The third base of each codon plays a lesser role in specifying an amino acid than the first two.

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#Id: 4710

#Unit 13. Methods in Biology

The presence of several conjugated double bonds in organic molecules results in an extended p-system of electrons which lowers the energy of the p* orbital through electron delocalisation.

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#Id: 10052

#Unit 4. Cell Communication and Cell Signaling

Second cleavage of Notch occurs within membrane-spanning region & catalyzed by γ-secretase

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#Id: 2053

#Unit 8. Inheritance Biology

Homoplasmy- All mutated mitochondria

Heteroplasmy- wild type + mutant mitochondria

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#Id: 2029

#Unit 8. Inheritance Biology

F⁺ Present as separate circular plasmid

F⁻ Absent

Hfr Present, integrated into bacterial chromosome

F′ Present as separate circular plasmid, carrying some bacterial genes

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#Id: 852

#Unit 2. Cellular Organization

Xanthomonas oryzae secretes a highly conserved sulfated peptide called Ax21, which mediates quorum sensing by controlling Xanthomonas motility, biofilm formation, and virulence.