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Test: Biomolecules Level - 4 - Chemistry MCQ


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30 Questions MCQ Test - Test: Biomolecules Level - 4

Test: Biomolecules Level - 4 for Chemistry 2024 is part of Chemistry preparation. The Test: Biomolecules Level - 4 questions and answers have been prepared according to the Chemistry exam syllabus.The Test: Biomolecules Level - 4 MCQs are made for Chemistry 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Biomolecules Level - 4 below.
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Test: Biomolecules Level - 4 - Question 1
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Which of the following compounds will form an osazone derivative?

Detailed Solution for Test: Biomolecules Level - 4 - Question 1

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
Test: Biomolecules Level - 4 - Question 2
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Which of the following pairs give the same osazone?

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Test: Biomolecules Level - 4 - Question 3
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 on epimerization with base gives 

Test: Biomolecules Level - 4 - Question 4
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D-glucose and D-galactose are:
Detailed Solution for Test: Biomolecules Level - 4 - Question 4

Epimers are carbohydrates which vary in one position for the placement of the -OH group. The best examples are for D-glucose and D-galactose. Both monosaccharides are D-sugars, meaning that the -OH group on carbon-5 of these hexoses is located on the right in Fischer Projection.

 

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Test: Biomolecules Level - 4 - Question 5
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Which of the following pairs form the same osazone?
Detailed Solution for Test: Biomolecules Level - 4 - Question 5

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.

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Test: Biomolecules Level - 4 - Question 6
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The following carbohydrate is: 
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Test: Biomolecules Level - 4 - Question 7
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The correct statement(s) about the following sugars X and Y is/are:
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Test: Biomolecules Level - 4 - Question 8
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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:
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Test: Biomolecules Level - 4 - Question 9
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Which of the following are non-covalent interactions important is maintaining the secondary, tertiary and quaternary aspects of amino acids:
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Test: Biomolecules Level - 4 - Question 10
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Which pair(s) of amino acids cannot have hydrophobic interactions:
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Test: Biomolecules Level - 4 - Question 11
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Which of the following regarding steroids is/are correct:
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Test: Biomolecules Level - 4 - Question 12
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Which of the following statement regarding to properties of starch is/are correct:
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Test: Biomolecules Level - 4 - Question 13
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Which of the following pair regarding to biological importance of carbohydrates is/are correctly matched:
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Test: Biomolecules Level - 4 - Question 14
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Which of the following regarding to the examples of Keto sugar is/are correct:
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Test: Biomolecules Level - 4 - Question 15
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Which of the following pairs is/are correctly matched:
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Test: Biomolecules Level - 4 - Question 16
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D-Glucose exist in x different forms. The value of x(stereoisomer) is:

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Test: Biomolecules Level - 4 - Question 17
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The number of peptide in the compound:

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Test: Biomolecules Level - 4 - Question 18
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How many of the following carbohydrate would not undergo mutarotaion in aqueous solutions:

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Test: Biomolecules Level - 4 - Question 19
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The number of reducing sugars among the following is…………….. [IIT JAM 2017]

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Test: Biomolecules Level - 4 - Question 20
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How many isophene unit are present in the following compound:

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Test: Biomolecules Level - 4 - Question 21
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How many of the following are the correct match:

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Test: Biomolecules Level - 4 - Question 22
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Number of isoprene unit in the given compound is:

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Test: Biomolecules Level - 4 - Question 23
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In fructose the possible optical iso mer are:

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Test: Biomolecules Level - 4 - Question 24
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How many of the following will give same product on reaction with PhNHNH2 (excess):

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Test: Biomolecules Level - 4 - Question 25
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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.

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Test: Biomolecules Level - 4 - Question 26
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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.

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Test: Biomolecules Level - 4 - Question 27
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The number of hydrogen bond present in Guanine-Cytosine base pair is:

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Test: Biomolecules Level - 4 - Question 28
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How many of the following are reducing sugar:

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

Detailed Solution for Test: Biomolecules Level - 4 - Question 28

The aldehyde group of aldoses is very susceptible to oxidation, whereas ketoses are less so, but can easily be oxidized if, like fructose, they contain an α-hydroxyl and can tautomerize to an aldose. Most monosaccharides are reducing sugars. This includes all of the common ones galactose, glucose, fructose, ribose, xylose, and mannose. Some disaccharides, such as lactose and maltose are reducing sugars since they have at least one anomeric carbon free, allowing that part of the sugar to linearize and yield an aldose.

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Test: Biomolecules Level - 4 - Question 29
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How many different tripeptides can be obtained from alanine, glycine and phenylalanine, each tripeptide containing all the three amino acids?

Detailed Solution for Test: Biomolecules Level - 4 - Question 29

3 x 2 x 1 = 6 tripedes are possible if each is used only once : AGF,AFG,GAF,GFA,FAG,FGA

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Test: Biomolecules Level - 4 - Question 30
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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.

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