Analyzing pigments of a green plant?
Please need help understanding these questions
1. In a paper chromatography lab, a student analyzed the pigments of a green plant. As well as using the pigment mixture of the green plant, the student used single known pigments for comparison.
The student measured the distance between points 6 and 5 (the top edge of the solvent) as 12.3 cm and the distance between 6 and the red pigment as 10.9 cm. Calculate the Rf value for the red pigment and enter your response using two significant figures.
2. When an electron is emitted from photosystem II (see step 1 in process below), it does not return. The photosystem cannot trap any more light energy until the “hole” in the photosystem is filled with another electron.
photosystems
The source of the electron that fills the “hole” in photosystem II is
Select one:
a. carbon dioxide
b. NADPH for reducing power
c. photosystem I
d. water which splits into H+ ions and oxygen
3. In the light dependent reactions the following process occurs.
The process that occurs when these hydrogen atoms (along with electrons) pass back to the stroma through a specialized channel
Select one:
a. is an electron transport chain and uses NADPH
b. is an electron transport chain and creates NADPH
c. is called chemiosmosis and requires ATP
d. is called chemiosmosis and produces ATP
