TLS Online TPP Program

#Question id: 2618


The three genes (lacZ, lacY, and lacA) are transcribed as a single mRNA from the promoter, these genes are expressed at high levels only when

#Part-A Aptitude & General Biotechnology
  1. Lactose is available

  2. Glucose, the preferred energy source is available

  3. Three regulatory proteins are involved.

  4. The Lac repressor is encoded by the lacI gene, which is located near the CAP Site.

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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.

TLS Online TPP Program

#Question id: 11190

#Part-B Specialized Branches in Biotechnology

For a neuron with an initial membrane potential at -70 mV, an increase in the movement of potassium ions out of that neuron's cytoplasm would result in the ________.