Practice Questions

TLS Online TPP Program

#Question id: 548

Which one of the following statements is true of enzyme catalysts?

#XL - R Botany

Their catalytic activity is independent of pH.
They are generally equally active on D and L isomers of a given substrate.
They can increase the equilibrium constant for a given reaction by a thousand fold or more.
They can increase the reaction rate for a given reaction by a thousand fold or more.

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TLS Online TPP Program

#Question id: 1246

#XL - Q Biochemistry

An SH2-containing protein contains a mutation that changes its binding pocket such that tyrosine and phosphotyrosine bind with equal affinity. As a result, MEK activity:

TLS Online TPP Program

#Question id: 1363

#XL - Q Biochemistry

Which of the following statements best describes the difference between low-affinity integrins and high-affinity integrins?

TLS Online TPP Program

#Question id: 1389

#XL - S Microbiology

Why has C. elegans proven to be a useful model for understanding apoptosis?

TLS Online TPP Program

#Question id: 1539

#XL - S Microbiology

Regulatory T cell (TREG) have identified by the presence of