
Which amino acids have an aromatic ring?
A. Alanine
B. Glycine
C. Tyrosine
D. Lysine
Answer
164.1k+ views
Hint: An aromatic substance is referred to as having an aromatic ring. The molecules that make up proteins have both an acid and an ammoniated group. A peptide bond is created when the acid and ammoniated group lose water. The amino acids are found in zwitter ionic form, where each molecule has a distinct charge.
Complete Step by Step Solution:
An aromatic ring makes up aromatic amino acids. Among the 20 present, there are 3 aromatic amino acids: phenylaniline, tyrosine, and tryptophan. All of the amino acids are necessary. We must obtain essential amino acids through dietary supplements since our bodies cannot generate them. Different illnesses are brought on by a deficiency of necessary amino acids. The absence of phenylaniline hydrolysis, which results in phenylketonuria, is typically the cause of phenylaniline insufficiency. Stunted growth results from tyrosine insufficiency, and Blue diaper syndrome from tryptophan shortage. Tyrosine has a 4-hydroxyphenylalanine structure, therefore an aniline group has a phenyl ring that is aromatic by nature. Foods high in protein are where tyrosine is found. The structure of Tyrosine is given as:

Hence, the correct option is C. Tyrosine.
Additional Information: The structure of the other three compounds are as follows:
The structure of Lysine:

The structure of Glycine:

The structure of Alanine:

Note: The thing to note here is that there are only three aromatic amino acids among the 20 amino acids. The remaining three are Glycine, Alanine and Lysine and they all form a straight chain and no aromatic rings are there in their structure.
Complete Step by Step Solution:
An aromatic ring makes up aromatic amino acids. Among the 20 present, there are 3 aromatic amino acids: phenylaniline, tyrosine, and tryptophan. All of the amino acids are necessary. We must obtain essential amino acids through dietary supplements since our bodies cannot generate them. Different illnesses are brought on by a deficiency of necessary amino acids. The absence of phenylaniline hydrolysis, which results in phenylketonuria, is typically the cause of phenylaniline insufficiency. Stunted growth results from tyrosine insufficiency, and Blue diaper syndrome from tryptophan shortage. Tyrosine has a 4-hydroxyphenylalanine structure, therefore an aniline group has a phenyl ring that is aromatic by nature. Foods high in protein are where tyrosine is found. The structure of Tyrosine is given as:

Hence, the correct option is C. Tyrosine.
Additional Information: The structure of the other three compounds are as follows:
The structure of Lysine:

The structure of Glycine:

The structure of Alanine:

Note: The thing to note here is that there are only three aromatic amino acids among the 20 amino acids. The remaining three are Glycine, Alanine and Lysine and they all form a straight chain and no aromatic rings are there in their structure.
Recently Updated Pages
Environmental Chemistry Chapter for JEE Main Chemistry

JEE Main 2021 July 25 Shift 1 Question Paper with Answer Key

JEE Main 2021 July 22 Shift 2 Question Paper with Answer Key

JEE Atomic Structure and Chemical Bonding important Concepts and Tips

JEE Amino Acids and Peptides Important Concepts and Tips for Exam Preparation

JEE Electricity and Magnetism Important Concepts and Tips for Exam Preparation

Trending doubts
JEE Main 2025 Session 2: Application Form (Out), Exam Dates (Released), Eligibility, & More

Atomic Structure - Electrons, Protons, Neutrons and Atomic Models

Displacement-Time Graph and Velocity-Time Graph for JEE

JEE Main 2025: Derivation of Equation of Trajectory in Physics

Learn About Angle Of Deviation In Prism: JEE Main Physics 2025

Electric Field Due to Uniformly Charged Ring for JEE Main 2025 - Formula and Derivation

Other Pages
JEE Advanced Marks vs Ranks 2025: Understanding Category-wise Qualifying Marks and Previous Year Cut-offs

NCERT Solutions for Class 12 Chemistry Chapter 1 Solutions

Solutions Class 12 Notes: CBSE Chemistry Chapter 1

NCERT Solutions for Class 12 Chemistry Chapter 6 Haloalkanes and Haloarenes

NCERT Solutions for Class 12 Chemistry Chapter 2 Electrochemistry

Electrochemistry Class 12 Notes: CBSE Chemistry Chapter 2
