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: 24536

#Unit 11. Evolution and Behavior

If the given proportionate contribution of genotypes to the population is p2  WFF =0.04,  2pqWFS  =0.16 , 

q2 WSS = 0.16, then what will be the Relative genotypic frequency after selection of heterozygous ;

TLS Online TPP Program

#Question id: 12606

#Unit 10. Ecological Principles

A porcupine eats 3,000 J of plant material. 1,600 J is indigestible and is eliminated as feces. 1,300 J are used in cellular respiration. What is the approximate production efficiency of this animal?

TLS Online TPP Program

#Question id: 15952

#Unit 12. Applied Biology

Somatic embryogenesis defined as;

I) SE induction occurs on high auxin

II) SE development takes place on a low auxin or GR-free medium

TLS Online TPP Program

#Question id: 12234

#Unit 10. Ecological Principles

All of the following have been used by plants to avoid being eaten except

TLS Online TPP Program

#Question id: 12972

#Unit 10. Ecological Principles

Under  some  circumstances a  population  can  split  into  two  or  more  species  without  the  existence of  geographic barriers. All of the following genetically determined behaviours could provide conditions leading to speciation EXCEPT