64 Codons constitute genetic code because -

Options

A. There was 64 types of amino acid
B. 64 types of t-RNA
C. Genetic code is triplet
D. There are 64 enzyme

Answer

To answer the question "64 Codons constitute genetic code because -", we can break it down step by step.

### Step-by-Step Solution:

1. **Understand the Components of Genetic Code**:
- The genetic code is made up of sequences of nucleotides (the building blocks of RNA and DNA).
- In RNA, there are four types of nucleotides represented by the bases: Adenine (A), Uracil (U), Guanine (G), and Cytosine (C).

2. **Codon Formation**:
- A codon is a sequence of three nucleotides.
- Since there are four different bases and the code is triplet in nature, the total number of possible codons can be calculated using the formula \(4^3\) (4 bases raised to the power of 3).
- This results in \(4 \times 4 \times 4 = 64\) possible combinations, hence 64 codons.

3. **Function of Codons**:
- Out of the 64 codons, 61 codons are used to code for the 20 different amino acids that make up proteins.
- The remaining 3 codons are known as stop codons (UAA, UAG, UGA), which signal the termination of protein synthesis.

4. **Clarification of Misconceptions**:
- It is incorrect to say there are 64 types of amino acids; there are only 20 standard amino acids.
- It is also incorrect to state there are 64 types of tRNA; there are many more tRNA molecules than codons due to the redundancy in the genetic code (some amino acids are coded by more than one codon).

5. **Conclusion**:
- Therefore, the statement that "64 codons constitute genetic code because" is correct due to the triplet nature of the code, which allows for the formation of 64 unique codons from the four nucleotide bases.

### Final Answer:
64 Codons constitute genetic code because the genetic code is triplet in nature, allowing for \(4^3 = 64\) possible combinations of the four nucleotide bases (A, U, G, C).

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