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TLS Online TPP Program

#Question id: 1033

 A research lab is trying to produce new antibiotics. They come up with drugs that detach the hydrophilic heads from the phospholipids in plasma membranes. This drug

#SCPH28 | Zoology

  1. would be highly toxic and completely useless for human beings-we also have plasma membranes with hydrophilic head groups!

  2. would be highly toxic only to bacteria, making it an excellent drug to develop and test further. Humans have a different phospholipid structure in their cell plasma membranes than bacteria.

  3. would generally not be toxic enough to damage Gram-negative bacteria, as their plasma membranes lie under a thick layer of peptidoglycan.

  4. would be highly toxic for human beings, but might be useful as a topical antibiotic skin cream. The top layer of skin cells is dead anyway, so it wouldn't matter if this damaged those cells. It could NOT be taken internally, though, by human beings. 

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TLS Online TPP Program

#Question id: 2959

#SCPH28 | Zoology

During which of the following mitotic phases are chromosomes dispersed the most?
TLS Online TPP Program

#Question id: 17816

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

CATH database classifies protein domains. CATH stands for
TLS Online TPP Program

#Question id: 4908

#SCPH06 I Botany

Shell coiling of the snail is maternal effect phenotype control by S gene, where S Dextral is dominant over s sinistral. If snail sinistral coiled shell, which of the following statement is true
TLS Online TPP Program

#Question id: 10165

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

In the C4 photosynthetic carbon cycle involves uptake of CO2 in the form of HCO3-, the acceptor of the HCO3- is
TLS Online TPP Program

#Question id: 94

#SCPH28 | Zoology

A monosaccharide whose anomeric carbon atom has a glycosidic bond to an alcohol, amine or thiol is a ________.