The phosphate transport system in bacteria imports phosphate into the cell even when the concentration of phosphate outside the cell is much lower than the cytoplasmic phosphate concentration. Phosphate import depends on a pH gradient across the membrane—more acidic outside the cell than inside the cell. In this bacterial cell, phosphate transport is an example of:

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#Question id: 433

#SCPH01 Biochemistry

Fatty acid synthesis occurs in the ________, while fatty acid breakdown occurs in the

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#Question id: 18593

#SCPH06 I Botany

Some important events in the history of life on Earth are given below.

A. First dinosaurs appeared.

B. First reptiles appeared.

C. First insect fossils appeared.

D. First toothed birds appearance.

E. First wingless insect appeared.

F. Mammals like reptile arise

Match the above with the geological time periods and choose the correct combination,

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#Question id: 1289

#SCPH06 I Botany

Polymerization of collagen into large collagen fibers occurs:

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#Question id: 15638

#SCPH28 | Zoology

You have isolated two mutations that show decreased expression of the Lac operon. However, unlike like the promoter mutations, these mutations don’t respond to the inducer IPTG. These mutations, designated Lac3– and Lac4–, are evaluated for the quantity of ß-galactosidase and permease activity expressed with or without IPTG:

 

Mapping experiments reveal that Lac3– and Lac4– are different short deletions located in the region before the start of the LacZ gene. Given the data shown above suggest which genetic element(s) in addition to part of the promoter has been deleted in each mutant. 

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#Question id: 15863

#SCPH05 I Biotechnology

what is protoplast?