Answer:
a)- A= 0.84
b)- T= 14.4%
Explanation:
a) First, we need to convert the solution concentration (c) from mg/ml to mol/L by using the molecular weight of myoglobin, which is 17.8 kDa (17,800 g/mol):
c= 1 ml/ml = 1 g/L x 1 mol/17,800 g= 5.62 X 10⁻⁵ mol/L= 5.62 X 10⁻⁵ M
We have: e= 15,000 M⁻¹cm⁻¹, l= 1 cm, c= 5.62 X 10⁻⁵ M. Now, we can introduce the data in the expression for absorbance:
A= e x l x c = 15,000 M⁻¹cm⁻¹ X 1 cm x 5.62 X 10⁻⁵ M
A= 0.84
b) The percentage of the incident light which is transmitted by the solution is I/I₀.
We know that A= 0.84 and A= log₁₀(I₀/I), so:
0.84= log₁₀(I₀/I)
= I₀/I
6.97=I₀/I
We need the inverse (I/I₀):
I/I₀= 1/6.97= 0.144⇒ percentage: 0.144 x 100= 14.4 %
the bond between two water molecule is hydrogen bond.
The cell membrane is a thin flexible layer around the cells of all living things. It is sometimes called the plasma membrane or cytoplasmic membrane. Its basic job is to separate the inside of cells from the outside. In all cells, the cell membrane separates the cytoplasm inside the cell from its surroundings.
Answer:
They prevent a population from exceeding a certain number.