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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: 20125

#XL - P Chemistry

Which of the following does not exhibit zero entropy at absolute zero
TLS Online TPP Program

#Question id: 389

#XL - S Microbiology

A weak acid HA has a pKa of 5.0.  If 1.0 mol of this acid and 0.1 mol of NaOH were dissolved in one liter of water, what would the final pH be?
TLS Online TPP Program

#Question id: 11592

#XL - R Botany

Gibberellin biosynthesis precursor is____
TLS Online TPP Program

#Question id: 1718

#XL - Q Biochemistry

When Langerhans' cells differentiate into fully mature dendritic cells (DCs) they:
TLS Online TPP Program

#Question id: 2997

#XL - S Microbiology

Composed of population of cell that at the same stage of their cell cycle