Galactose imported into the yeast cell is converted to galactose 6-phosphate by a pathway involving six enzymes, whose genes are scattered over three chromosomes. Transcription of these genes is regulated by the combined actions of the proteins Gal4p, Gal80p, and Gal3p,

i. GAL3	a. Interaction with the Gal80p-Gal4p complex and activates Gal4p.
ii. GAL4	b. Recruits SAGA, Mediator, and TFIID to the galactose promoters, leading to DNA polymerase II recruitment and initiation of transcription
iii. GAL80	c. Transcriptional inhibitor
	d. Transcriptional activator

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#Question id: 12952

#Unit 7. System Physiology – Animal

Which of the following changes would tend to increase Ca2+ reabsorption in the renal tubule?

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#Question id: 12953

#Unit 7. System Physiology – Animal

 Which of the following diuretics inhibits Na+-2Cl−-K+ co-transport in the loop of Henle as its primary action?

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#Question id: 12954

#Unit 7. System Physiology – Animal

A 55-year-old male patient with hypertension has had his blood pressure reasonably well controlled by administration of a thiazide diuretic. During his last visit (6 months ago) his blood pressure was 130/75 mm Hg and his serum creatinine was 1 mg/100 ml. He has been exercising regularly for the past 2 years, but recently has complained of knee pain and began taking large amounts of a nonsteroidal anti-inflammatory drug. When he arrives at your office, his blood pressure is 155/85 and his serum creatinine is now 2.5 mg/100 ml. Which of the following best explains his increased serum creatinine?

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#Question id: 12955

#Unit 7. System Physiology – Animal

Which of the following would tend to decrease GFR by more than 10% in a normal kidney?

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#Question id: 12956

#Unit 10. Ecological Principles

For  nearly 200  years, biogeographers have  noted that  the  tropics  have  more terrestrial species than  temperate regions. Which of the following is NOT a plausible explanation for this pattern?

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#Question id: 12957

#Unit 10. Ecological Principles

Dichlorodiphenyltrichloroethane is related to the phenomenon of: