- ADNA
- BProtein
- CmRNA
- DEnzyme
Explanation:
Transcription is when RNA is made from DNA. During transcription, RNA polymerase makes a copy of a gene from the DNA to mRNA as needed. This process is similar in eukaryotes and prokaryotes.
One difference, however, is that eukaryotic RNA polymerase associates with mRNA-processing enzymes during transcription so that processing can proceed quickly after the start of transcription.
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Statement $I$ : Bt toxins are insect group specific and coded by a gene cry $IAc$.
Statement $II$ : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic $\mathrm{pH}$ of the insect gut.
In the light of the above statements, choose the correct answer from the options given below: