TLS Online TPP Program

#Question id: 15177


Several mechanisms in alkalophiles for the maintenance of a neutral cytoplasmic pH have been proposed. The plasma membrane may be

#Part-B Specialized Branches in Biotechnology
  1. Relatively impermeable to protons 
  2. Exchange potassium for protons using an antiport transport system
  3. Exchanging internal sodium ions for external protons
  4. All
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TLS Online TPP Program

#Question id: 11150

#Part-B Specialized Branches in Biotechnology

Use the information in the table to answer the question.


Calculate the equilibrium potential for potassium. Assume a temperature of 37°C.

TLS Online TPP Program

#Question id: 11185

#Part-B Specialized Branches in Biotechnology

Use the information in the table to answer the question. Calculate the equilibrium potential for sodium. Assume a temperature of 37°C.

 

TLS Online TPP Program

#Question id: 11186

#Part-B Specialized Branches in Biotechnology

Refer to the following graph of an action potential to answer the question. The membrane potential is closest to the equilibrium potential for potassium at label ________.

TLS Online TPP Program

#Question id: 11187

#Part-B Specialized Branches in Biotechnology

Refer to the following graph of an action potential to answer the question.



The membrane's permeability to sodium ions is greatest at label ________.

TLS Online TPP Program

#Question id: 11188

#Part-B Specialized Branches in Biotechnology

Refer to the following graph of an action potential to answer the question.

The minimum graded depolarization needed to operate the voltage-gated sodium and potassium channels is indicated by the label ________.

TLS Online TPP Program

#Question id: 11189

#Part-B Specialized Branches in Biotechnology

Refer to the following graph of an action potential to answer the question.

At label ________, the cell is not hyperpolarized; however, repolarization is in progress, as the sodium channels are inactivated or becoming inactivated, and many potassium channels have opened.