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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:

#Unit 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: 14964

#Unit 2. Cellular Organization

The resistance of the tubercle bacillus to various factors is probably due to its
TLS Online TPP Program

#Question id: 3916

#Unit 3. Fundamental Processes

Transcription termination
TLS Online TPP Program

#Question id: 4465

#Unit 3. Fundamental Processes

Main function of Nus proteins in transcription,
TLS Online TPP Program

#Question id: 23877

#Unit 13. Methods in Biology

Which of the following would be a reasonably efficient technique for confirming the diagnosis of CML?
TLS Online TPP Program

#Question id: 12100

#Unit 10. Ecological Principles

Prairie dogs once covered the expanses of the Great Plains. Their grazing made the grass more nutritious for the huge herds of bison, and a variety of snakes, raptors, and mammals   preyed on the rodents. In fact, the black- footed ferret (now endangered) specialized in prairie dog predation. Today, growing housing and agricultural developments have covered many prairie dog towns. Which of the following statements about prairie dogs is true?