Biomolecules Practice Test 1

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.

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

• CSIR UGC NET Compulsory – Model Paper 1
• CSIR UGC NET Compulsory – Model Paper 2
• CSIR UGC NET Compulsory – Model Paper 3

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

This is the smart MCQ exam on "Biomolecules".

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Question 1

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

A	Oligosaccharides
B	Storage polysaccharides
C	monosaccarides
D	Structural Polysaccarides

Question 1 Explanation: 

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

Question 2

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

Question 2 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 3

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

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

Question 3 Explanation: 

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

Question 4

Identify the structure of given..  

A	Serine
B	Aspartic acid
C	Cystein
D	Glutamic acid

Question 5

In sicle-cell anemia the abnormal Hb is

A	HbM
B	HbA2
C	HbF
D	HbS

Question 6

The correct configuration for given structure is...  

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

Question 7

Glutathione is a

A	Tetrapeptide
B	Tripeptide
C	Octapeptide
D	dipeptide

Question 8

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 9

Mostly all the sugars in Plants are...

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

Question 10

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

Question 11

What is the structure of the given biomolecule

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

Question 12

Sucrose is composed of...

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

Question 12 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 13

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

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

Question 13 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 14

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

A	Cysteine
B	Leucine
C	Valine
D	Alanine

Question 15

Which of the following statement is not correct?

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

Question 15 Explanation: 

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

Question 16

The simplest aldose is

A	Ribose
B	Arabinose
C	Glyceraldehyde
D	Glucose

Question 17

Inulin is a

A	Xylan
B	Hormone
C	Glucosan
D	Fructosan

Question 18

Most Plant Viruses contain

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

Question 19

Composition of Raffinose is..

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

Question 19 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 20

Identify the structure..

A	Uracil
B	Palmitic acid
C	Cholesterol
D	Aspartic acid

Question 21

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

A	Suspension
B	Colloidal
C	Saponification
D	Coagulation

Question 22

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

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

Question 23

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

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

Question 23 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 24

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

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

Question 24 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 25

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

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

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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