1. In a conventional light microscope, which of the following paths does light t
ID: 193916 • Letter: 1
Question
1. In a conventional light microscope, which of the following paths does light take after leaving the light source and before being perceived in the eye?
a.)condenser lens specimen objective lens ocular lens
b.) specimen condenser lens objective lens ocular lens
c.) condenser lens specimen ocular lens objective lens
d.) condenser lens objective lens specimen ocular lens
e.) objective lens condenser lens specimen ocular lens
2. Siderophores are iron-binding agents that transport iron into cells. Although there are structural differences among different siderophores they generally all share the property of:
A. binding extracellular ferrous iron (in its +2 oxidation state) and releasing it in the cytoplasm of the cell as ferric iron (in its +3 oxidation state).
B. binding extracellular ferric iron (in its +2 oxidation state) and releasing it in the cytoplasm of the cell as ferrous iron (in its +3 oxidation state).
C. binding extracellular ferric iron (in its +3 oxidation state) and releasing it in the cytoplasm of the cell as ferrous iron (in its +2 oxidation state).
D. binding extracellular ferrous iron (in its +3 oxidation state) and releasing it in the cytoplasm of the cell as ferric iron (in its +2 oxidation state).
Explanation / Answer
1. The answer is a.)condenser lens specimen objective lens ocular lens
The light from light source enters through the condenser lens, passes through specimen, objective lens and finally reaches to ocular lens to eye.
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