According to the manner in which they work, three main classes of proteins that modify chromatin are recognized. Match the following classes of proteins given in COLUMN I with their respective examples in COLUMN II.

COLUMN I	COLUMN II
1. Writers	a) DNA demethylases
2. Erasers	b) Histone acetyltransferases
3. Readers	c) meCG-binding proteins
	d) Histone kinases
	e) Chromatin remodelers
	f) Histone deacetylases

#Question id: 9227

#Unit 9. Diversity of Life Forms

A land developer and several ecologists are discussing how a parcel of private land should be developed with housing while saving 20 hectares as natural habitat. The land developer suggests that the 20 hectares be divided into 20 separate 1-hectare areas, spread out across the area. The ecologists suggest that it would be better to have one intact parcel of 20 hectares on one side of the larger area. What is the significance of these different arrangements of the 20 hectares?

#Question id: 11433

#Unit 1. Molecules and their Interaction Relevant to Biology

An amino acid contains no ionizable group in its side chain (R). It is titrated from pH 0 to 14. Which of the following ionizable state is not observed during the entire titration in the pH range 0 - 14?

#Question id: 983

#Unit 1. Molecules and their Interaction Relevant to Biology

The pyrimidine ring system is shown below. What is the source of the C-2 during the de novo biosynthesis of pyrimidines?

#Question id: 3729

#Unit 3. Fundamental Processes

What is a Klenow fragment?

#Question id: 29448

#Unit 6. System Physiology – Plant

Plant genes expressed early, or in the absence of bacterial infection, are termed