Test: Biomolecules- 4


30 Questions MCQ Test Organic Chemistry | Test: Biomolecules- 4


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QUESTION: 1

Which of the following compounds will form an osazone derivative?

Solution:

When sugars are reacted with excess of phenylhydrazine osazone formation takes place.

Osazone will form in that sugar only where keto hydroxy group is present.

Thus CH3​CH2​COCH2​OH will form an osazone derivative; as it has keto hydroxy group.

*Multiple options can be correct
QUESTION: 2

Which of the following pairs give the same osazone?

Solution:
*Multiple options can be correct
QUESTION: 3

 on epimerization with base gives 

Solution:
*Multiple options can be correct
QUESTION: 4

D-glucose and D-galactose are:

Solution:
*Multiple options can be correct
QUESTION: 5

Which of the following pairs form the same osazone?

Solution:

When sugars react with an excess of phenylhydrazine, a class of compounds known as osazone is formed. 

 

Glucose and fructose differ in the arrangement of atoms around the C−1 and C−2 carbon. When both of them react with three molecules of phenylhydrazine, the formation of osazone crystals makes the difference between the carbon atoms in their chain and hence they form the same osazone.

*Multiple options can be correct
QUESTION: 6

The following carbohydrate is: 

Solution:
*Multiple options can be correct
QUESTION: 7

The correct statement(s) about the following sugars X and Y is/are:

Solution:
*Multiple options can be correct
QUESTION: 8

Consider the following reaction. 

Among the following, the compound(s) whose osazone derivative(s) will have the same melting point as that of X is/are:

Solution:
*Multiple options can be correct
QUESTION: 9

Which of the following are non-covalent interactions important is maintaining the secondary, tertiary and quaternary aspects of amino acids:

Solution:
*Multiple options can be correct
QUESTION: 10

Which pair(s) of amino acids cannot have hydrophobic interactions:

Solution:
*Multiple options can be correct
QUESTION: 11

Which of the following regarding steroids is/are correct:

Solution:
*Multiple options can be correct
QUESTION: 12

Which of the following statement regarding to properties of starch is/are correct:

Solution:
*Multiple options can be correct
QUESTION: 13

Which of the following pair regarding to biological importance of carbohydrates is/are correctly matched:

Solution:
*Multiple options can be correct
QUESTION: 14

Which of the following regarding to the examples of Keto sugar is/are correct:

Solution:
*Multiple options can be correct
QUESTION: 15

Which of the following pairs is/are correctly matched:

Solution:
*Answer can only contain numeric values
QUESTION: 16

D-Glucose exist in x different forms. The value of x(stereoisomer) is:


Solution:
*Answer can only contain numeric values
QUESTION: 17

The number of peptide in the compound:


Solution:
*Answer can only contain numeric values
QUESTION: 18

How many of the following carbohydrate would not undergo mutarotaion in aqueous solutions:


Solution:
*Answer can only contain numeric values
QUESTION: 19

The number of reducing sugars among the following is…………….. [IIT JAM 2017]


Solution:
*Answer can only contain numeric values
QUESTION: 20

How many isophene unit are present in the following compound:


Solution:
*Answer can only contain numeric values
QUESTION: 21

How many of the following are the correct match:


Solution:
*Answer can only contain numeric values
QUESTION: 22

Number of isoprene unit in the given compound is:


Solution:
*Answer can only contain numeric values
QUESTION: 23

In fructose the possible optical iso mer are:


Solution:
*Answer can only contain numeric values
QUESTION: 24

How many of the following will give same product on reaction with PhNHNH2 (excess):


Solution:
*Answer can only contain numeric values
QUESTION: 25

For  Glutamic acid value of pKa, pKa2, pKa3 are 2.00, 4.65 and 9.98 respectively. At which pH Glutomic acid will not be obtained during electroproresis at any one of the electrodes.


Solution:
*Answer can only contain numeric values
QUESTION: 26

How many statements about peptides are correct.
(a) A dipeptide has two peptide linkage between amino acids.
(b) If only one amino group and one carboxylic acid group are available for the reaction, then only one dipeptide can form.
(c) By convention N-terminus is kept left and (–terminus) at siglate in the structure of a pepetide.
(d) A polypeptide with more than hundred amino acid residures (mal . mass > 10,000) is called a protein.


Solution:
*Answer can only contain numeric values
QUESTION: 27

The number of hydrogen bond present in Guanine-Cytosine base pair is:


Solution:
*Answer can only contain numeric values
QUESTION: 28

How many of the following are reducing sugar:

Sucrose, Lactose, Maltose, Glucose, Galactose, Fructose, Glycogen, Ribose.


Solution:
*Answer can only contain numeric values
QUESTION: 29

The total number of dipeptide can be made from these amino acids.


Solution:
*Answer can only contain numeric values
QUESTION: 30

Find the value of x + y for
Tyr-Ile-Gln-Arg-Leu-Gly-Phe-Lys-Asn-Trp-Pne-Gly-Ala-Lys-Gln-Gln-NH2
Where
X = Number of fragments obtained by the cleavage of Trypsin.
Y = Number of fragments obtained by the cleavage of chemotrpsin.


Solution:

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