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#start codon

4 public questions tagged with this topic.

BOTANY

Which of the following codons serves as the start codon in most organisms?

AUG is the start codon, coding for methionine, and serves as the initiation signal for translation. This follows from latest NCERT 2026-27 principle explaining the concept clearly for NEET students in simple steps as per rationalized syllabus.

Ref: NCERT Biology Textbook - Latest Edition for Academic Session 2026-27 (Botany section, Rationalized Textbook for Class XI and XII), Chapter: Biology - Botany portion (Latest NCERT Textbooks for Academic Session 2026-27 -

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Acid, Base, pH

Alternative start codons in bacteria include

GUG and UUG is the scientifically accurate answer to this question. Within the study of Acid, Base, pH, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of GUG and UUG directly address what is being asked. Among the other options, AUG only, AUU and AUA, and UAA and UGA do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2

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Acid, Base, pH

The usual start codon in both PK and EK is

AUG is the scientifically accurate answer to this question. Within the study of Acid, Base, pH, this concept is well-established through extensive research and is documented in standard scientific literature. The specific properties, mechanisms, or characteristics of AUG directly address what is being asked. Among the other options, UUG, GUG, and AUU do not correctly answer this question because they either refer to different concepts, describe properties of other molecules or processes, or represent common misconceptions about this topic.

Ref: Lehninger Principles of Biochemistry, Nelson & Cox, 8th Ed., Ch. 2

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