Which one of the following is wrongly matched?

Question

Match the following genes of the lac operon listed in column ‘A’ with their respective products listed in column ‘B’:
\[ \begin{array}{|c|c|} \hline \textbf{A: Gene} & \textbf{B: Products} \\ \hline \text{a. ‘i’ gene} & \text{(i) β-galactosidase} \\ \text{b. ‘z’ gene} & \text{(ii) lac permease} \\ \text{c. ‘a’ gene} & \text{(iii) repressor} \\ \text{d. ‘y’ gene} & \text{(iv) transacetylase} \\ \hline \end{array} \] Select the correct option:

Answer 1

In this question, we need to identify the option that is wrongly matched with its description. Let's evaluate each option:

Translation - Using information in m-RNA to make protein: This is correctly matched. Translation is the process in which the genetic code carried by mRNA is decoded to produce the specific sequence of amino acids in a polypeptide chain or protein.
Repressor protein - Binds to operator to stop enzyme synthesis: This is also correctly matched. Repressor proteins can bind to operators and prevent the transcription of specific genes, thereby stopping enzyme synthesis.
Operon - Structural genes, operator and promoter: An operon is indeed composed of structural genes, an operator, and a promoter. This is correctly matched as well.
Transcription - Writing information from DNA to t-RNA: This is wrongly matched. Transcription is the process of synthesizing RNA from a DNA template, and it generally involves producing messenger RNA (mRNA), not tRNA. The information from DNA is transcribed into mRNA, which is then used in translation. tRNA serves as an adaptor molecule in translation, not directly synthesized from the DNA template during transcription.

Given the descriptions and processes in molecular biology, the option that is wrongly matched is indeed:

Transcription - Writing information from DNA to t-RNA

Thus, the correct answer is:

Transcription - Writing information from DNA to t-RNA

Answer 2

In this question, we need to identify the option that is wrongly matched with its description. Let's evaluate each option:

Translation - Using information in m-RNA to make protein: This is correctly matched. Translation is the process in which the genetic code carried by mRNA is decoded to produce the specific sequence of amino acids in a polypeptide chain or protein.
Repressor protein - Binds to operator to stop enzyme synthesis: This is also correctly matched. Repressor proteins can bind to operators and prevent the transcription of specific genes, thereby stopping enzyme synthesis.
Operon - Structural genes, operator and promoter: An operon is indeed composed of structural genes, an operator, and a promoter. This is correctly matched as well.
Transcription - Writing information from DNA to t-RNA: This is wrongly matched. Transcription is the process of synthesizing RNA from a DNA template, and it generally involves producing messenger RNA (mRNA), not tRNA. The information from DNA is transcribed into mRNA, which is then used in translation. tRNA serves as an adaptor molecule in translation, not directly synthesized from the DNA template during transcription.

Given the descriptions and processes in molecular biology, the option that is wrongly matched is indeed:

Transcription - Writing information from DNA to t-RNA

Thus, the correct answer is:

Transcription - Writing information from DNA to t-RNA

List I		List II
A	Two or more alternative forms of a gene	I	Back cross
B	Cross of F₁progeny with homozygous recessive parent	II	Ploidy
C	Cross of F progeny with any of the parents	III	Allele
D	Number of chromosome sets in plant	IV	Test cross

Which one of the following is wrongly matched?

The Correct Option is C

Solution and Explanation

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