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Early Archaeal Photosynthesis Quiz

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Questions and Answers

What is the primary purpose of photosynthesis?

To metabolize organic compounds through cellular respiration

To convert chemical energy into light energy

To produce oxygen as a byproduct

To store energy in organic compounds for later use (correct)

Which organisms are referred to as photoautotrophs?

Animals and insects

Most bacteria and archaea

Fungi and lichens

Plants, algae, and cyanobacteria (correct)

What are the byproducts of oxygenic photosynthesis?

Carbon dioxide and hydrogen sulfide

Sulfur and water

Water and carbohydrates

Oxygen and carbon dioxide (correct)

Which organisms perform anoxygenic photosynthesis?

Bacteria and archaea (C) Signup and view all the answers

What role does ATP play in photosynthesis?

It powers proton pumps to directly synthesize ATP (A) Signup and view all the answers

What is the initial step in the process of photosynthesis?

Absorption of light energy by chlorophyll (B) Signup and view all the answers

Where are the proteins responsible for photosynthesis, such as chlorophyll, held in plants?

Inside organelles called chloroplasts (D) Signup and view all the answers

Which compounds serve as short-term stores of energy to later drive other reactions in the process of photosynthesis?

Reduced nicotinamide adenine dinucleotide phosphate (NADPH) and adenosine triphosphate (ATP) (D) Signup and view all the answers

What role did cyanobacteria play in the history of Earth's oxygenation?

The excess oxygen they produced directly contributed to the oxygenation of the Earth (B) Signup and view all the answers

What did Jan Ingenhousz discover in 1779 related to photosynthesis?

Plants receive some energy from light (B) Signup and view all the answers