Auxin-induced proton extrusion performs

a. Acidification the cell wall 

b. Alkalisation of the call wall

c. Increases cell extension

d. Decrease in cell extension

Which of the following is correct

TLS Online TPP Program

#Question id: 16955

#Unit 4. Cell Communication and Cell Signaling

Stage thymocytes express neither CD4 nor CD8, markers associated with mature T cells. They are therefore called double negative (DN) cells. DN cells first travel to the region under the thymic capsule, a region referred to as the ________, where they proliferate and begin to generate their T-cell receptors. Thymocytes that successfully express TCRs begin to express both CD4 and CD8, becoming double positive (DP) cells, and populate the cortex, the site where most (85% or more) immature T cells are found.

TLS Online TPP Program

#Question id: 635

#Unit 1. Molecules and their Interaction Relevant to Biology

The enymatic rate constant (kcat/Km) of orotidine 5ʹ-phosphate decarboxylase is 6 x 10⁷ M^-1s^-1 and the nonenzymatic rate constant (kn) is 3 x 10^-16 s^-1.  What is the value of the enzymeʹs catalytic proficiency?

TLS Online TPP Program

#Question id: 6608

#General Aptitude

What is the next number in the sequence ? 12,35,81,173,357,.... 

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#Question id: 660

#Unit 1. Molecules and their Interaction Relevant to Biology

Computers are used to advance the understanding of three dimensional protein structure by

TLS Online TPP Program

#Question id: 32330

#Unit 1. Molecules and their Interaction Relevant to Biology

The parietal cells of the stomach lining contain membrane “pumps” that transport hydrogen ions from the cytosol (pH 7.0) into the stomach, contributing to the acidity of gastric juice (pH 1.0). Calculate the free energy required to transport 1 mol of hydrogen ions through these pumps. (Hint: see Chapter 11.) Assume a temperature of 37 °C.