Biomolecules Test

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Biomolecules Test - 69

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Weekly Quiz Competition

Question 1
1 / -0

Select the incorrect statement.

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

B
Proteins are heteropolymers made of amino acids

C
Ribozymes are nucleic acids with catalytic power

D
Nucleic acids serve as genetic material
Solution
Correct Option: A
Explanation:
Collagen is a fibrous protein. It is the most abundant protein in the whole of the biosphere. It provides structural support to the cell. These are filamentous and elongated in shape. They are generally water-soluble in shape. It has a quaternary structure. It is a multiple folded protein.
RuBisCO is the most abundant enzyme which is used to fix carbon during dark reaction of photosynthesis. It is a primary acceptor of carbon dioxide during the Calvin cycle. It is also known as Ribulose-1,5-bisphosphate carboxylase/oxygenase. It fixes the carbon dioxide to 3-phosphoglycerate. It also accepts oxygen during photorespiration and forms phosphoglycolate and 3-phosphoglycerate.
Question 2
1 / -0

Nicotine and cocaine are

A
Peptides

B
Tannins

C
Alkaloids

D
Resin

Solution

Alkaloids are naturally occurring chemical which has nitrogen as integral component. These are most diverse range of secondary metabolite. Nicotine is an alkaloid as it has nitrogen and it also forms an important constituent of tobacco. It also acts a stimulant of parasympathetic nervous system. Cocaine is an alkaloid. It has stimulant property similar to adrenaline. It blocks the transmission of pain impulses from the nerves to the brain so it is also used as pain reliever.
So, the correct answer is option C.
Question 3
1 / -0

The curve given here shows enzymatic activity with relation to three conditions (pH, temperature and substrate concentration). What do the two axes, $$X$$ and $$Y$$ represent?

A
$$X$$-axis - Substrate concentration, $$Y$$-axis - Enzyme activity

B
$$X$$-axis - Enzyme activity, $$Y$$-axis - Temperature

C
$$X$$-axis - Enzyme activity, $$Y$$-axis - pH

D
$$X$$-axis - Temperature, $$Y$$-axis - Enzyme activity

Solution

Enzymes are made up of proteins which accelerates the rate of the reaction. It lowers the activation energy and converts the reactants into the substrate. The increased temperature increases the kinetic energy of the enzymes which further accelerates the activity of the enzyme but at the temperature higher than the optimum temperature the enzyme gets denatured as the peptide bonds between the proteins molecules breaks which disrupts the structure of enzymes.
So, the correct answer is option D.

Question 4

1 / -0

Match and find the correct option.

$$(a)$$	Oxidoreductases	$$(i)$$	Linking of the compounds
$$(b)$$	Isomerases	$$(ii)$$	Removal of group from substrate
$$(c)$$	Ligases	$$(iii)$$	Interconversion of isomers
$$(d)$$	Lyases	$$(iv)$$	Dehydrogenases
		$$(v)$$	Hydrolysis

$$a - iv, b - i, c - iii, d - ii$$

$$a - iv, b - iii, c - i, d - ii$$

$$a - iii, b - iv, c - ii, d - v$$

$$a - ii, b - v, c - iii, d - i$$

Solution

Oxidoreductase is a dehydrogenase which acts as an acceptor of hydrogen or electrons.

Isomerases are class of enzymes that convert a molecule from one isomer to another isomer.

Ligase is an enzyme that can catalyze the joining of two large molecules by forming a new chemical bond between them.

An enzyme that forms double bonds by removing groups from a substrate other than by hydrolysis, is called lyases.

So the correct answer is B.

Question 5
1 / -0

Polysaccharide monomers are linked by

A
Peptide bonds

B
Glycosidic bonds

C
Hydrogen bonds

D
Phosphodiester bonds

Solution

Polysaccharides are monosaccharide linked by glycosidic bonds.
Starch is a polysaccharide formed by a-1,4 linkages between two glucose unit which is broken down during its digestion. It exists in two forms known as amylose and amylopectin. Amylose is a linear poly-D-glucose in which the monosaccharides are connected by alpha 1, 4 glycosidic linkages. Amylopectin has alpha 1, 4-glycosidic linkages with side chain branching of alpha 1,6 linkage.
So, the correct answer is option B.
Question 6
1 / -0

Choose the correct combination.
$$1.$$ Carbohydrates $$a$$ Trypsin
$$2.$$ Protein $$b$$ Cholesterol
$$3.$$ Nucleic acid $$c$$ Inulin
$$4.$$ Lipid $$d$$ Adenylic acid

A
$$1 - c, 2 - a, 3 - d, 4 - b$$

B
$$1 - b, 2 - c, 3 - d, 4 - a$$

C
$$1 - c, 2 - d, 3 - a, 4 - b$$

D
$$1 - d, 2 - a, 3 - b, 4 - c$$

E
$$1 - a, 2 - b, 3 - c, 4 - d$$

Solution

Inulin is a carbohydrate which is considered as homoploymer of fructose. It is typically formed in roots and rhizomes.
Trypsinogen is activated by enteropeptidase to trypsin which helps in the digestion of protein in the small intestine. It is a enzyme which is protein in nature.
Adenylic acid is formed by combination of adenine as a nitrogenous base, ribose sugar and triphosphate. The nitrogenous base attaches at first carbon of sugar.
Lipid consist of three fatty acids bound to a molecule of glycerol. Cholesterol is a type of lipid present in the blood.
So, the correct answer is option A.
Question 7
1 / -0

Enzyme catalysis is an example of:

A
autocatalysis

B
heterogeneous catalysis

C
homogeneous catalysis

D
induced catalysis

Solution

When the biomolecules and enzymes are in the same state, the enzymes are said to be homogeneous catalysts, whereas when they are in a different state, then the enzyme is said to be a heterogeneous catalyst.
Enzymes are homogeneous catalysts since they have to be in the same state as that of the reactants in order to mix well and speed up the decomposition of the biomolecule.
Question 8
1 / -0

Pick out wrong statement.

A
Proteins are linear chains of amino acids linked by peptide bonds

B
Cellulose is a homopolymer

C
Inulin is polymer of glucose

D
RuBisCO is the most abundant protein in the whole biosphere

E
Chitin is a homopolymer

Solution

Answer is option C i.e. "Inulin is polymer of glucose"
Inulin is a heterogeneous blend of fructose polymers found widely distributed in nature as plant storage carbohydrates. Inulin is a heterogeneous collection of fructose polymers. It consists of chain-terminating glucosyl moieties and a repetitive fructosyl moiety, which are linked by β(2,1) bonds.
Question 9
1 / -0

Which of the following rules states that with increase of every $${10}^{o}C$$ temperature, the rate of metabolic process gets doubled?

A
Van't Hoff's rule

B
Bergman's rule

C
Allen's rule

D
Jordan's rule

Solution

Van't Hoff's rule stated that rate of the metabolic reaction increases with rising of temperature. At every 10$$^o$$C rise in the temperature, the rate of metabolic reaction doubles. The relationship between temperature and metabolic rate is often measured as Q$$_{10}$$.
At high temperature, enzymes get activated. The increased temperature increases the kinetic energy of the enzymes which further accelerates the activity of the enzyme but at the higher temperature, it gets denatured as the peptide bonds between the proteins molecules breaks which disrupts the structure of enzymes.
So, the correct answer is option A.
Question 10
1 / -0

Which is a carbohydrate having repeated $$\beta$$-glucose units?

A
Pectin

B
Lignin

C
Starch

D
Cellulose

Solution

Cellulose is a polysaccharide. It is formed by the linkage of beta 1,4 linkage of glucose unit. It is an important component of cell wall of the plant. It is used for production of paper.
Pectin is mostly present in the cell wall of the plant and the concentrated in the skin of fruits. It consists of esterified D-galacturonic acid resides in an alpha-(1-4) chain.
Starch is formed by a-1,4 linkages between two glucose unit which is broken down during its digestion.
Lignin is present in the cell wall which provides strength to the plant. It is a complex polymer of aromatic alcohol.
So, the correct answer is option D.

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$$1.$$	Carbohydrates	$$a$$	Trypsin
$$2.$$	Protein	$$b$$	Cholesterol
$$3.$$	Nucleic acid	$$c$$	Inulin
$$4.$$	Lipid	$$d$$	Adenylic acid

Biomolecules Test - 69

Result

Biomolecules Test - 69

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Question 1

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

Proteins are heteropolymers made of amino acids

Ribozymes are nucleic acids with catalytic power

Nucleic acids serve as genetic material

Solution

Question 2

Peptides

Tannins

Alkaloids

Resin

Solution

Question 3

$$X$$-axis - Substrate concentration, $$Y$$-axis - Enzyme activity

$$X$$-axis - Enzyme activity, $$Y$$-axis - Temperature

$$X$$-axis - Enzyme activity, $$Y$$-axis - pH

$$X$$-axis - Temperature, $$Y$$-axis - Enzyme activity

Solution

Question 4

$$a - iv, b - i, c - iii, d - ii$$

$$a - iv, b - iii, c - i, d - ii$$

$$a - iii, b - iv, c - ii, d - v$$

$$a - ii, b - v, c - iii, d - i$$

Solution

Question 5

Peptide bonds

Glycosidic bonds

Hydrogen bonds

Phosphodiester bonds

Solution

Question 6

$$1 - c, 2 - a, 3 - d, 4 - b$$

$$1 - b, 2 - c, 3 - d, 4 - a$$

$$1 - c, 2 - d, 3 - a, 4 - b$$

$$1 - d, 2 - a, 3 - b, 4 - c$$

$$1 - a, 2 - b, 3 - c, 4 - d$$

Solution

Question 7

autocatalysis

heterogeneous catalysis

homogeneous catalysis

induced catalysis

Solution

Question 8

Proteins are linear chains of amino acids linked by peptide bonds

Cellulose is a homopolymer

Inulin is polymer of glucose

RuBisCO is the most abundant protein in the whole biosphere

Chitin is a homopolymer

Solution

Question 9

Van't Hoff's rule

Bergman's rule

Allen's rule

Jordan's rule

Solution

Question 10

Pectin

Lignin

Starch

Cellulose

Solution

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