Feedback repression involves the turning “off” of enzyme synthesis when the amount of the product has been made in sufficient quantities. The end product of the pathway acts as

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#Question id: 23678

#Unit 13. Methods in Biology

Which component is not necessary for a PCR experiment?

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#Question id: 12757

#Unit 10. Ecological Principles

Biomanipulation can best be described as

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#Question id: 23795

#Unit 7. System Physiology – Animal

Correctly match the responses with given cells according their functions;

Cells	Responses
1.Rods, cones and horizontal cells	p. hyperpolarizing potential
2.Bipolar cells	q. depolarizing potential
3.Amacrine cells	r. Either hyperpolarizing or depolarizing potential

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#Question id: 11037

#Unit 7. System Physiology – Animal

A 22-year-old man has a muscle blood flow of 250 ml/min and a hematocrit of 50. He has a mean arterial pressure of 130 mm Hg, a muscle venous pressure of 5 mm Hg, and a heart rate of 80 beats/min. Which of the following is the approximate vascular resistance in the muscle of this man?

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#Question id: 11957

#Unit 7. System Physiology – Animal

Because the foods eaten by animals are often composed largely of macromolecules, animals need to have mechanisms for ________.