from nanotechnology understanding small systems, 3rd editon. please solve all pr
ID: 176398 • Letter: F
Question
from nanotechnology understanding small systems, 3rd editon. please solve all problems. thanks in advance
The random motion of molecules within a cell is driven by energy from heat.
a. At what temperature do most cells prefer to live?
b. The calorie is a unit of energy defined as the amount of energy needed to raise
1 g of water by 1°C. A bacterium (which is mostly water) weighs about 1 pg.
Roughly, how many grams of sugar does a cell have to use to warm back up to
its preferred temperature if it is suddenly placed in a cooler environment that
lowers the cell's internal temperature by 5°C?
c. If the sugar used for energy is glucose (molecular mass = 180.16 g/mol), how
many molecules are used?
d. How much mass would be used as fuel to warm the cell if, instead of sugar,
fatty acids served as the energy source?
Explanation / Answer
1. Most cells prefer to live at its optimum temperature around 37 degree centigrade and room temperature.Picogram is one trillionth of a gram . Hdat can be gained from the environment through rradiation too.
2. Roughly 0.02 grams of sugar is required for a cell to warm back to its preffered temperature whenit is placed in a cooler environment.
3.18 molecules og glucose are used for the energy.
4.less amount of mass is required if fatty acid is used as the energy source.Approximately less than 0.2 grams required.
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