Examples of G protein–coupled receptors include

a. rhodopsin receptor.             b. β-adrenergic receptor.

c. insulin receptor.                   d. acetylcholine receptor.

TLS Online TPP Program

#Question id: 31416

#Unit 4. Cell Communication and Cell Signaling

The abnormal activation of the PI 3-kinase/Akt/mTOR pathway, which normally occurs early in the process of tumor progression, helps to explain the excessive rate of glycolysis that is observed in tumor cells, known as: 

TLS Online TPP Program

#Question id: 31417

#Unit 2. Cellular Organization

Put these events in the correct temporal order: 

a. End plate potential (EPP)

b. Action potential in muscle fiber

c. ACh release from presynaptic terminal

d. MEPP

e. Opening ligand-gated ion channels

f. Opening Ca²⁺ channels in presynaptic terminal

g. Binding of ACh to nicotinic receptors,

h. Action potential in nerve fiber

TLS Online TPP Program

#Question id: 32132

#Unit 1. Molecules and their Interaction Relevant to Biology

For guanine, the pKa value is 

TLS Online TPP Program

#Question id: 32133

#Unit 1. Molecules and their Interaction Relevant to Biology

The structure shown here is 

TLS Online TPP Program

#Question id: 32134

#Unit 1. Molecules and their Interaction Relevant to Biology

In mammals, which nucleotide act as local hormone, and as a neuromodulator

TLS Online TPP Program

#Question id: 32135

#Unit 1. Molecules and their Interaction Relevant to Biology

The net charge on a nucleoside monophosphate is