Round and Round
Pass it On
100
This biological cycle consumes carbon dioxide.
What is the Calvin Cycle
100
This molecule carries genetic information from one generation to the next.
What is DNA?
200
Ammonia is a compound in this biogeochemical cycle.
What is the Nitrogen Cycle?
200
The gap between two neurons across which an impulse travels.
What is a synaptic cleft?
300
In one component of this biological pathway, electron flow can be cyclic.
What is photosynthesis?
300
The (energetically) downhill movement of these entities contributes to formation of a proton gradient.
What are electrons?
400
DNA synthesis occurs during this cycle.
What is mitosis (or cell cycle)?
400
The fraction of biomass from one trophic level that is conveyed as biomass to the next trophic level.
What is 1/10?
500
These circular molecules - derived from bacteria - make useful vectors for genetic engineering.
What is a plasmid?
500
These specialized macromolecules convey extracellular signals to a cell's interior.
What is a trans-membrane protein?
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