Question

5.g - unit c: photosynthesis and cellular respiration exam\
possible points: 4.17\
in a chromatography experiment, chlorophyll was extracted from a spider plant. the rf value was calculated as the distance the chlorophyll pigment traveled divided by the distance the solvent traveled. in this experiment the dependent (responding) variable is the\
\
\bigcirc distance the chlorophyll pigment traveled.\
\bigcirc number of atp and nadph molecules that are synthesized.\
\bigcirc amount of light energy absorbed.\
\bigcirc time it took for the pigment to travel.

Explanation:

In chromatography, the Rf value is calculated as \( \frac{\text{distance traveled by solute (pigment)}}{\text{distance traveled by solvent}} \). The dependent (responding) variable here is what's being measured in relation to the independent variable (solvent's distance). The Rf calculation's numerator is the distance the chlorophyll pigment traveled, so that's the dependent variable in this context (as it's the value responding based on the solvent's distance for Rf calculation). Other options: ATP/NADPH synthesis, light energy absorbed, or time for pigment to travel aren't directly related to Rf calculation's dependent variable here.

Answer:

A. distance the chlorophyll pigment traveled.