TLS Online TPP Program

#Question id: 11849


According to chemiosmotic model for polar auxin transport, auxin _____A_______is driven by the______B________ across the plasma membrane, while auxin ___C_____is driven by the_________D_________

#Unit 6. System Physiology – Plant
  1. A-efflux,  B-proton motive force (∆E + ∆pH),  C-infflux,  D-membrane potential, ∆E
  2. A-influx,  B-proton motive force (∆E + ∆pH),  C-efflux,  D-membrane potential, ∆E
  3. A-influx,  B-membrane potential, ∆E,  C-efflux,  D-proton motive force (∆E+∆pH)
  4. A-removal,  B-membrane potential, ∆E,  C-uptake,  D-proton motive force (∆E+∆pH)
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TLS Online TPP Program

#Question id: 339

#Unit 1. Molecules and their Interaction Relevant to Biology

The edges of each base pair are exposed in the major and minor grooves, creating a pattern of hydrogen-bond donors and acceptors and of hydrophobic groups (allowing for Vander Waals interactions) that identifies the base pair. The edge of an C : G base pair displays the following chemical groups in the following order in the major groove:

TLS Online TPP Program

#Question id: 338

#Unit 1. Molecules and their Interaction Relevant to Biology

What is the difference between covalent bonds and ionic bonds?

TLS Online TPP Program

#Question id: 337

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statement below is true about the relative lifetime of a hydrogen bond, compared to the rate of water’s ionization to hydroxide ions and hydronium ions?

TLS Online TPP Program

#Question id: 336

#Unit 1. Molecules and their Interaction Relevant to Biology

Which would you expect to be most soluble in water?

TLS Online TPP Program

#Question id: 335

#Unit 1. Molecules and their Interaction Relevant to Biology

Suppose the major solutes in intact lysosomes are KCl (~0.1 M) and NaCl (~0.03 M). When isolating lysosomes, what concentration of sucrose is required in the extracting solution at room temperature (25 °C) to prevent swelling and lysis?

TLS Online TPP Program

#Question id: 334

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following statements about hydrogen bonding is not true?