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TLS Online TPP Program

#Question id: 561

Enzyme X exhibits maximum activity at pH = 6.9.  X shows a fairly sharp decrease in its activity when the pH goes much lower than 6.4.  One likely interpretation of this pH activity is that:

#1. Molecules and their Interaction Relevant to Biology

  1. a Glu residue on the enzyme is involved in the reaction.

  2. a His residue on the enzyme is involved in the reaction.

  3. the enzyme has a metallic cofactor.

  4. the enzyme is found in gastric secretions

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TLS Online TPP Program

#Question id: 5548

#5. Developmental Biology

Vertebrate lungs are derived from
TLS Online TPP Program

#Question id: 19343

#12. Applied Biology

The Russian doll model and parchment model are two types of models used to describe the structure of ________carbon nanotube?
TLS Online TPP Program

#Question id: 23509

#Aptitude

Tamilnadu coastal belt has drinking water shortage due to:
TLS Online TPP Program

#Question id: 562

#1. Molecules and their Interaction Relevant to Biology

Phenyl-methane-sulfonyl-fluoride (PMSF) inactivates serine proteases by binding covalently to the catalytic serine residue at the active site; this enzyme-inhibitor bond is not cleaved by the enzyme.  This is an example of what kind of inhibition?
TLS Online TPP Program

#Question id: 11144

#7. System Physiology – Animal

The membrane potential in which there is no net movement of the ion across the membrane is called the ________.