A bacterial histidine mutant was plated on minimal medium and a single colony grew. You decide to sequence the histidine biosynthetic gene of the revertant and discover that the original mutation is still present.  This colony must have been able grow due to a

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#Question id: 15480

#XL - S Microbiology

Feedback repression involves the turning “off” of enzyme synthesis when the amount of the product has been made in sufficient quantities. The end product of the pathway acts as

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#Question id: 59

#XL - Q Biochemistry

Nitrogen (N) normally forms three covalent bonds with a valence of five. However, ammonium has four covalent bonds, each to a different hydrogen (H) atom (H has a valence of one). What do you predict to be the charge on ammonium?

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#Question id: 1043

#XL - T Zoology

Nematodes

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#Question id: 31418

#XL - S Microbiology

Which nutritional group does a bacterium belong to if it obtains energy from a chemical source, with 𝐶𝑂2 as the principal carbon source, and an inorganic electron donor?

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#Question id: 12688

#General Aptitude

The perimeter of five squares are 24 cm, 32 cm, 40 cm, 76 cm and 80 cm respectively. The perimeter of another square equal in area to sum of the areas of these squares is :