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TLS Online TPP Program

#Question id: 11125

In chemical synapses that involve a so-called second messenger, typically a G-protein linked to the postsynaptic receptor is activated when neurotransmitter binds to that receptor. Which of the following represents an activity performed by the activated second messenger?

#SCPH28 | Zoology
  1. Closure of a membrane channel for sodium or potassium
  2. Activation of cyclic AMP or cyclic GMP
  3. Inactivation of enzymes that initiate biochemical reactions in the postsynaptic neuron
  4. Inactivation of gene transcription in the postsynaptic neuron
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TLS Online TPP Program

#Question id: 3896

#SCPH01 Biochemistry

Which one of the following is not involved in steroid hormone action?
TLS Online TPP Program

#Question id: 14107

#SCPH05 I Biotechnology

Direct submission to GenBank are made using 
TLS Online TPP Program

#Question id: 1613

#I Life Science/ Life Sciences Group – I-V

Complement component C3 is cleaved by:
TLS Online TPP Program

#Question id: 12565

#SCPH06 I Botany

If we say a species is endemic to a certain area, we mean that
TLS Online TPP Program

#Question id: 7306

#SCPH01 Biochemistry

A plant scientist was hired by a greenhouse operator to devise a way to force iris plants to bloom in the short days of winter. Iris normally blooms as a long-day (short-night) plant. Which of the following has the best chance of creating iris blooms in winter?