Question:
Which of the following is a stop codon?
Which of the following is a stop codon?
Show Hint
Remember the mnemonic for stop codons: {U Are Annoying} — UAA, UAG, and UGA.
Updated On: Feb 7, 2026
- AUG
- UGG
- UGA
- UAC
Hide Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding codons.
A codon is a sequence of three nucleotides present on mRNA that codes for a specific amino acid or signals the termination of protein synthesis. Codons are read during the process of translation.
Step 2: Identifying stop codons.
In the genetic code, there are three stop codons that do not code for any amino acid. These stop codons signal the end of translation. The three stop codons are:
UAA, UAG, and UGA.
Step 3: Analysis of the given options.
(A) AUG: This is the start codon and codes for the amino acid Methionine.
(B) UGG: This codon codes for the amino acid Tryptophan.
(C) UGA: This is a stop codon and signals termination of protein synthesis.
(D) UAC: This codon codes for the amino acid Tyrosine.
Step 4: Conclusion.
Among the given options, UGA is the correct stop codon that terminates translation.
A codon is a sequence of three nucleotides present on mRNA that codes for a specific amino acid or signals the termination of protein synthesis. Codons are read during the process of translation.
Step 2: Identifying stop codons.
In the genetic code, there are three stop codons that do not code for any amino acid. These stop codons signal the end of translation. The three stop codons are:
UAA, UAG, and UGA.
Step 3: Analysis of the given options.
(A) AUG: This is the start codon and codes for the amino acid Methionine.
(B) UGG: This codon codes for the amino acid Tryptophan.
(C) UGA: This is a stop codon and signals termination of protein synthesis.
(D) UAC: This codon codes for the amino acid Tyrosine.
Step 4: Conclusion.
Among the given options, UGA is the correct stop codon that terminates translation.
Was this answer helpful?
0
0
Top Questions on Zoology
- Which phase of the cell cycle is known as the resting phase?
- Imagine a population of diploid species in Hardy-Weinberg equilibrium. The population has two alleles for a gene which are ‘a’ and ‘A’. The number of individuals with ‘aa’ genotype in this population is 1 in 10000. The frequency of the allele ‘A’ in the population is ............ (up to two decimal places)
- The mother and the father of five children are carriers (heterozygous) of an autosomal recessive allele that causes cystic fibrosis. The probability of having exactly three normal children among five is ........ (up to two decimal places).
- An enzyme, which follows Michaelis-Menten equation, catalyzes the reaction A\(\rightarrow\)B. When enzyme and substrate concentrations are 15 nM and 10 \(\mu\)M, respectively, the reaction velocity is 5 \(\mu\)M s\(^{-1}\). If \(K_m\) for the substrate A is 5 \(\mu\)M, the kinetic efficiency of the enzyme will be ______ \(\times 10^6\) M\(^{-1}\) s\(^{-1}\) (in integer).
- A PCR was setup to amplify a 500 nucleotides-long DNA. The dNTPs in the reaction mixture were radiolabeled. The percentage (%) of radiolabeled single-stranded DNA after three cycles will be ............ (up to one decimal place)
View More Questions
Questions Asked in GATE XL exam
- Which pyramid is always upright in an ecosystem?
- Which enzyme is used to join two DNA fragments in genetic engineering?
- GATE XL - 2026
- Biotechnology
- The DNA double helix is stabilized primarily by:
- The process of conversion of nitrogen into ammonia by bacteria is called:
- GATE XL - 2026
- Microbiology
- Which of the following amino acids is essential in human diet?
- GATE XL - 2026
- Biochemistry
View More Questions