मराठी

The first codon to be deciphered was ______ which codes for ______.

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प्रश्न

The first codon to be deciphered was ______ which codes for ______.

पर्याय

  • AAA, proline

  • GGG, alanine

  • UUU, Phenylalanine

  • TTT, arginine

MCQ
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उत्तर

The first codon to be deciphered was UUU which codes for Phenylalanine.

Explanation:

In 1961, Marshall Nirenberg and Heinrich Matthaei performed a groundbreaking experiment to begin “cracking” the genetic code. They used a synthetic poly-U RNA strand (made entirely of Uracil bases) in a cell-free system. They discovered that this UUU message led to the creation of a protein chain consisting solely of the amino acid phenylalanine. This was the first time a specific codon was successfully matched to a specific amino acid, marking a massive milestone in molecular biology.
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पाठ 5: Molecular Genetics - Evaluation [पृष्ठ ८५]

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संबंधित प्रश्‍न

Write the contributions of the following scientists in deciphering the genetic code.
George Gamow; Hargobind Khorana; Marshall Nirenberg; Severo Ochoa


One of the following is true with respect to AUG.


DNA is a polymer of nucleotides which are linked to each other by 3’-5’ phosphodiester bond. To prevent polymerisation of nucleotides, which of the following modifications would you choose?


Genetic code is ______.


The number of base substitution possible in amino acid codons is ______.


Which out of the following statements is incorrect?


The mutations that involve addition, deletion or substitution of a single pair in a gene are referred to as ______.


Select the incorrectly matched pair.


AUG on the mRNA will result in the activation of which of the following RNA having the correct combination of amino acids: 

  Site A Site B
A. UAC Methionine
B. Methionine UAC
C. Methionine AUG
D. AUG Methionine

Percentage of mitochondrial DNA in the cell is:


Methionine carrying tRNA has anticodon:


Frame shift mutations are caused by ______.


A single base mutation in a gene may not ‘always’ result in loss or gain of function. Do you think the statement is correct? Defend your answer.


Given below is a sequence of bases in mRNA of a bacterial cell. Identify the amino acid that would be incorporated at codon position 3 and codon position 5 during the process of its translation.
3' AUCAGGUUUGUGAUGGUACGA 5'


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How many codons in total exist in the genetic code?


Which of the following statements about stop codons is correct?


What is the start codon and which amino acid does it code for?


Which scientist developed a method for synthesizing RNA molecules with repeated known nucleotide sequences to help decipher the genetic code?


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