Practice Questions

TLS Online TPP Program

#Question id: 7306

A plant scientist was hired by a greenhouse operator to devise a way to force iris plants to bloom in the short days of winter. Iris normally blooms as a long-day (short-night) plant. Which of the following has the best chance of creating iris blooms in winter?

#Unit 5. Developmental Biology

Artificially increase the period of darkness in the greenhouse.
Increase the temperature to more closely follow summer temperatures.
Alternate four hours of darkness with four hours of light repeatedly over each 24-hour period.
Interrupt the long winter nights with a brief period of light.

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TLS Online TPP Program

#Question id: 464

#Unit 1. Molecules and their Interaction Relevant to Biology

Calculate the equilibrium constant for an oxidation-reduction reaction involving the transfer of 1 mole of electrons with DE0ʹ= 0.25 V. (R = 8.315 JK-1mol-1, F = 96.48 kJV-1mol-1, T = 298 K)

TLS Online TPP Program

#Question id: 24658

#Unit 2. Cellular Organization

Each monomer of aquaporin1 has six transmembrane helical segments and two shorter helices, both of which contain the sequence:

TLS Online TPP Program

#Question id: 10935

#Unit 1. Molecules and their Interaction Relevant to Biology

The pH at which imidazole of histidine ring will be protonated………….. and imine group of proline will be deprotonated…………….

TLS Online TPP Program

#Question id: 12333

#Unit 10. Ecological Principles

Coral animals