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: 19224

#Unit 12. Applied Biology

Transformation efficiency is usually low, plants have been successfully transformed with large DNA fragments ranging from

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#Question id: 8951

#Unit 9. Diversity of Life Forms

An animal that swims rapidly in search of prey that it captures using visual senses concentrated at its anterior end is likely to be

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#Question id: 16124

#Unit 7. System Physiology – Animal

Thermoreceptors are:

a) activated only by severe cold or severe hot

b) located on the superficial layers of the skin

c) a subtype of nociceptors

d) on dendritic endings of A delta fibres and C fibres

which of following combination is correct?

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#Question id: 12021

#Unit 7. System Physiology – Animal

Nutrient-rich blood from the intestine is carried through the ________ to the liver.

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#Question id: 23026

#Unit 12. Applied Biology

A process using microbes to convert toxic industrial wastes to less toxic or non-toxic compounds is