TLS Online TPP Program

#Question id: 11225


What happens if twice as many inhibitory postsynaptic potentials (IPSPs) as excitatory postsynaptic potentials (EPSPs) arrive in close proximity at a postsynaptic neuron?

#Unit 7. System Physiology – Animal
  1. A stronger action potential results.
  2. A weaker action potential results.
  3. No action potential results.
  4. Many action potentials result.
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TLS Online TPP Program

#Question id: 222

#Unit 1. Molecules and their Interaction Relevant to Biology

Which vitamin is shown below? 

TLS Online TPP Program

#Question id: 14886

#Unit 4. Cell Communication and Cell Signaling

Secondary lymphoid organ provide sites where lymphocytes encounter antigen, become activated, and undergo clonal expansion and differentiation into effector cells, include
a) spleen
b) lymph node
c) mucosa-associated lymphoid tissue
Which of the following are the effector cells of secondary lymphoid organ?

TLS Online TPP Program

#Question id: 30063

#Unit 7. System Physiology – Animal

During the action potential in SA node, a channel permeable to both Na+ and K+ is activated. Because this channel is activated following hyperpolarization, it is referred to as:
A. “h” channel B. “f” channel
C. “L” channel D. “T” channel
Which of the following represents correct combination?

TLS Online TPP Program

#Question id: 11844

#Unit 6. System Physiology – Plant

The following statements are made to describe the biosynthetic pathway of IAA;

a)  IPA pathway involves a deamination reaction to form IPA, followed by a decarboxylation reaction to form indole-3-acetaldehyde (IAld) and then oxidized to IAA by a specific dehydrogenase

b) IAN pathway is similar to the IPA pathway, except that the order of the deamination and decarboxylation reactions is reversed, and different enzymes are involved

c) IAM pathway  involves the two enzymes  tryptophan monooxygenase and IAM hydrolase

d) In the IAN pathway, tryptophan is first converted to indole-3-acetaldoxime and then to indole-3-acetonitrile. The enzyme that converts IAN to IAA is called nitrilase

Which of the following is the correct  statements  of about the biosynthesis of  IAA?

TLS Online TPP Program

#Question id: 2862

#Unit 2. Cellular Organization

What is the result of regulatory mutation in given lac operon in merodiploids,