T-cell dependent response requires a signal is provided by an activated T cell, which binds to the B cell through,

a) lipopolysaccharide moiety

b) its antigen receptor 

c) A separate interaction between CD40L on the B cell and CD40 (CD154) on the activated TH cell

d) A separate interaction between CD40 on the B cell and CD40L (CD154) on the activated TH cell

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#Question id: 367

#Unit 1. Molecules and their Interaction Relevant to Biology

1.0 × 10^−4 mole of H+ (as HCl) is added to 1.0 liter of pure water. Determine the final pH of the solution.

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#Question id: 23698

#Unit 13. Methods in Biology

A student wishes to clone a sequence of DNA of ~200 kb. Which vector would be appropriate?

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#Question id: 3908

#Unit 3. Fundamental Processes

Which of the following is correct?

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#Question id: 11840

#Unit 6. System Physiology – Plant

During an ethylene signalling pathway, what will have done  inside cytosol and nucleus . Given below some prediction about presence and absence of ethylene in column B match with column A

COLUMN A	COLUMN B
I-  In the presence of ethylene	a)  ETR1 signaling is repressed and CTR1 is inactive
II- In the absence of ethylene	b)  ETR1 activate CTR1, a Ser/Thr kinase
	c)  CTR1 phosphorylates the C-terminal domain of EIN2
	d)  The nonphosphorylated C terminus of EIN2 is cleaved by a protease
	e)  Phosphorylation of EIN2 inhibits proteolytic cleavage
	f)  EIN3 transcription factors are ubiquitinated and degraded in the nucleus by the 26S proteasome
	g)  EIN3 initiates a transcriptional cascade by activating expression of ethylene-responsive genes, including ERF1 transcription factor, leading to ethylene responses

 

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#Question id: 26812

#Unit 8. Inheritance Biology

In an individual heterozygous, the abnormal chromosome loops out during chromosome pairing in prophase I, in which condition?