Which of the following best explains the chemical nature of the substrate as it relates to the enzyme's active site and functioning? A) The shape and charge of the substrate need to match enzyme active site for binding, activation, and catalysis.
B) The pH of the substrate must be compatible with an enzymes active site for binding, activation, and catalysis
C) The substrate and enzyme must have identical bonds for binding, activation and catalysis to occur
D) The size of the substrate needs to match an enzyme active site for binding, activation and catalysis

The human genome project is devoted to mapping the general dna sequence of our species. this could lead to the development of new medicines, as well as the possibility of using gene therapy to treat certain diseases. however, there are some ethical issues surrounding the mapping of individual genomes. one concern is a) that your genes may change over time, making the project useless. b) that insurance companies could discriminate based on genetic make-up. c) that since this has never been done before, we should probably not do it now. d) that sequencing our individual genomes is so expensive, it is a counter-productive strategy.

Explain how scientists use geologic time to determine the age of landforms.

Suppose you could go back in time to interview henri becquerel on the day he discovered radioactivity. from his perspective, write an account of the discovery.