The answer would be C. Sending the first human into space. :D
It is thought to partition transcription and processing of messenger RNAs (mRNAs), which occur in the nucleus, from protein synthesis (translation), which is observed in the cytoplasm. Several recent reports have challenged this widely accepted idea by asserting that translation can also occur in the nucleus.
In terms of the net reactants and products, yes, cellular respiration is the reverse of photosynthesis.
Cellular respiration: Glucose and oxygen are used to make ATP, carbon dioxide, and water.
Photosynthesis: ATP, carbon dioxide, and water are used to make glucose and oxygen.
However, their pathways are NOT the reverse of each other. The enzymes involved are vastly different for each, so only the net reaction is the "reverse."
