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

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

Question 2

Inulin is a

A	Fructosan
B	Hormone
C	Xylan
D	Glucosan

Question 3

Most Plant Viruses contain

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

Question 4

Composition of Raffinose is..

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

Question 4 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 5

The correct configuration for given structure is...  

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

Question 6

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	Carbonyl group and Ketone group
D	None of these

Question 6 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 7

Identify the structure..

A	Cholesterol
B	Uracil
C	Palmitic acid
D	Aspartic acid

Question 8

Which of the following statement is not correct?

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

Question 8 Explanation: 

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

Question 9

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	None of the above
D	Both A and B

Question 9 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 10

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

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

Question 10 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 11

The simplest aldose is

A	Arabinose
B	Ribose
C	Glyceraldehyde
D	Glucose

Question 12

What is the structure of the given biomolecule

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

Question 13

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

A	Leucine
B	Alanine
C	Cysteine
D	Valine

Question 14

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

A	Storage polysaccharides
B	Oligosaccharides
C	monosaccarides
D	Structural Polysaccarides

Question 14 Explanation: 

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

Question 15

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

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

Question 16

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

A	Suspension
B	Coagulation
C	Colloidal
D	Saponification

Question 17

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

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

Question 17 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 18

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

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

Question 19

Identify the structure of given..  

A	Glutamic acid
B	Aspartic acid
C	Cystein
D	Serine

Question 20

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 20 Explanation: 

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

Question 21

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

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

Question 22

Glutathione is a

A	dipeptide
B	Tetrapeptide
C	Octapeptide
D	Tripeptide

Question 23

In sicle-cell anemia the abnormal Hb is

A	HbF
B	HbS
C	HbM
D	HbA2

Question 24

Mostly all the sugars in Plants are...

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

Question 25

Sucrose is composed of...

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

Question 25 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.

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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