labphotosynth1

labphotosynth1 - Exercise #6 PHOTOSYNTHESIS In the process...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Exercise #6 PHOTOSYNTHESIS In the process of photosynthesis photosynthesis , several energy transformations take place. -Light energy is captured by plant cells and is converted into electrical energy in the form of high energy electrons. -The kinetic energy of the electron is transformed into chemical energy in the bonds of ATP. -The ATP, in turn, transfers the energy to the chemical bonds of a glucose molecule. Through this process, light energy from the sun is captured and stored in the chemical bonds of sugar molecules.
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Exercise #6 PHOTOSYNTHESIS PHOTOSYNTHETIC PIGMENTS PHOTOSYNTHETIC PIGMENTS The initial step of photosynthesis involves the capture of light energy by the photosynthetic pigment, chlorophyll chlorophyll . However, the plant does not absorb all of the light energy in the visible portion of the electromagnet electromagnetic spectrum spectrum . - Figure 6.1 of your lab manual represents the visible portion of the electromagnetic spectrum. In this exercise, you will use the spectrophotometer to determine which wavelengths of light are absorbed and which ones are reflected by the chlorophyll molecule.
Background image of page 2
PHOTOSYNTHESIS PROCEDURE PROCEDURE In order to study the absorbance of various wavelengths of light by chlorophyll, you must first separate the pigment from the leaf tissue. This is accomplished by following the procedure below: 1) Place a large spinach leaf into a 50 ml beaker and add 30 ml of ethanol. 2) Place the beaker with ethanol on a hot plate and slowly heat the solution taking care not to crush the leaf or boil the ethanol solution. 3) As the chlorophyll exits the leaf tissue it will enter the ethanol solution and turn the color green. 4) Fill the cuvette approximately 2/3 full will the chlorophyll extract. Refer to the diagrams on the
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 11/07/2011 for the course BIOLOGY 100 taught by Professor Staff during the Winter '08 term at BYU.

Page1 / 13

labphotosynth1 - Exercise #6 PHOTOSYNTHESIS In the process...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online