Biomolecules Practice Tests

A biomolecule is any molecule that is present in living organisms, including large macromolecules such as proteins, polysaccharides, lipids, and nucleic acids, as well as small molecules such as primary metabolites, secondary metabolites, and natural products.

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Check this Part I (Part A) section Practice Papers:

In this article we prepared MCQ Quiz on Biomolecules topic from Unit I in Paper – I (Part B) and Paper II.

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Biomolecules

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This is the smart MCQ exam on "Biomolecules".

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Question 1

Depending upon the complexity and behavior on hydrolysis carbohydrates are classified into ...

A	None of these
B	4 categories
C	2 categories
D	3 categories

Question 1 Explanation:

On the basis of complexity and behavior on hydrolysis the carbohydrates are classified into three categories namely monosaccharides, oligosaccharides and polysaccarides.

Question 2

A cyclic hemi-acetal structure of sugar is formed by the combination of ..

A	Carbonyl group and hydroxyl group
B	Carbonyl group and Ketone group
C	Carbonyl group and Amine group
D	None of these

Question 2 Explanation:

The ring form of the sugar i infact a cyclic hemiacetal structure formed by the combination of the carbonyl group (i.e, aldehyde group ar C1 in aldose sugar and keto group at C2 in ketose sugar) and one of the hydroxyl groups at sugar molecule in open chain structure (usually of the highest numbered C-atom).

Question 3

Starch, Inulin and Glycogen are the examples of ...

A	monosaccarides
B	Structural Polysaccarides
C	Storage polysaccharides
D	Oligosaccharides

Question 3 Explanation:

STARCH - Plant Storage polysaccharides INULIN - Storage polysaccharides in Tubers of dahlia and artichoke GLYCOGEN - Animal storage polysaccharides

Question 4

Identify the structure of given.. Glutamic Acid

A	Glutamic acid
B	Aspartic acid
C	Cystein
D	Serine

Question 5

According to the Howarth repesentation of the sugars the -OH group at the reducing centre is present below the plane of the ring, the sugar is said to be in which of the following form?

A	alpha - form
B	beta - form
C	Both A and B
D	None of the above

Question 5 Explanation:

Howarth representation of the sugars the -OH group at the reducing centre i.e., at C1 in aldose sugar and at C2 in ketose sugars is present below the plane of the ring, the sugar is said to be in alpha-form. And if it is present above the plane of the ring, the sugar is said to have undergone beta-form.

Question 6

Puranose and Furanose derived from six and five-membered cyclic ether are respectively called -

A	Only Pyran
B	Only Furan
C	Furan and Pyran
D	Pyran and Furan

Question 6 Explanation:

Many Oligosaccahrides e.g, Glucose can exist both in straight chain and ring form. If the ring is 5-membered and 6-membered, the sugar is respectively known as Furanose and Pyranose sugar.

Question 7

Inulin is a

A	Fructosan
B	Xylan
C	Hormone
D	Glucosan

Question 8

Which group is present in the R-group of given structure Arginine

A	Phenol group
B	Guanidonium group
C	Imidazole group
D	Indole group

Question 9

What is the structure of the given biomolecule Chlorophyll b

A	Chlorophyll A
B	bacterial chlorophyll
C	Heme ring
D	Chlorophyll B

Question 10

Hydrolysis of fats by alkalies into Fatty acids and Glycerol is called

A	Saponification
B	Coagulation
C	Suspension
D	Colloidal

Question 11

Which of the following statement is not correct?

A	Fats together with waxes constitute neutral lipids
B	Fats are poorer in oxygen in comparison to carbon
C	Fats are insoluble in water
D	Fats can be hydrolyzed by alkalies into gases and amino acids

Question 11 Explanation:

Fats can be hydrolyzed by alkalies into glycerol and salts of fatty acids, which is called process of saponification.

Question 12

Column A consists different vitamins and column B consists of their chemical or other names. You have to match column A with column B and select correct option given below as correct answer. Column A a. Vitamin D b. Vitamin E c. Vitamin B6 D. Vitamin B1 Column B 1. Tocopherol 2. Thiamine 3. Pyridoxine 4. Calciferol

A	a-4, b-1, c-3, d-2
B	a-1, b-2, c-3 d-4
C	a-4, b-1, c-2, d-3
D	a-1, b-2, c-4, d-3

Question 13

Which one of the following is a sulphur containing amino acid?

A	Cysteine
B	Leucine
C	Alanine
D	Valine

Question 14

Which element is present in least amount by weight in Human body?

A	C (carbon)
B	H (hydrogen)
C	P (phosphate)
D	N (nitrogen)

Question 15

Glutathione is a

A	Tetrapeptide
B	Octapeptide
C	Tripeptide
D	dipeptide

Question 16

Sucrose is composed of...

A	Mannose and Fructose
B	Glucose and Galactose
C	Glucose and Fructose
D	Fructose and Galactose

Question 16 Explanation:

1. Sucrose is common Table sugar. 2. This is disaccharide and Reducing sugar. 3. It consist with Glucose and fructose linked by alpha 1->2 Glycosidic linkage.

Question 17

The correct configuration for given structure is... structure configuration

A	R-Configuration
B	L-Configuration
C	D-Configuration
D	S-Configuration

Question 18

Mostly all the sugars in Plants are...

A	Arabinose
B	None of these
C	L-Sugar
D	D-sugar

Question 19

Most Plant Viruses contain

A	RNA
B	Both DNA and RNA
C	None of the given
D	DNA

Question 20

Fats on hydrolysis in presence of enzyme 'Lipase' yield Glycerol and Fatty acids -

A	In 2-steps
B	In 10-steps
C	In 3-steps
D	Directly

Question 20 Explanation:

Fats are first hydrolyzed, in context of breakdown (degradation) of fats, in the presence of enzyme "Lipase" to give rise to fatty acid and glycerol. The hydrolysis takes place in 3 steps. The first two steps are reversible in which Diglyceride and Monoglyceride and produced as intermediate products. The hydrolysis is accelerated by the presence of Ca++ ions.

Question 21

Composition of Raffinose is..

A	Galactose - Galactose - Glucose - Fructose
B	Galactose - Glucose - Fructose
C	Galactose - Glucose
D	Glucose - Glucose

Question 21 Explanation:

1. Raffinose is a Trisaccharide, means have three monosaccharides. 2. It consist with Galactose - Glucose - Fructose 3. Source is Sugar cane, Beets, Seeds

Question 22

In sicle-cell anemia the abnormal Hb is