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#Question id: 2066


Which of the following statements describes a characteristic feature of a carrier protein in a plasma membrane?

#Section 2: General Biology
  1. It exhibits specificity for a particular type of molecule.

  2. It requires the expenditure of cellular energy to function.

  3. It works against diffusion.

  4. It has no hydrophobic regions.


Answer:- Option(s): 1


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TLS Online TPP Program

#Question id: 563

#Section 2: General Biology

Both water and glucose share an —OH that can serve as a substrate for a reaction with the terminal phosphate of ATP catalyzed by hexokinase.  Glucose, however, is about a million times more reactive as a substrate than water.  The best explanation is that:

TLS Online TPP Program

#Question id: 564

#Section 2: General Biology

A good transition-state analog:

TLS Online TPP Program

#Question id: 565

#Section 2: General Biology

A transition-state analog:

TLS Online TPP Program

#Question id: 566

#Section 2: General Biology

The role of the metal ion (Mg2+) in catalysis by enolase is to

TLS Online TPP Program

#Question id: 567

#Section 2: General Biology

Penicillin and related drugs inhibit the enzyme; this enzyme is produced by 

TLS Online TPP Program

#Question id: 568

#Section 2: General Biology

Which of the following statements about allosteric control of enzymatic activity is false?

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