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Step2247 [10]
2 years ago
15

His muscles, blood vessels and nervous system work together to restore his body temperature. Which term best describes this proc

ess
Biology
1 answer:
NARA [144]2 years ago
7 0

Answer:

Homeostasis

Explanation:

It is a process that living things use to actively maintain fairly stable conditions necessary for survival.

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A spheroidal bacterium with a diameter of 1 mm contains 2 molecules of a particular protein. What is the molar concentration?
creativ13 [48]

Answer : The molar concentration is, 6.35\times 10^{-18}mol/L

Explanation :

First we have to calculate the moles of protein.

\text{Moles of protein}=\frac{\text{Number of molecules of protein}}{\text{Avogadro's number}}

Number of molecules of protein = 2 molecules

Avogadro's number =  6.022\times 10^{23}molecules/mol

\text{Moles of protein}=\frac{2\text{ molecules}}{6.022\times 10^{23}molecules/mol}=3.32\times 10^{-24}mol

Now we have to calculate the radius.

Radius = \frac{Diameter}{2}=\frac{1mm}{2}=0.5mm=5.0\times 10^{-4}m

Conversion used : (1 mm = 0.001 m)

Now we have to calculate the volume.

V=\frac{4}{3}\pi r^3

V=\frac{4}{3}\times 3.14\times (5.0\times 10^{-4}m)^3

V=5.23\times 10^{-10}m^3=5.23\times 10^{-7}L

Conversion used : (1 m³ = 1000 L)

Now we have to calculate the molar concentration.

Concentration=\frac{\text{Moles of protein}}{\text{Volume}}

Concentration=\frac{3.32\times 10^{-24}mol}{5.23\times 10^{-7}L}

Concentration=6.35\times 10^{-18}mol/L

Thus, the molar concentration is, 6.35\times 10^{-18}mol/L

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