"apo-repressor of trp operon is an inactive form of repressor." justify this statement. select one of the options below as your
a. apo-repressor can only bind to the operator site of trp operon when a tryptophan molecule, which is a co-repressor, binds to it.
b. apo-repressor acts as an inducer if there is a lesser amount of tryptophan present in the surrounding medium and remains inactive when sufficient tryptophan is present.
c. apo-repressor cannot bind to the operator site of trp operon if a tryptophan molecule, which is a co- repressor, binds to it.

This is a typical grassland food web. it is also a small picture of an important cycle on earth: the carbon cycle. describe how the carbon gets into this food web. a) bacteria and fungi, the decomposers, recycle carbon from dead organisms. b) carbon is found in the grass and is passed from one level to the next in this food web. eliminate c) all living things give off carbon dioxide as a by-product of respiration and it is released into the atmosphere. d) plants use carbon dioxide as a reactant in photosynthesis, to make usable chemical energy in the form of a sugar.