The evaporation of water requires energy, when water evaporates from a leaf (transpiration), it removes large amounts of heat from the leaf and thus cools it. The human body is cooled by the same principle, commonly known as

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#Question id: 2021

#Unit 4. Cell Communication and Cell Signaling

Which one of the following is not true for class 2 MHC protein?

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#Question id: 3058

#Unit 2. Cellular Organization

A urine sample with more than 100,000 organisms is considered indicative of infection. A urine sample containing 5,000 bacteria, with a generation time of 30 minutes, sits for 3 hours before finally being assayed. How many bacteria will then be present within the sample

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#Question id: 23870

#Unit 13. Methods in Biology

Which of the following are probably siblings?

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#Question id: 5387

#General Aptitude

The average of three numbers is 52 the first is half of second and the second is twice the third the difference between the second and first number is 

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#Question id: 4306

#Unit 3. Fundamental Processes

Which of the following molecules helps to "turn off" genes in a cell?