Answer:
There are 4 tryptophans in the protein.
Explanation:
According to question, protein contains one tyrosine residue and say x number of tryptophans.
Concentration of protein solution = 1.0 micromolar =
Molar absorptivity of a protein solution :
Length of the cuvette = l = 1.0 cm
Absorbance of protein solution at 280 nm = A = 0.024
( Beer-Lambert's law)
Solving for x :
x = 4
There are 4 tryptophans in the protein.
The correct answer choice is CO₂ (B)
Rainwater naturally contains acids derived from carbon dioxide in the air and reacts with water vapor to form weak acids
H₂O + CO₂ ---> H₂CO₃
<h3><em>Further Explanation</em></h3>Rainwater can cause damage to buildings, animals or plants due to acid rain
Acid rain occurs because other gases in the air mix with toxic gases to form acids
Rainwater naturally contains acids derived from carbon dioxide in the air and reacts with water vapor to form weak acids
H₂O + CO₂ ---> H₂CO₃
However, due to exhaust gases from industry, motor vehicles, or power plants that use fossil fuels containing sulfur to produce sulfur dioxide gas which will produce sulfuric acid
Sulfur combustion from fossil fuels
S + O₂ ----> SO₂
SO₂ produced from this exhaust gas reacts with O₂ oxygen which oxidizes SO₂ to SO₃
SO₂ + O₂ ----> SO₃
SO3 formed reacts with water vapor in the air to produce sulfuric acid as acid rain
SO₃ + H₂O ---> H₂SO₄
To reduce the pollution from this fossil fuel, various studies are now carried out as substitute energy that is more environmentally friendly such as solar energy and so on
<h3><em>Learn more </em></h3>
Acid rain is a secondary pollutant
The impact of from acid rain
Air pollution
Keywords: acid rain, air pollution, SO₃, H₂SO₄, fossil fuel
