Experiment 1: Paper
ChromatographyData Tables and Post-Lab AssessmentTable 1: Part 1:
Original Line to Solvent Front
Number of Bands
Table 2: Part 3:
Time Required to
Time Required to
Change Color (Hours)
Post-Lab Questions1. What did the different colored bands signify in each
solvent for Part 1? What pigments can you associate them with?2. What is the osmolarity fluid used in Part 2? Why is this
important? Why is it essential to keep it cool?3. How could you modify this experiment to show the effects of
different wavelengths of light on the photosynthetic rate?4. Some plants (grasses) tend to contain a greater
concentration of chlorophyll than others (pines). Can you develop a hypothesis
to explain this? Would it be testable?5. Saliva
does not contain amylase until babies are two months old. How could this affect
an infantâs digestive requirements?
Answer the following 5 questions in depth:
1. What was the main theme of this
2. To what degree were the objectives
outlined in the introduction to this experiment met?
3. What conclusions were drawn from the
4. What was the clearest and also the most
difficult aspects of this experiment?
5. How would you improve this experiment?Lab 20: Energy and
1. Describe how the functional units for beta carotene,
xanthophyll, chlorophyll A, and chlorophyll B are different. Be sure to
identify the subunits that adhere to paper during chromatography.
2. Describe a technique for measuring photosynthetic rate.
3. Many deciduous trees have leaves which turn yellow in the
fall. What do you suppose is happening in the leaves at the cellular and molecular
4. Chloroplasts and mitochondria are both are unusual in that
they have double membranes and contain their own set of DNA. Can you think of
any explanations for this observation?