A transcription unit in DNA is defined primarily by the three regions in DNA and these are with respect to upstream and down stream end; (1) Repressor, Operator gene, Structural gene (2) Structural gene, Transposons, Operator gene (3) Inducer, Repressor, Structural ...Read more

The lactose present in the growth medium of bacteria is transported to the cell by the action of (1) Beta-galactosidase (2) Acetylase (3) Permease (4) Polymerase

Auxin is used by gardeners to prepare weed-free lawns. But no damage is caused to grass as auxin (1) promotes apical dominance. (2) promotes abscission of mature leaves only. (3) does not affect mature monocotyledonous plants. (4) can help in cell ...Read more