Biochemical Cycling Practice Quiz Flashcards
What is the significance of C HOPKINS CaFe?
It is a mnemonic reminder of the core set of elements that all living organisms require
What is biogeochemical cycling?
Transitioning elements between their organic and inorganic forms
From where does a chemoheterotroph obtain its energy?
From organic molecules
From where does a chemoautotroph obtain its energy?
From reduced inorganic compounds and minerals (Fe2+, H2S, etc.)
What event in Earth’s history allowed for complex organisms (plants and animals) to develop?
Accumulation of oxygen in the atmosphere
What is the main purpose of the Calvin Cycle?
Generating glyceraldehyde 3- phosphate
Considering that the Calvin Cycle is a cycle, what are the products of the Calvin Cycle? Select all that apply.
Ribulose 1,5-bisphosphate and Glyceraldehyde 3-phosphate
Which organisms fix carbon using the Calvin Cycle?
Photoautotrophs
Which organisms fix carbon using the reductive TCA cycle?
Chemoautotrophs
From where does a photoheterotroph obtain its organic carbon?
From organic molecules
Where do the organisms that carry out the Reductive TCA cycle obtain their energy?
From reduced inorganic compounds?
Where do the organisms that carry out the Calvin Cycle obtain their energy?
From sunlight
What molecule provides the reducing power for the Calvin Cycle?
NADPH
Which step uses the enzyme, Glutamine synthetase in Nitrogen Cycle?
Assimilation
Which step uses the enzyme, Nitrogenase in Nitrogen cycle?
Nitrogen fixation
