When a photon collides with a pigment in a photosystem, an electron is boosted to a higher orbital and then ________
a. returns to its ground state, emitting the extra energy as heat
b. returns to its ground state, emitting the extra energy as a photon of lower energy
c. the electron enters an electron transfer chain in the stroma
d. the electron enters an electron transfer chain in the thylakoid membrane
d
You might also like to view...
Skeletal muscle contraction is largely dependent on calcium ions that enter the cell from:
A. the extracellular space. B. the sarcoplasmic reticulum. C. the T tubule. D. the Z disc.
Bioremediation is:
A. the use of microorganisms to treat open wounds B. the use of microorganisms to break down harmful substances such as sewage, pesticides, petrochemicals, and explosives C. the use of bacteria to attack cancer cells D. the use of microorganisms to attack pathogenic bacteria E. none of the other options presented
How many layers does the plasma membrane have?
a. One b. Two c. Three d. Four
Figure 39.7A
Use the figure above to answer the following question.
The teeth designated by the letter "B" in the above figure are called ____.
A. canines B. premolars C. incisors D. molars E. wisdom teeth