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Biomolecules & Amines - Class 12 MCQ


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30 Questions MCQ Test - Biomolecules & Amines

Biomolecules & Amines for Class 12 2024 is part of Class 12 preparation. The Biomolecules & Amines questions and answers have been prepared according to the Class 12 exam syllabus.The Biomolecules & Amines MCQs are made for Class 12 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Biomolecules & Amines below.
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Biomolecules & Amines - Question 1

The reagent which form crystalline osazone derivative when treated with glucose is:    

Detailed Solution for Biomolecules & Amines - Question 1

Osazone is a condenstion product of glucose & phenylhydrazine

Biomolecules & Amines - Question 2

The bond that determines the secondary structure of a protein is:    

Detailed Solution for Biomolecules & Amines - Question 2

10 structure involves peptide bond while 20 structure (β-pleated or α-Helix) is formed by H-bonding

Biomolecules & Amines - Question 3

The final product (B) is :

Detailed Solution for Biomolecules & Amines - Question 3

A : CH3CH2NC        B:    CH3CH2NHCH3

Biomolecules & Amines - Question 4

he final product (Y) is :

Detailed Solution for Biomolecules & Amines - Question 4

X : Antimarkownikoff’s addition

Y : Condensation followed by reduction

Biomolecules & Amines - Question 5

Among the following compounds which one will produce a Schiff base on reaction with cyclopentanone?    

Detailed Solution for Biomolecules & Amines - Question 5

Schiff’s base is imine formed by condensation between carbonyl compounds & 10 amines

Biomolecules & Amines - Question 6

The major product (X) of the reaction is :

Detailed Solution for Biomolecules & Amines - Question 6

NO2 is more reactive than ester, So, NO2 is reduced to NH2 which gives intramolecular reaction on ester.

Biomolecules & Amines - Question 7

Secondary structure of proteins refers to:    

Detailed Solution for Biomolecules & Amines - Question 7

Conceptual

Biomolecules & Amines - Question 8

DNA moecule is formed of     

Detailed Solution for Biomolecules & Amines - Question 8

Conceptual

Biomolecules & Amines - Question 9

Ring structure of glucose is due to formation of hemiacetal and ring formation between    

Detailed Solution for Biomolecules & Amines - Question 9

Glucose exists as glucopyranose which is a six-membered cyclic structure

Biomolecules & Amines - Question 10

α-D-Glucopyranose and β-D-Glucopyranose are :    

Detailed Solution for Biomolecules & Amines - Question 10

Anomers are formed by difference in arrangement of H & OH on 1st cabon.

Biomolecules & Amines - Question 11

Glucose and galactose differ in configuration at :    

Detailed Solution for Biomolecules & Amines - Question 11

Conceptual

Biomolecules & Amines - Question 12

Which of the following gives an opticaly inactive aldaric acid on oxidation with dilute HNO3 acid?

Detailed Solution for Biomolecules & Amines - Question 12

Aldaric acid is dicarboxylic acid

Optically inactive due to plane of symnetry
 

Biomolecules & Amines - Question 13

A tripeptide is written as glycine-Alanine- Glycine. Th correct structure of tripeptide.

Detailed Solution for Biomolecules & Amines - Question 13

Biomolecules & Amines - Question 14

What is the product of the following reaction?

Detailed Solution for Biomolecules & Amines - Question 14

Biomolecules & Amines - Question 15

Arrange the following compounds in decreasing order of their basic character :

Detailed Solution for Biomolecules & Amines - Question 15

Basic character is  ability to donate lone pair, it is highest for (III) & least for (I) as (I) is aromatic.

Biomolecules & Amines - Question 16

What is the end product in the following sequence of reaction ?                

Detailed Solution for Biomolecules & Amines - Question 16

Biomolecules & Amines - Question 17

Identify the end product Z in the following sequence:

Detailed Solution for Biomolecules & Amines - Question 17

X : is phenol as temperature is 320K 

Biomolecules & Amines - Question 18

Arrange the following amines in order of increasing basicity :              

     

Detailed Solution for Biomolecules & Amines - Question 18

(III) is aliphatic amine while all others  are aromatic , So, (III) is most basic. CH3 has +I effect while CF3 has-I effect.

Biomolecules & Amines - Question 19

The end product of the reactions,

Detailed Solution for Biomolecules & Amines - Question 19

Biomolecules & Amines - Question 20

In the following reaction:   the product A is :    

Detailed Solution for Biomolecules & Amines - Question 20

Carbylamine reaction

Biomolecules & Amines - Question 21

Arrange the following:  CH3NH2(I) ; (CH3)2NH(II) ;    C6H5NH2(III)  and (CH3)2N (IV)    in increasing order of basicity in aqueous medium :    

Detailed Solution for Biomolecules & Amines - Question 21

(III) is a least basic as lp of nitrogen is  involved in resonance. In aqueous solution, 20 amines are stronger bases due to hydration effect.

Biomolecules & Amines - Question 22

Which of the following reaction will not give primary amine ?    

Detailed Solution for Biomolecules & Amines - Question 22

Isocyanides an reduction give 20 amines 

Biomolecules & Amines - Question 23

Which of the following compounds exists as non-resovable racemic mixture?

 

Detailed Solution for Biomolecules & Amines - Question 23

When nitrogen is stereocentre with, lp it shows umbrella inversion

Biomolecules & Amines - Question 24

Which of the following molecules is capable of forming zwitter ion?    

Detailed Solution for Biomolecules & Amines - Question 24

Zwitter ion is a dipolar ion, formed in those compounds which have acidic & basic group.

Biomolecules & Amines - Question 25

Hydrolysis of sucrose is called :    

Detailed Solution for Biomolecules & Amines - Question 25

It is known as inversion as optical behaviour changes from dextro to laevo

Biomolecules & Amines - Question 26

Which of the following statements about ribose in incorrect?        

Detailed Solution for Biomolecules & Amines - Question 26

Conceptual

Biomolecules & Amines - Question 27

Glucose cannot be classified as :    

Detailed Solution for Biomolecules & Amines - Question 27

Glucose is a monosaccharide

Biomolecules & Amines - Question 28

The product formed in the reaction is:

Detailed Solution for Biomolecules & Amines - Question 28

Amides on reduction give amines

Biomolecules & Amines - Question 29

The reaction of p-aminophenol with one mole of acetyl chloride in presence of pyridine gives:

 

Detailed Solution for Biomolecules & Amines - Question 29

Acetylation of NH2 group takes place & product is known as paracetamol.

Biomolecules & Amines - Question 30

Which of the following compounds will behave as a reducing sugar in an aqueous KOH soution?

Detailed Solution for Biomolecules & Amines - Question 30

Sugars that have an aldehyde, a ketone, a hemiacetal or a hemiketal group is able to reduce an oxidising agent.These sugars are classified as reducing sugars.

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