Question

what’s developed as a result of the electron transport chain?
a) phospholipid bilayer
b) membrane potential
c) new cells
d) energy carrier nadph

question 9 (5 points)
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which of the following equations represents the right chemical process that occurs in photosynthesis?
a) six molecules of oxygen plus six molecules of water plus light energy converts six molecules of carbon dioxide plus sugar.
b) six molecules of carbon dioxide plus six molecules of water plus light energy converts six molecules of oxygen plus sugar.
c) six molecules of water plus six molecules of hydrogen plus six molecules of oxygen converts light energy plus sugar.

Explanation:

First Question (What's developed as a result of the electron transport chain?)

• The electron transport chain (ETC) in cellular respiration (or in photosynthesis) involves the transfer of electrons, which leads to the pumping of protons across a membrane (e.g., mitochondrial inner membrane or thylakoid membrane). This creates a concentration gradient of protons, and the resulting difference in charge and proton concentration across the membrane is the membrane potential.
• Option A: The phospholipid bilayer is a structural component of cell membranes, not a direct result of the ETC.
• Option C: New cells are produced via cell division (mitosis/meiosis), not the ETC.
• Option D: NADPH is produced in the light - dependent reactions of photosynthesis (via processes like the electron transport chain in photosynthesis, but the main result of the ETC in terms of a gradient/energy - related potential is membrane potential; also, NADPH production is more about the end - product of electron flow in photosynthetic ETC, while the key consequence of the ETC's proton pumping is membrane potential).

Second Question (Which equation represents photosynthesis?)

• The overall chemical equation for photosynthesis is \(6CO_2 + 6H_2O+\text{light energy}

ightarrow C_6H_{12}O_6 + 6O_2\) (where \(C_6H_{12}O_6\) is a type of sugar, like glucose).

• Option A: The reactants and products are reversed (oxygen and water as reactants, carbon dioxide and sugar as products) which is more like cellular respiration.
• Option C: The reactants (water, hydrogen, oxygen) and the process description are incorrect for photosynthesis.

Answer:

B) Membrane potential