Answer to Question 1
ANS: B
Transferrin is the carrier protein for iron. Ferritin and hemosiderin are storage forms of iron. Albumin is a carrier protein for many substances but not for iron.
Answer to Question 2
ANS: C
Ferritin is the soluble form of storage iron and is more readily available for use. Hemosiderin is ferritin that has been partially degraded; as a result, it is insoluble and precipitates. It is this form of storage iron that is stained by iron-specific stains such as the Prussian blue stain.
Positive regulation of the lac operon by the catabolite activator protein (CAP)
A Motor Protein Drives Vesicles along Microtubules
Hemoglobin Contains Heme Iron
Carrier Mediated Facilitated Diffusion
HER-2 protein and gene-amplification assays
The quaternary level of protein structure as seen in hemoglobin