What rule did Chargaff develop that he shared with Watson and
Crick?
A. Finding what bases were paired together, A to
T and C to G
B. That DNA was the material being transformed
between bacterial cells
C. That mixing a dead harmful bacteria with a
living harmless one can cause transformation
D. That heat could be used to kill bacterial cells

The trp operon in e.coli regulates genes that code for enzymes required for synthesis of the repressible operon. when tryptophan is not available amino acid tryptophan. the trp operon is a in the environment, the trp repressor protein activeinactiveregulated. therefore, rna polymerase can bind to the genes to begin transcription.

Melting glaciers is a serious threat to the environment what is the possible consequence of melting glaciers on polar bears?

What happens as electrons move along the chain of molecules known as the electron transport chain? they gain energy, which causes atp molecules to lose phosphate groups. they gain energy, which causes h *ions to join with oxygen to produce water. they lose energy, which is then used by the cell to make atp. they lose energy, which is then used to break down atp.