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Photosynthesis: Quiz


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Question 1: ________, the enzyme that captures carbon dioxide in the light-independent reactions, has a binding affinity for both carbon dioxide and oxygen.
Ornithine decarboxylaseAcetoacetate decarboxylaseRuBisCOPhosphoenolpyruvate carboxykinase

Question 2: What does the following picture show?

  Plant cells with visible chloroplasts (from a moss, Plagiomnium affine).

Question 3: In all, photosynthetic organisms convert around 100,000,000,000 tonnes of carbon into ________ per year.
BioenergyEthanol fuelBiofuelBiomass

Question 4: The first photosynthetic organisms probably evolved about 3,500 million years ago, and used ________ or hydrogen sulfide as sources of electrons, rather than water.

Question 5: In plants, algae and cyanobacteria this is done by a sequence of reactions called the ________, but different sets of reactions are found in some bacteria, such as the reverse Krebs cycle in Chlorobium.
MicrobiologyCalvin cycleBiochemistryCitric acid cycle

Question 6: A typical ________ contains about 10 to 100 chloroplasts.
Cell wallPlant cellFlowering plantPlastid

Question 7: The surface of the leaf is uniformly coated with a water-resistant waxy cuticle that protects the leaf from excessive evaporation of water and decreases the absorption of ultraviolet or ________ light to reduce heating.
BlueGreenOrange (colour)Indigo

Question 8: For example, the process always begins when energy from light is absorbed by proteins called photosynthetic reaction centers that contain ________.
PlantPlant physiologyPhotosynthesisChlorophyll

Question 9: Xerophytes such as ________ and most succulents also use PEP carboxylase to capture carbon dioxide in a process called Crassulacean acid metabolism (CAM).
OrchidaceaeCactusFlowering plantPlant

Question 10: ________ usually convert light into chemical energy with a photosynthetic efficiency of 3-6%.
Red algaeFungusPlantArchaeplastida


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