- 2. Give two examples of when you have used the scientific method (outside of school).
- Question 6 (1 point) Similar to the firing of a neuron in the brain channelrhodopsin triggers an action potential. What specifically causes an action potential? A. An action potential is triggered when a voltage difference is established across the plasma membrane. B. An action potential is triggered when positively charged ions move into the cell. C. An action potential is triggered when light is absorbed by a pigment molecule. D. An action potential is triggered when a G-protein binds to a receptor molecule.
- Question 5(1 point) 4 Saved Cells of Chlamydomon as appear green under a light microscope because green photons are reflected by chlorophyll or pass right through it. What is the biophysical reason why chlorophyll cannot absorb green light? A. Green photons are too unstable to be absorbed by chlorophyll. B. Chlorophyll lacks an excited state that matches the energy of a green photon. C. Green photons of light contain too much energy; absorption would result in the oxidation of chlorophyll. D. Chlorophyll does absorb green light; the excited state just decays very rapidly with the energy being lost as heat.
- Question 4(1 point) Recall our comparison of photochemistry between a photoreceptor and a photosystem. What is one way a photosystem is different from a photoreceptor? A. It is only in a photosystem where a pigment molecule is specifically bound to a protein. B. It is only in a photosystem where light absorption triggers a change in shape of a protein. C. It is only in a photosystem where light absorption excites an electron. D. It is only in a photosystem where light absorption triggers the oxidation (loss of an e-) of pigment. √ Saved
- Question 3(1 point) Which of the following proteins is a component of both bacterial flagella and human flagella? A. Dynein B. Alpha tubulin C. Opsin D. None of the above Saved
