AP BIOLOGY

LABORATORY REVIEW

MOLECULAR BIOLOGY

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which does NOT need to be marked or measured during separation of pigments by chromatography?
A
starting location of concentrated pigments
B
distance moved by solvent
C
distance moved by pigment A
D
distance between pigments A and B
Explanation: 

Detailed explanation-1: -What factors are involved in the separation of the pigments? The factors that are involved in the separation of the pigments in this lab are solubility, size of particles, and their attractiveness to the paper are involved in the separation of the pigments.

Detailed explanation-2: -Pigments are separated according to differences in their relative solubilities. In order to extract these pigments from the thylakoid membranes of the chloroplasts, the organelles in which photosynthesis occurs, fresh, ground or torn leaves (preferably spinach) may be soaked in acetone or concentrated alcohol.

Detailed explanation-3: -A pigment that is the most soluble will travel the greatest distance and a pigment that is less soluble will move a shorter distance. The distance the pigment travels is unique for that pigment in set conditions and is used to identify the pigment.

There is 1 question to complete.