Which of the following events occur when E. coli is starved for tryptophan?

I.  The ribosome translates leader peptide completely

II. Transcription reads through attenuator into trp EDCBA

III. Tryptophanyl tRNA is not formed

IV. A stem loop structure involving regions 3 and 4 is formed at attenuator site

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#Question id: 10409

#SCPH06 I Botany

Three main classes of photoreceptors mediate the effects of UV-A/blue light:

a) the cryptochromes,

b) the phototropins,

c) the phytochrome and

d) the ZEITLUPE (ZTL)

Function of these photoreceptors are-

i) that can promote plant photomorphogenesis

ii) plays roles in day length perception and circadian rhythms

iii) regulate chloroplast movements, and stomatal opening

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#Question id: 4331

#SCPH05 I Biotechnology

In eukaryotic cells, transcription cannot begin until

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#Question id: 14302

#SCPH05 I Biotechnology

Pseudomonas sp. has a mass doubling time of 2.4 h when grown on acetate. The saturation constant using this substrate is 1.3 g/l (which is unusually high), and cell yield on acetate is 0.46 g cell/g acetate. If we operate a chemostat on a feed stream containing 38 g/l acetate, find the Substrate concentration when the dilution rate is 0.8Dmax?

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#Question id: 11138

#I Life Science/ Life Sciences Group – I-V

The point of connection between two communicating neurons is called the ________.

TLS Online TPP Program

#Question id: 1096

#SCPH01 Biochemistry

Which of the following processes generally requires protein phosphorylation?