NEET2026BiologyChapterActual
Statement I: The codon UUU codes for phenylalanine in bacteria, but it codes for a different amino acid in humans due to the non-universal nature of the genetic code. Statement II: The codons UAA, UAG, and UGA do not code for any amino acids and function as terminator codons. In the light of the above statements, choose the correct answer from the options given below.
Options
- ABoth Statement I and Statement II are correct
- BBoth Statement I and Statement II are incorrect
- CStatement I is correct but Statement II is incorrect
- DStatement I is incorrect but Statement II is correct
Correct answer
D. Statement I is incorrect but Statement II is correct
Step-by-step solution
The genetic code is nearly universal. For example, from bacteria to humans, the codon UUU codes for the amino acid Phenylalanine (Phe). Therefore, Statement I is incorrect. There are three codons, UAA, UAG, and UGA, which do not code for any amino acids. They function as stop or terminator codons during protein synthesis. Therefore, Statement II is correct. Hence, Statement I is incorrect but Statement II is correct. Answer: Statement I is incorrect but Statement II is correct