Question:
Identify the amino acid, NOT having nitrogen atom in a side chain.
Identify the amino acid, NOT having nitrogen atom in a side chain.
Show Hint
Check the side chain of each amino acid for an amide, imidazole or indole group.
Updated On: Nov 12, 2026
- Asparagine
- Histidine
- Tryptophan
- Threonine
Show Solution
Verified By Collegedunia
The Correct Option is D
Solution and Explanation
Step 1: Understanding the Concept
Every amino acid has nitrogen in its amino group, but we are asked about nitrogen in the side chain (R group) only.
Step 2: Check the side chains
Asparagine has an amide group in its side chain. Histidine has an imidazole ring with two nitrogen atoms. Tryptophan has an indole ring with one nitrogen.
Step 3: Threonine
The side chain of threonine is \(\text{CH(OH)CH}_{3}\), which contains only carbon, hydrogen and oxygen.
Final Answer:
Threonine has no nitrogen in its side chain. \[ \boxed{\text{(D) }\text{Threonine}} \]
Every amino acid has nitrogen in its amino group, but we are asked about nitrogen in the side chain (R group) only.
Step 2: Check the side chains
Asparagine has an amide group in its side chain. Histidine has an imidazole ring with two nitrogen atoms. Tryptophan has an indole ring with one nitrogen.
Step 3: Threonine
The side chain of threonine is \(\text{CH(OH)CH}_{3}\), which contains only carbon, hydrogen and oxygen.
Final Answer:
Threonine has no nitrogen in its side chain. \[ \boxed{\text{(D) }\text{Threonine}} \]
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Amino Acids Questions
- Which among the following formulae represents the \(\omega\)-amino caproic acid?
- Which amino acid from following contains highest number of N atoms in it?
- Which amino acid from following contains highest number of N atoms in it?
- Which from following amino acids contains heterocyclic ring at a side chain (R) group?
- Which from following is an essential amino acid?
View More Questions
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions