Question:

A protein ' $X$ ' with molecular weight of $70,000 u$, on hydrolysis gives amino acids One of these amino acid is

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In proteins, the amino acids that result from hydrolysis are generally \( \alpha \)-Amino acids, which have the amino group attached to the carbon adjacent to the carboxyl group.
Updated On: Mar 21, 2025
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The Correct Option is B

Approach Solution - 1

Only in option (2) a-Amino acid is given all the other options are not a-Amino acids.

amino acid
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Approach Solution -2

Step 1: The given molecule has the structure of an amino acid, which is identified by the presence of both a carboxyl group (-COOH) and an amine group (-NH₂).

Step 2: The structure shown in the second image matches the chemical structure of Leucine, which is a branched-chain amino acid (BCAA). The chemical formula of Leucine is C₆H₁₃NO₂, and its side chain contains an isopropyl group (–CH₃) attached to a central carbon.

Step 3: The molecular weight of Leucine is approximately 131.17 g/mol, and it is one of the amino acids that could be released upon hydrolysis of a protein like 'X' with the molecular weight of 70,000u.

Thus, the correct answer is option (B) Leucine.


 

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Concepts Used:

Organic Chemistry - Some Basic Principles and Techniques

Organic Chemistry is a subset of chemistry dealing with compounds of carbon. Therefore, we can say that Organic chemistry is the chemistry of carbon compounds and is 200-225 years old. Carbon forms bond with itself to form long chains of hydrocarbons, e.g.CH4, methane and CH3-CH3 ethane. Carbon has the ability to form carbon-carbon bonds quite elaborately. Polymers like polyethylene is a linear chain where hundreds of CH2 are linked together. 

Read Also: Organic Compounds

Importance of Organic Chemistry:

Organic chemistry is applicable in a variety of areas including-

  • Medicines: Example- Aspirin which is a headache medicine and Ibuprofen is a painkiller, both are organic compounds. Other examples include paracetamol.
  • Food: Example- Starch which is a carbohydrate is an organic compound and a constituent of rice and other grains. It is the source of energy.
  • Clothing: Example- Nylon, Polyester and Cotton are forms of organic compounds.
  • Fuels: Examples- Gasoline, Petrol and Diesel are organic compounds used in the automobile industry at large.