TLS Online TPP Program

#Question id: 2347


Diffusion of molecules across biological membranes that requires channels is called

#Unit 2. Cellular Organization
  1. active transport.

  2. the sodium-potassium pump.

  3. facilitated diffusion.

  4. osmosis.

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TLS Online TPP Program

#Question id: 401

#Unit 1. Molecules and their Interaction Relevant to Biology

.Which of the following graphs describes the relationship between [H3O+] and pH?

TLS Online TPP Program

#Question id: 31352

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following graph shows correct relationship

TLS Online TPP Program

#Question id: 31365

#Unit 1. Molecules and their Interaction Relevant to Biology

To purify ‘A’ from a mixture of these four proteins in a single step, using ion-exchange chromatography, what combination of buffer pH and ion-exchange resin would you select?


TLS Online TPP Program

#Question id: 402

#Unit 1. Molecules and their Interaction Relevant to Biology

If the DG'° of the reaction A -> B is –40 kJ/mol, under standard conditions the reaction:

TLS Online TPP Program

#Question id: 403

#Unit 1. Molecules and their Interaction Relevant to Biology

For the reaction A -> B, DG'° = –60 kJ/mol.  The reaction is started with 10 mmol of A; no B is initially present.  After 24 hours, analysis reveals the presence of 2 mmol of B, 8 mmol of A. Which is the most likely explanation?

TLS Online TPP Program

#Question id: 404

#Unit 1. Molecules and their Interaction Relevant to Biology

When a mixture of 3-phosphoglycerate and 2-phosphoglycerate is incubated at 25 °C with phosphoglycerate mutase until equilibrium is reached, the final mixture contains six times as much 2-phosphoglycerate as 3-phosphoglycerate.  Which one of the following statements is most nearly correct, when applied to the reaction as written?  (R = 8.315 J/mol·K; T = 298 K)  3-Phosphoglycerate -> 2-phosphoglycerate