Practice Questions

A mother of blood type A+ who has always been perfectly healthy just delivered her second child. The father is of blood group O−. Knowing that the child is of blood group O− (O, Rh−), what would you expect to find in this child?

TLS Online TPP Program

#Question id: 10413

#Unit 1. Structure and Function of Biomolecules

Following are certain statements are related to the effect of red and far-red light;

a) under a dense canopy much of the red light is absorbed by plant pigments, resulting in transmittance of mostly far-red light

b) Pr (red) has highest photon flux at 680 nm while Pfr (far-red) has highest photon flux at 730nm

c) Pfr far-red light–absorbing form, which is considered to be the physiologically active form of phytochrome

d) R:FR ratio is strongly affected by the presence of a canopy because chlorophyll absorbs far-red but not red light

Which one of the combinations of above statements is incorrect?

TLS Online TPP Program

#Question id: 11840

#Unit 1. Structure and Function of Biomolecules

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