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Photosynthesis Lab 3: Microbial Types and Oxygenic Photosynthesis

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Photosynthesis Lab 3: Microbial Types and Oxygenic Photosynthesis

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Questions and Answers

What is the distinguishing feature of anoxygenic photosynthesis?

Production of carbon dioxide

Use of chlorophyll

Production of oxygen (correct)

Use of bacteriorhodopsin

Which organisms are capable of anoxygenic photosynthesis?

Purple and green photosynthetic bacteria (correct)

Green plants

Cyanobacteria

Algae

What pigment is used by halophilic members of the Archaea for phototrophic growth?

Melanin

Rhodopsin

Chlorophyll

Bacteriorhodopsin (correct)

Which pigment is used in oxygenic photosynthesis?

Chlorophyll Signup and view all the answers

Why does the phototrophic growth mechanism found in halophilic members of the Archaea not qualify as photosynthesis by some definitions?

No pigment is involved Signup and view all the answers

Which type of microbial organisms are able to carry out photosynthesis?

Multiple types including cyanobacteria, algae, and purple and green photosynthetic bacteria Signup and view all the answers

What is the primary function of the 'light' reactions in photosynthesis?

Trap light energy and produce ATP Signup and view all the answers

Which molecules predominate in organisms carrying out oxygenic photosynthesis?

Chlorophyll a and b Signup and view all the answers

What is the role of the antenna molecules in the light-gathering process?

Absorb photons of radiant light Signup and view all the answers

What is the function of the 'dark' reactions in photosynthesis?

Dependent on the ATP and NADPH produced by the light reaction Signup and view all the answers

Which molecules are involved in the reduction of carbon dioxide to produce carbohydrates?

ATP and NADPH Signup and view all the answers

What is the term used to describe the pigment/protein complex where electron transfer occurs following excitation of the chlorophyll molecule?

Reaction centre Signup and view all the answers

'Dark' reactions are dependent on which products from the 'light' reactions?

ATP and NADPH Signup and view all the answers

What is the immediate result of chlorophyll absorbing photons of light?

'Excited' state of the molecule Signup and view all the answers

What is the function of chlorophyll in oxygenic photosynthesis?

Pass excited electrons to convert NADP+ to NADPH Signup and view all the answers