Question

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Test IV. Give the correct order for human classification Level classification Test V. Synthesis 1. Give the flow of the photosynthetic processes involved in the light reaction. (15 points) 2. Explain briefly the reactions in the Calvin Cycle. (15 points) 3. Give the differences of the three basic photosynthesis reactions pathways (20 points)

Answer 1

1. Homo sapiens classification:
Kingdom = Animalia
Phylum = Chordata
Class = Mammalia
Order = Primates
Family = Hominidae
Subfamily = Homininae
Genus = Homo
Species = sapiens

Test V
1. Flow of electrons through noncyclicphotophosphorylation:
H2O ---> PS-II ---> Pheophytin ---> Plastoquinone ---> Cyt B6f complex ---> Plastocyanine ---> PS-II ---> Fd ---> FNR ---> NADP+

The flow of electrons through cyclic photophosphorylation:
PS-I ---> Fd ---> Cyt B6f ---> PS-I

2. Reactions of the Calvin cycle:
a. Carboxylation: RuBP fuses with CO2 to produce 3-PG
b. Reduction: 3-PG is reduced to G-3-P
c. Regeneration: G-3-P is used to regenerate RuBP
For one glucose production, 18 ATP and 12 NADPH are required.
i.e. For one molecule of CO2 reduction, 3 ATP and 2 NADPH are required.

3. See the image

Comparison of C3, C4, and CAM plants C3 plants Primary carboxylase = Rubisco C4 plants Primary carboxylase = PEP carboxylase First stable product = Malate or aspartate Cam plants Primary carboxylase = PEP carboxylase First stable product = 3- Phosphoglycerate First stable product = Malate Stomata open during the day Stomata open during the day High photorespiration These plants grow in cool, wet climate Low photorespiration These plants grow in tropical and dry climates Stomata open during the night Low photorespiration These plants grow in dry and arid climate Typical leaf anatomy Kranz anatomy Xeromorphic anatomy Ex: pea Ex: Maize Ex: Aloe