Testosterone is an example of a chemical signal that affects the very cells that synthesize it, the neighboring cells in the testis, along with distant cells outside the gonads. Thus, testosterone is an example of ________.

 I) an autocrine signal

 II) a paracrine signal

 III) an endocrine signal

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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: 27718

#Research Methodology

._______ are the basic building blocks of qualitative data.

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#Question id: 1700

#SCPH01 Biochemistry

Which of the following statements is TRUE of iNKT cells?

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#Question id: 678

#SCPH05 I Biotechnology

Which is not true about β-sheets?

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#Question id: 971

#SCPH28 | Zoology

What is the source of the nitrogen atoms 3 and 9 during the de novo biosynthesis of purines?