MCQ
Humus is
- AA mixture of clay sand and loam
- BHeavy soil with mineral salts
- ✓Organic matter of colloidal size
- DLight soil with lime
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Reason : Interferons stimulate inflammation at the site of injury.
$(a)$ Euchromatin is loosely packed chromatin
$(b)$ Heterochromatin is transcriptionally active
$(c)$ Histone octomer is wrapped by negatively charged DNA in nucleosome
$(d)$ Histones are rich in lysine and arginine
$(e)$ A typical nucleosome contains $400\,bp$ of DNA helix
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