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

The simplest aldose is

A	Glucose
B	Ribose
C	Glyceraldehyde
D	Arabinose

Question 2

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

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

Question 2 Explanation:

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

Question 3

Identify the structure.. Cholesterol

A	Palmitic acid
B	Uracil
C	Cholesterol
D	Aspartic acid

Question 4

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

A	Alanine
B	Cysteine
C	Valine
D	Leucine

Question 5

In sicle-cell anemia the abnormal Hb is

A	HbS
B	HbM
C	HbA2
D	HbF

Question 6

Glutathione is a

A	Octapeptide
B	Tripeptide
C	dipeptide
D	Tetrapeptide

Question 7

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

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

Question 8

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

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

Identify the structure of given.. Glutamic Acid

A	Glutamic acid
B	Serine
C	Aspartic acid
D	Cystein

Question 10

Inulin is a

A	Xylan
B	Fructosan
C	Glucosan
D	Hormone

Question 11

Most Plant Viruses contain

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

Question 12

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	beta - form
C	alpha - form
D	Both A and B

Question 12 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 13

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

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

Question 13 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 14

Composition of Raffinose is..

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

Question 14 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 15

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

A	Oligosaccharides
B	monosaccarides
C	Storage polysaccharides
D	Structural Polysaccarides

Question 15 Explanation:

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

Question 16

What is the structure of the given biomolecule Chlorophyll b

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

Question 17

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

A	Colloidal
B	Suspension
C	Saponification
D	Coagulation

Question 18

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

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

Question 19

Sucrose is composed of...

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

Question 19 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 20

Which of the following statement is not correct?

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

Question 20 Explanation:

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

Question 21

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

Question 22

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

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

Question 22 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 23

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

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

Question 24

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

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

Question 25

Mostly all the sugars in Plants are...

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

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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