Mouse cumulus cells also secrete a substance that attracts sperm and hyperactivates them through calcium ion channels. The substance is

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#Question id: 28157

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is the cofactor for glutathione peroxidase 

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#Question id: 12130

#Unit 10. Ecological Principles

Use the following diagram of a hypothetical food web to answer the following questions. The arrows represent the transfer of food energy between the various trophic levels.

Which letter represents an organism that could be a carnivore?

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#Question id: 18907

#Unit 13. Methods in Biology

When expression of the DNA insert is desired, the vector should contain at least suitable control elements, 

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#Question id: 15758

#Unit 12. Applied Biology

Adsorbants like activated charcoal or PVP (polyvinylpyrrolidon) may be used as adsorbant to prevent

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#Question id: 11669

#Unit 7. System Physiology – Animal

Within a normally functioning kidney, red blood cells can be found in ________.