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

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

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

Question 2

In sicle-cell anemia the abnormal Hb is

A	HbF
B	HbM
C	HbS
D	HbA2

Question 3

Fats can be stored in the cell without disturbing their...

A	None of the above
B	Aleurone layer
C	Osmotic relations
D	Hydroxyl bond

Question 4

Glutathione is a

A	Tetrapeptide
B	Octapeptide
C	dipeptide
D	Tripeptide

Question 5

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

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

Question 6

Inulin is a

A	Glucosan
B	Fructosan
C	Xylan
D	Hormone

Question 7

Which of the following statement is not correct?

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

Question 7 Explanation:

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

Question 8

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

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

Question 8 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 9

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

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

Question 9 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 10

Sucrose is composed of...

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

Question 10 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 11

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

Question 12

Mostly all the sugars in Plants are...

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

Question 13

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

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

Question 14

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

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

Question 14 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 15

Identify the structure.. Cholesterol

A	Cholesterol
B	Aspartic acid
C	Uracil
D	Palmitic acid

Question 16

Most Plant Viruses contain

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

Question 17

Identify the structure of given.. Glutamic Acid

A	Cystein
B	Serine
C	Aspartic acid
D	Glutamic acid

Question 18

The simplest aldose is

A	Glucose
B	Ribose
C	Arabinose
D	Glyceraldehyde

Question 19

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

A	Oligosaccharides
B	Structural Polysaccarides
C	monosaccarides
D	Storage polysaccharides

Question 19 Explanation:

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

Question 20

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

A	Valine
B	Alanine
C	Leucine
D	Cysteine

Question 21

Composition of Raffinose is..

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

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

A	Suspension
B	Coagulation
C	Colloidal
D	Saponification

Question 23

What is the structure of the given biomolecule Chlorophyll b

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

Question 24

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

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

Question 24 Explanation:

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

Question 25

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

Question 25 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.

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Some reference Study materials:

Carbohydrates : Classification and its Basics
Proteins : Basic and Structural organization
What are Lipids ? How to Classify ?
Nucleic Acids : Basics and Types