PLEASE HELP ME Iodine 131 has a half-life of about 8 days.

A. How long will it take for the radiation of the isotope to go from 100 g to 12.5 g?

B. If a sample of iodine 131 weighed 200 grams initially, how much mass would be remaining after 32 days?

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.

Drag each label to the correct location on the table. each label can be used more than once. decide whether each statement describes saturated fat, unsaturated fat, or both saturated and unsaturated fats.

Most of the carbon on earth is stored in the form of