TLS Online TPP Program

#Question id: 23196


What kind of lenses are used to focus a high-velocity electron beam instead of the visible light.

#Unit 13. Methods in Biology
  1. Electromagnetic lenses
  2. Electric lenses
  3. Magnifying lenses
  4. Glass lenses
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TLS Online TPP Program

#Question id: 26902

#Unit 10. Ecological Principles

Which characteristics are considered the species that are more prone to extinction?

TLS Online TPP Program

#Question id: 11520

#Unit 2. Cellular Organization

For the SERCA pump, how many Ca2+ ions moves across the membrane during each catalytic cycle ?

TLS Online TPP Program

#Question id: 11800

#Unit 6. System Physiology – Plant

There are at least three different types of companion cells in the minor veins of mature, exporting leaves. Which of the following statements about these companion cells is CORRECT?

 a.) transfer cells are transport sugars enter the apoplast during the movement of sugars from mesophyll cells to sieve elements. Transfer cells transport sugars from the apoplast to the symplast of the sieve elements and companion cells in the source.

 b.) the numerous mitochondria in companion cells may supply energy as ATP to the sieve elements

 c.) Ordinary companion cells can function in either symplastic or apoplastic short-distance transport in source leaves, depending in part on plasmodesmatal frequencies

 d.) Intermediary cells, by contrast, function in symplastic transport of sugars from mesophyll cells to sieve elements

TLS Online TPP Program

#Question id: 32426

#Unit 2. Cellular Organization

Nonmuscle cells contain several types of contractile bundles composed of:

TLS Online TPP Program

#Question id: 2183

#Unit 2. Cellular Organization

Transepithelial glucose transport uses a symporter to transport glucose up a concentration gradient by: