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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:

#XL - Q Biochemistry

  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: 19623

#XL - P Chemistry

What is the heat of reaction for ethyl acetate hydrolysis?
TLS Online TPP Program

#Question id: 13214

#XL - R Botany

The stomata will open less or even remain closed on a sunny morning when
TLS Online TPP Program

#Question id: 8703

#XL - T Zoology

In a comparison of birds and mammals, having four limbs is ________.
TLS Online TPP Program

#Question id: 4963

#XL - S Microbiology

Which free-living cells were the earliest contributors to the formation of Earthʹs oxidizing atmosphere?
TLS Online TPP Program

#Question id: 518

#XL - S Microbiology

Transfer of the phosphoryl group from PEP to ADP is an example of