Ricin exerts its effects on a human cell by _____

a. inactivating synthesis of carbohydrates
b. inhibiting hydrolysis of carbohydrates
c. preventing protein synthesis
d. interfering with hydrolysis of lipids
e. over activating nucleic acid metabolism


ANSWER: c

Biology & Microbiology

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In mutualism

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Leukemia is a type of cancer that involves the uncontrolled division of ____________________ cells. Fill in the blank(s) with the appropriate word(s)

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Increases in elevation are accompanied by decreases in temperature

The rate at which temperature drops as elevation increases is referred to as the dry adiabatic lapse rate, which gives a drop in temperature of rising unsaturated air of about 10°C for every 1000 meters. If the temperature is 25°C at the base of the mountain, what temperatures do organisms experience 3000 meters upslope? A) 5°C B) 0°C C) -5°C D) -15°C

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Which of the following explains why females are more likely to be "choosy" about mating partners than males?

a. Females are more limited in the number of offspring they can produce than males are b. Eggs require more energy to produce than sperm c. Males can fertilize the eggs of multiple females, while a female's egg can only be fertilized by a single male d. All of these

Biology & Microbiology