Answer:
Nitrogen
Explanation:
All living organisms need nitrogen in order to build proteins and build DNA.
Some animals (most) get nitrogen by eating plants I believe.
Answer:
Purify peroxidase through metal affinity chromatography
Explanation:
In order to make sure the turnip peroxidase is responsible for the color change of guaiacol and not some other turnip enzyme it would be necessary to purify peroxidase through metal affinity chromatography. For the change of color some factors need to be appreciated too, pH, enzyme concentration and temperature will influence the reaction. Peroxidase is a heme, an enzyme encouraged of the catalyze reaction of hydrogen peroxide.
The right answer is The texture.
In petrography, the texture (sometimes called structure) of a rock characterizes the arrangement of the crystals between them at the scale of the sample, the thin slice or even on a finer scale.
Texture is a characteristic determined by the size, shape and disposition of minerals in a rock that is observed at the microscopic scale. It allows to build the relationship between these characteristics and the conditions of formation of a rock (especially in the case of magmatic rocks, the rate of cooling).
