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JEE Exam  >  JEE Tests  >  Test: Properties and Preparation of Amino Acids - JEE MCQ

Test: Properties and Preparation of Amino Acids - JEE MCQ


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15 Questions MCQ Test - Test: Properties and Preparation of Amino Acids

Test: Properties and Preparation of Amino Acids for JEE 2024 is part of JEE preparation. The Test: Properties and Preparation of Amino Acids questions and answers have been prepared according to the JEE exam syllabus.The Test: Properties and Preparation of Amino Acids MCQs are made for JEE 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Properties and Preparation of Amino Acids below.
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Test: Properties and Preparation of Amino Acids - Question 1
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The hormone which controls the processes of burning of fats, proteins and carbohydrates to liberate energy in the body is

Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 1
Thyroxine is the hormone that helps in the regulation of the metabolism of the body i.e., burning of fats, proteins, and carbohydrates.
Adrenaline is released in extreme conditions like - fear, etc.
Insulin helps in the conversion of glucose to glycogen.
Cortisol is one of the steroid hormones which help in a stressful situation.
Test: Properties and Preparation of Amino Acids - Question 2
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Which one of the following is an amine hormone?

Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 2
Thyroxine is an amine hormone.
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Test: Properties and Preparation of Amino Acids - Question 3
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The correct statement in respect of protein haemoglobin is that it

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Haemoglobin acts as an oxygen carrier in the blood since it reacts with oxygen to form unstable oxyhaemoglobin which easily breaks to give back haemoglobin and oxygen.
Test: Properties and Preparation of Amino Acids - Question 4
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Which is not a true statement?
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 4

Amino acids are organic compounds that contain amine and carboxyl (-COOH) functional groups, along with a side chain (R group) specific to each amino acid. a -carbon of cc-amino acid is asymmetric. Hence this statement is true. Proteins exist in both D and L-form. So, option (2) is an incorrect statement. The body synthesizes all of its own proteins. The proteins that you obtain through your food are broken down in the digestive system into individual amino acids, which enter the blood stream in the small intestine. From there, they are transported by the blood stream into cells, where they are reassembled into new proteins with the help of ribosomes. This is necessary because proteins are specialized molecules that have to be built in a precise manner in order to perform their function. At , both amino and carboxylic groups exist in ionised form i.e. zwitter ion.

Test: Properties and Preparation of Amino Acids - Question 5
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Which of the following is a steroid hormone?
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 5
Progesterone (Gestogens) is a steroid hormone, which controls the development and maintainance of pregnancy. Thryoxine and adrenaline are amine hormones.
Test: Properties and Preparation of Amino Acids - Question 6
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Which one of the following enzymes converts proteins into amino acids?
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 6
The enzymatic activity of trypsin converts proteins into amino acids. Trypsin is a pancreatic enzyme, which activates the other pancreatic enzymes like chymotrypsin, carboxy polypeptidase, etc. These enzymes along with trypsin convert proteins and peptones into dipeptides first and then finally into amino acids.
Test: Properties and Preparation of Amino Acids - Question 7
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Which statement is incorrect about peptide bond?
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 7

Due to resonance,

bond acquires some double bond character, hence shorter in length

Test: Properties and Preparation of Amino Acids - Question 8
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Assume that a particular amino acid has an isoelectric point of In a solution at which of the following species will predominate?
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In acidic medium Zwitter ion convert into
Test: Properties and Preparation of Amino Acids - Question 9
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A mixture of two amino acids having pI and can be separated
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 9
Every amino acid exists exclusively as dipolar ion when the of the solution is equal to its isoelectric point (pI), hence at this it does not migrate to either electrode, while at other , an amino acid migrates either to cathode or to anode depending upon its pI. Thus at , amino acid with pI will exist as an anion and migrate to anode; while that with pI will not migrate to any electrode.
Test: Properties and Preparation of Amino Acids - Question 10
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Imino acid among these compounds is
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Proline contains imino (secondary amino),
Test: Properties and Preparation of Amino Acids - Question 11
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Which amino acid is achiral?
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 11
All are chiral.
Test: Properties and Preparation of Amino Acids - Question 12
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Iso-electric point of alanine is . At which pH, maximum concentration of zwitter ion of alanine will be present?
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 12
At isoelectric point, conc. of Zwitter ion will be maximum.
Test: Properties and Preparation of Amino Acids - Question 13
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Product (B) of given reaction is:
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Test: Properties and Preparation of Amino Acids - Question 14
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The dipeptide, Gly. Ala has structure -
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 14
By convention, the amino acid with the free amino group (N-terminal) is written at the left end and the one with the unreacted carboxyl group (C-terminal) at the right end. Thus, the structure of Gly. Ala is
Test: Properties and Preparation of Amino Acids - Question 15
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What is the monomer of polypeptide
Detailed Solution for Test: Properties and Preparation of Amino Acids - Question 15
Polypeptide chains are long strings of amino acids held together by peptide bonds.
Amino Acids are linked by Peptide Bonds to form Polypeptide chains. Proteins are linear polymers formed by linking the a-carboxyl group of one amino acid to the -amino group of another amino acid with a peptide bond (also called an amide bond).
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