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TLS Online TPP Program

#Id: 983

Nodal protein establishes left-right polarity, By activating Pitx2 on the left side

#Unit 5. Developmental Biology #AMPHIBIA #Part B Pointers
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TLS Online TPP Program

#Id: 6226

#Unit 12. Applied Biology

The genomes of all retroviruses contain the three genes gag, pol and env.

For sustainable expression of a trangene in the successive generation of a cell line in culture, the ideal gene transfer can be obtained using 
 lentiviral vector 
adenoviral vector 
 plasmid DNA containing the transgene 
only transgenic DNA
TLS Online TPP Program

#Id: 7305

#Unit 12. Applied Biology

Use of biological organisms, such as, bacteria, fungi (usually), and plants to reduce or eliminate toxic pollutants from contaminated sites by degradation or assimilation in the atmosphere is called bioremediation. 
TLS Online TPP Program

#Id: 7306

#Unit 12. Applied Biology

Microbial leaching of copper with the common copper ore CuS, in which copper exists as Cu2+   Acidophillus ferrooxidans oxidizes the sulfide in CuS to SO42, releasing Cu2+.
TLS Online TPP Program

#Id: 7307

#Unit 12. Applied Biology
TLS Online TPP Program

#Id: 7308

#Unit 12. Applied Biology

In uranium leaching, Acidophillus ferrooxidans oxidizes U4+ to U6+ with O2 as an electron acceptor. 
However, Uranium leaching depends more on the abiotic oxidation of U4+  by Fe3+ with A. ferrooxidans contributing to the process mainly through the reoxidation of Fe2+ to Fe+3, as in copper leaching.
TLS Online TPP Program

#Id: 7309

#Unit 12. Applied Biology

The major form of Hg in the atmosphere is elemental mercury (Hg0 ), which is volatile and is oxidized to mercuric ion (Hg2+) photochemically. Most mercury thus enters aquatic environments as Hg2+.