Two cards are drawn with replacement from a well shuffled deck of 52 cards. The mean and standard deviation for the number of aces are

Probability distribution table

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#Question id: 5253

#SCPH05 I Biotechnology

In a hypothetical situation, the genes for sex pilus construction and for tetracycline resistance are located together on the same plasmid within a particular bacterium. If this bacterium readily performs conjugation involving a copy of this plasmid, then the resultshould be

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#Question id: 3653

#SCPH05 I Biotechnology

Cyclobutane pyrimidine dimers are formed by -------------from adjacent pyrimidines on one strand by cyclization of the double-bonded C5 and C6carbon atoms of each base to give a cyclobutane ring.

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#Question id: 13055

#SCPH01 Biochemistry

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.

Which of the following will provide least specific amplification in qPCR?

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#Question id: 1048

#SCPH06 I Botany

A virion is composed of

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#Question id: 2282

#SCPH05 I Biotechnology

Which of the following organelles is found in plant cells but not in animal cells?