\%$$;carbohydrates$$3\%$$;lipids $$2\%$$ions $$1\%$$.
So, the correct answer is 'H20 > proteins > nucleic acids > carbohydrates> lipids > ions'.
Question 2
1 / -0

Which of the following are isomers?

A
3PGA and 2PGA

B
PGAL and DHAP

C
Glucose and Fructose

D
All of these

Solution

Isomers are molecules that have the same molecular formula but have a different arrangement of the atoms in space. That excludes any different arrangements which are simply due to the molecule rotating as a whole or rotating about particular bonds. For example, in respiration, 3PGA and 2PGA, PGAL and DHAP, Glucose and Fructose.
Thus, the correct answers is 'All of these.'
Question 3
1 / -0

When we homogenise any tissue in trichloroacetic acid, the acid soluble pool may contain

A
Proteins

B
Nucleic acids

C
Amino acids

D
Polysaccharides

Solution
Question 4
1 / -0

Macro-biomolecules have molecular size ___________.

A
less than 100 daltons

B
more than 10000 daltons

C
less than 10000 daltons

D
more than 1000 daltons

Solution

Macro-biomolecules have high molecular weight. They are insoluble in water.
Their molecular weights are more than 1000 daltons.
Question 5
1 / -0

Chemical weapons have been developed which are poisons that interfere with the enzyme cholinesterase of the human nerves, glands, muscles, and heart-beat leading to fatal consequences. Which of the following is a deadly nerve/ gas developed during the Second World War?

A
Sarin

B
Nitric oxide

C
Phosgene

D
Argon

Solution

Sarin was a deadly gas developed accidentally during the Second World War by the Nazis
Question 6
1 / -0

Which of the following statement is incorrect?

A
Average temperature decreases progressively form plains to the mountain tops

B
Average temperature decreases progressively form the equator towards the poles

C
Temperature affects the kinetic of enzymes and through it the basal metabolism of organism

D
None of these
Solution
Correct Option: D
Explanation:
The average temperature drops gradually from the plains to the mountain peaks.
The average temperature falls steadily from the equator to the poles.
Temperature influences the kinetics of enzymes and, as a result, the organism's basal metabolism.
As a result, all statements are correct.
Hence, the incorrect statement is none of these.
Question 7
1 / -0

Select the incorrect statement.

A
Ribozymes are nucleic acids with catalytic power.

B
Nucleic acids serve as genetic material.

C
Proteins, nucleic acids and polysaccharides are the only three types of macromolecules found in the living system.

D
Collagen is the most abundant protein in the whole of the biosphere and RuBisCo is the most abundant protein in animal world.
Solution
Correct Answer: D
Explanation:
Collagen is a fibrous protein. It has a triple helix structure which is characterised by high tensile strength.
Collagen is found in connective tissue such as tendons, cartilage, organic matrix of bones and the cornea of an eye. RUBISCO is an acronym for Ribulose-1,5-bisphosphate carboxylase oxygenase.
It is the first enzyme in Calvin cycle which catalyzes the carboxylation reaction in Calvin cycle.
Collagen is the most abundant protein (structural protein) in the animal world while Ribulose Bisphosphate Carboxylase Oxygenase (RUBISCO) is the most abundant protein in the whole of the plant world.
Question 8
1 / -0

Which of the following statements is/are incorrect?

A
A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a 5-carbon sugar

B
A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a ribose sugar

C
A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a deoxyribose sugar

D
None of the above
Solution
- Nucleic acid is a component molecule made up of a nitrogenous base, a phosphate group and a 5-carbon sugar.
- If 5-carbon sugar is ribose then the nucleic acid is said to be Ribo nucleic acid or RNA.
- If 5-carbon sugar is 2-deoxy ribose then the nucleic acid is said to be Deoxy ribo nucleic acid or DNA.
- So, the correct answer is ' None of the above'.
Question 9
1 / -0

_________ contains phospho-diester linkage.

A
Carbohydrate

B
Proteins

C
Nucleic acid

D
Lipids

Solution

Nucleic acid contains phospho-diester linkage.
Carbohydrates contain glycosidic linkage and proteins contain peptide linkage.
Question 10
1 / -0

Which of the following bond in DNA links a 3' pentose sugar to a 5' pentose sugar?

A
Hydroxyl bond

B
Phosphodiester bond

C
Glycosidic bond

D
None of the above

Solution

Bond linking 3' pentose sugar to a 5' pentose sugar is the phosphodiester bond because the usually sugars form ester bonds. Here the formed ester bonds have a phosphate molecule in between them, so it called phosphodiester bond.
So, the correct option is 'Phosphodiester bond'.

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Biomolecules Test - 78

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Biomolecules Test - 78

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Question 1

nucleic acids > proteins > $$H_20$$ > carbohydrates > Ions> lipids

$$H_20$$ > proteins > nucleic acids > carbohydrates> lipids > ions

$$H_20$$ > proteins > carbohydrates > nucleic acids> Lipids > ions

lipids > ions > carbohydrates > $$H_20$$ > proteins > nucleic acids

Solution

Question 2

3PGA and 2PGA

PGAL and DHAP

Glucose and Fructose

All of these

Solution

Question 3

Proteins

Nucleic acids

Amino acids

Polysaccharides

Solution

Question 4

less than 100 daltons

more than 10000 daltons

less than 10000 daltons

more than 1000 daltons

Solution

Question 5

Sarin

Nitric oxide

Phosgene

Argon

Solution

Question 6

Average temperature decreases progressively form plains to the mountain tops

Average temperature decreases progressively form the equator towards the poles

Temperature affects the kinetic of enzymes and through it the basal metabolism of organism

None of these

Solution

Question 7

Ribozymes are nucleic acids with catalytic power.

Nucleic acids serve as genetic material.

Proteins, nucleic acids and polysaccharides are the only three types of macromolecules found in the living system.

Collagen is the most abundant protein in the whole of the biosphere and RuBisCo is the most abundant protein in animal world.

Solution

Question 8

A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a 5-carbon sugar

A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a ribose sugar

A nucleic acid is a molecule made up of a nitrogenous base, a phosphate group and a deoxyribose sugar

None of the above

Solution

Question 9

Carbohydrate

Proteins

Nucleic acid

Lipids

Solution

Question 10

Hydroxyl bond

Phosphodiester bond

Glycosidic bond

None of the above

Solution

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