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TLS Online TPP Program

#Question id: 623

Which of these statements about enzyme-catalyzed reactions is false?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. At saturating levels of substrate, the rate of an enzyme-catalyzed reaction is proportional to the enzyme concentration.

  2. If enough substrate is added, the normal Vmax of a reaction can be attained even in the presence of a competitive inhibitor.

  3. The rate of a reaction decreases steadily with time as substrate is depleted.

  4. The activation energy for the catalyzed reaction is the same as for the uncatalyzed reaction, but the equilibrium constant is more favorable in the enzyme-catalyzed reaction.

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TLS Online TPP Program

#Question id: 32715

#Unit 1. Molecules and their Interaction Relevant to Biology

Which model correctly represents the graph


 
TLS Online TPP Program

#Question id: 16965

#Unit 11. Evolution and Behavior

In an adaptive radiation, numerous related lineages arise in a relatively short time and evolve in many different directions as they adapt to different habitats or ways of life. Radiation, rather than directional trends, is perhaps the most common pattern of long-term evolution. Which statements is not true for adaptive radiation?
TLS Online TPP Program

#Question id: 3652

#Unit 3. Fundamental Processes

Alkylating agents are electrophilic chemicals which readily add alkyl groups to various positions on nucleic acids. A common example is:
TLS Online TPP Program

#Question id: 17670

#Unit 9. Diversity of Life Forms

The following are common to both charophytes and land plants except 
TLS Online TPP Program

#Question id: 3903

#Unit 3. Fundamental Processes

The type of RNA that is least stable in cells is __.