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The hydrolysis of pyrophosphate to orthophosphate is important in driving forward biosynthetic reactions, such as the synthesis of DNA. This hydrolytic reaction is catalyzed in E. coli by a pyrophosphate that has a mass of 120 kd and consists of six identical subunits. For this enzyme, a unit of activity […]

1. A human population increasing at the rate of 0.8%/yr (Ch. 36A, Population Ecology) would double in size every a. 100 years.b. 87-88 years.c. 70 years.d. 35 years.e. 77-78 years. 2. Desert plant species that look similar to each other today, but are actually unrelated (history of origins, Ch. 15) […]

hypercholesterlemia is a genetic diease that affects 1 out of 500 people worldwide. this is more that one genetic cause of the disease. Class 1 is described as an autosome dominant disease. those affected have cholesterol levels>250 as children and >300 as adults. homozygotes have cholesterol levelts of >600 as […]

Q. A 22- year old man was in a motorcycle accident with resultant neck injuries that led to partial paralysis of the upper and lower limbs. Almost immediately his chest felt heavy and he became dyspneic. His pulmonary values: Vital capacity (supine) = 650 mlMinute ventilation (supine) = 6 L/minRespiratory […]