Expression of rRNA genes is controlled by

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#Question id: 3434

#Unit 11. Evolution and Behavior

type of learning that can occur only during a brief period of early life and results in a behavior that is difficult to modify through later experiences is called

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#Question id: 2976

#Unit 2. Cellular Organization

Match the following Regulators with its functions.

Column I	Column II
A.  Wee1 kinase	i. Degradation of phosphorylated Sic1 or p27KIP1
B. Cdc25A phosphatase	ii. Induces degradation of B-type cyclins
C. APC/CCdc20	iii. Activates vertebrate S phase CDKs
D. SCF	iv. Inhibits CDKs

Which of the following is correct?

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#Question id: 18922

#Unit 13. Methods in Biology

For which of the following plasmids purification of a recombinant molecule from the transformed cell can be difficult?

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#Question id: 1945

#Unit 4. Cell Communication and Cell Signaling

Neonatal myasthenia gravis is thought to be caused by:

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#Question id: 13065

#Unit 13. Methods in Biology

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.

Agglutination of antigens by utilising specific antibodies can only occur, if