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TLS Online TPP Program

#Question id: 451

The standard reduction potentials (E'°) for the following half reactions are given.

Fumarate + 2H+ + 2e– -> succinate E'° = +0.031 V

FAD + 2H+ + 2e– -> FADH2 E'° = –0.219 V

If you mixed succinate, fumarate, FAD, and FADH2 together, all at l M concentrations and in the presence of succinate dehydrogenase, which of the following would happen initially?

#Unit 1. Molecules and their Interaction Relevant to Biology

  1. Fumarate and succinate would become oxidized; FAD and FADH2 would become reduced.

  2. Fumarate would become reduced, FADH2 would become oxidized.

  3. No reaction would occur because all reactants and products are already at their standard concentrations.

  4. Succinate would become oxidized, FAD would become reduced.

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TLS Online TPP Program

#Question id: 28850

#Unit 2. Cellular Organization

Kinesin-13 bind and curve the end of the tubulin protofilaments into which conformation?
TLS Online TPP Program

#Question id: 3538

#Unit 8. Inheritance Biology

Monohybrid cross allowed between heterozygous Rr (Round) and RR (Round), all progeny having Round seeded plant were allowed to self-fertilize to produce numerous progeny that are 
TLS Online TPP Program

#Question id: 11200

#Unit 7. System Physiology – Animal

Action potentials are normally carried in only one direction: from the axon hillock toward the axon terminals. If you experimentally depolarize the middle of the axon to threshold, using an electronic probe, then ________.
TLS Online TPP Program

#Question id: 18221

#Unit 9. Diversity of Life Forms

In animal cells and in the meristem cells of land plants, the nuclear envelope disintegrates during mitosis. This disintegration does not occur in the cells of most protists and fungi. According to our current knowledge of plant evolution, which group of organisms should feature mitosis most similar to that of land plants? 
TLS Online TPP Program

#Question id: 9242

#Unit 9. Diversity of Life Forms

Eutrophication is often caused by excess limiting-nutrient runoff from agricultural fields into aquatic ecosystems. This process results in massive algal blooms that eventually die and decompose, ultimately depleting the dissolved oxygen, killing large numbers of fish and other aquatic organisms. Predict which of the following human actions would best address the problem of eutrophication near agricultural areas?