In positive control of several sugar metabolism-related operons, the cAMP receptor protein (CRP) binds to DNA to stimulate transcription. Which of the following environmental conditions causes an increase in CRP activity in stimulating transcription?

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#Question id: 13062

#SCPH06 I Botany

Precision will be reduced, but yield will be increased

Optimisation of a PCR reaction is often a compromise between the competing demands for precision, efficiency and yield. Although the specific effects may vary, generally, increasing the annealing temperature will increase non-specific primer binding and reduce precision. Increasing the length of the elongation phase will reduce the proportion of incomplete newly-synthesised strands and therefore increase yield. In this case, the potential effect on efficiency is unclear. Increasing the elongation phase would increase the reaction time, but the time taken to ramp down to a lower annealing temperature would be reduced.

A restriction enzyme cleaves a circular plasmid vector to produce fragments : 1kb, 0.3kb, 2kb, 1kb and 0.3kb. How many bands will be visible on agarose gel?

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#Question id: 764

#SCPH05 I Biotechnology

Which of the following is NOT correct about tRNA?

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#Question id: 5062

#SCPH06 I Botany

Which of the signaling pathway is represent in this figure?

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#Question id: 15489

#SCPH01 Biochemistry

Glyphosate resistance,  Aromatic amino acid are all produced by targeting which pathway

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#Question id: 427

#SCPH28 | Zoology

The degradation of which class of biochemicals does not significantly contribute to the release of energy to cells?