An enzyme has a Vmax of 50 micromol product formed (minute x mg protein)-1 and a Km of 10 microM for the substrate. When a reaction mixture contains the enzyme and 5 microM substrate, which of the following percentages of the maximum velocity will be closest to the initial reaction rate?

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#Question id: 5261

#SCPH06 I Botany

Which of these statements about prokaryotes is correct?

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#Question id: 22943

#SCPH28 | Zoology

FLOWERING D (FD) that is expressed in the meristem, belongs to which, transcription factor family?

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#Question id: 11957

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

Because the foods eaten by animals are often composed largely of macromolecules, animals need to have mechanisms for ________.

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#Question id: 2636

#SCPH01 Biochemistry

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: 3639

#SCPH28 | Zoology

Replication of a bacterial chromosome normally starts at a fixed point called: