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TLS Online TPP Program

#Question id: 549

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

#SCPH28 | Zoology

  1. They bind to substrates, but are never covalently attached to substrate or product.

  2. They increase the equilibrium constant for a reaction, thus favoring product formation.

  3. They increase the stability of the product of a desired reaction by allowing ionizations, resonance, and isomerizations not normally available to substrates.

  4. They lower the activation energy for the conversion of substrate to product.

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TLS Online TPP Program

#Question id: 2991

#SCPH06 I Botany

Early observations of a cultured cell line indicated that the cells did not exhibit either density-dependent inhibition or anchorage dependence. What do these observations suggest about this cell line?
TLS Online TPP Program

#Question id: 256

#SCPH12 I Genetics

The tetranucleotide AGTC (in DNA) has a free hydroxyl group on
TLS Online TPP Program

#Question id: 1099

#SCPH06 I Botany

How does the toxin of Vibrio cholerae cause profuse diarrhea?
TLS Online TPP Program

#Question id: 5031

#SCPH28 | Zoology

Which era is known as the ʺage of reptilesʺ?
TLS Online TPP Program

#Question id: 11458

#SCPH28 | Zoology

A person able to hear only low-frequency sounds would probably have which of the following structural problems in the ear?