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?

#SCPH05 I Biotechnology
  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: 4982

#SCPH28 | Zoology

Bagworm moth caterpillars feed on evergreens and carry a silken case or bag around with them in which they eventually pupate. Adult female bagworm moths are larval in appearance; they lack the wings and other structures of the adult male and instead retain the appearance of a caterpillar even though they are sexually mature and can lay eggs within the bag. This is a good example of

TLS Online TPP Program

#Question id: 4983

#SCPH28 | Zoology

As rat pups mature, the growth of their snouts and tails outpaces growth of the rest of their bodies, producing the appearance of sexually mature males. It is found that sexually mature female rats prefer to mate with mutant, sexually mature males that possess snouts and tails with juvenile proportions. Which of the following terms is (are) appropriately applied to this situation?

TLS Online TPP Program

#Question id: 4984

#SCPH28 | Zoology

A hypothetical mutation in a squirrel population produces organisms with eight legs rather than four. Further, these mutant squirrels survive, successfully invade new habitats, and eventually give rise to a new species. The initial event, giving rise to extra legs, would be a good example of

TLS Online TPP Program

#Question id: 4985

#SCPH28 | Zoology

The loss of ventral spines by modern freshwater sticklebacks is due to natural selection operating on the phenotypic affects of Pitx1 gene

TLS Online TPP Program

#Question id: 5012

#SCPH06 I Botany

A

Silurian

I

Seed plants appear

B

Devonian

II

Gymnosperms dominant

C

Carboniferous

III

Invasion of land by primitive land plants

D

Jurassic

IV

first reptiles

TLS Online TPP Program

#Question id: 5012

#SCPH28 | Zoology

A

Silurian

I

Seed plants appear

B

Devonian

II

Gymnosperms dominant

C

Carboniferous

III

Invasion of land by primitive land plants

D

Jurassic

IV

first reptiles