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TLS Online TPP Program

#Question id: 2070

The sodium-potassium pump is called an electrogenic pump because it:

#Section 3: Genetics, Cellular and Molecular Biology

  1. pumps equal quantities of Na+ and K+ across the membrane in opposite directions

  2. is used to drive the transport of glucose against a concentration gradient

  3. decreases the voltage difference across the membrane

  4. generates voltage across the membrane

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TLS Online TPP Program

#Question id: 1873

#Section 2: General Biology

Mutations in the gene encoding which of the following most commonly results in severe combined immunodeficiency (SCID)?
TLS Online TPP Program

#Question id: 150

#Section 2: General Biology

How do the pKa values of an ionizable side chain compare when the amino acid is free versus when it is in a polypeptide chain?
TLS Online TPP Program

#Question id: 74

#Section 2: General Biology

The enthalpy and entropy of the initial and final states of a reacting system are shown in the table. Calculate the change in free energy for the reaction when the temperature is 4°C.
TLS Online TPP Program

#Question id: 1676

#Section 2: General Biology

NK cells lack receptors with:
TLS Online TPP Program

#Question id: 1973

#Section 2: General Biology

Clonal selection is an explanation for how