Some statement is given related to cytokinin

a. iP and tZ are active, and their derivatives are abundant

b. iP and tZ are inactive, and they are not abundant

c. iP and tZ are susceptible to degradation by CK oxidase (CKX). 

d. all cZ‐type CKs are derived from tRNA degradation in cZ‐abundant plant species

Which of the following is INCORRECT

TLS Online TPP Program

#Question id: 28930

#Unit 4. Cell Communication and Cell Signaling

Hedgehog (Hh) presence causes__ 

a) binds to Smo, causing Smo to be endocytosed from the cell surface and degraded

b) binds to Ptc, causing Ptc to be endocytosed from the cell surface and degraded

c) degraded Ptc and relieving the inhibition of Smo

d) degraded Smo and relieving the inhibition of Ptc

TLS Online TPP Program

#Question id: 28931

#Unit 4. Cell Communication and Cell Signaling

Which of the following activity dissociates Fu-Cos2-Ci complex?

TLS Online TPP Program

#Question id: 31014

#Unit 4. Cell Communication and Cell Signaling

If the insulin concentration rises fivefold to 2.5 × 10⁻¹¹ M, as it does after a meal, and the Kd for binding of insulin to its receptor on liver cells, 1.4 × 10⁻¹⁰ M (0.14 nM). What fraction of insulin receptors with bound insulin? 

TLS Online TPP Program

#Question id: 31015

#Unit 4. Cell Communication and Cell Signaling

A ligand binds two different receptors with a Kd value of 10⁻⁷ M for receptor 1 and a Kd value of 10⁻⁹ M for receptor 2. For which receptor does the ligand show the greater affinity?

TLS Online TPP Program

#Question id: 31016

#Unit 4. Cell Communication and Cell Signaling

Epinephrine binding to its receptor stimulates:

TLS Online TPP Program

#Question id: 31017

#Unit 4. Cell Communication and Cell Signaling

When the signaling molecules are synthesized and secreted by signaling cells, transported through the circulatory system and finally act on target cells distant from their site of synthesis, called as: