Match the staining technique/structure in List-I with the correct chemical reagent in List-II.

List-I (Technique/Structure)	List-II (Reagent/Stain)
A. Endospore Staining	I. Crystal Violet
B. Gram Staining (Primary)	II. Malachite Green
C. Fungal Cell Wall	III. Chitin (Stains with Cotton Blue)
D. Bacterial Transformation	IV. DNA (Identified by Avery et al.)

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#Question id: 39495

#Environmental Science

 Unit of sound intensity is:

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#Question id: 39496

#Biochemistry

The function of sigma (σ) factor in prokaryotic transcription is to:

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#Question id: 39497

#Biochemistry

Which DNA repair mechanism removes UV-induced thymine dimers?

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#Question id: 39498

#Biochemistry

 Non-coding regions of eukaryotic genome include:

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#Question id: 39499

#Biochemistry

In the E. coli lac operon, lactose acts as:

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#Question id: 39500

#Biochemistry

The enzyme responsible for DNA amplification in PCR is: