Chargaff's rule explains that: The amount of Cytosine in a sample of DNA is equal to the amount of Guanine.
The amount of Thymine in a sample of DNA is equal to the amount of Cytosine.
The amount of Adenine in a sample of DNA is equal to the amount of Guanine.
The amount of Uracil in a sample of DNA is equal to the amount of Adenine.

Imagine that certain laws of physics could be ignored and you were able to travel vast distances in moments. now imagine that you traveled to an earth-like planet located light-years away that is known to support life. think about what you’ve learned in this unit and make an argument for what you think would be the dominant type of life form on this planet. consider whether a notochord is required for an organism to manipulate its environment and become a dominant creature.

The small molecule cyclic amp (camp) takes about 0.2 second to diffuse 10 μm, on average, in a cell. suppose that camp is produced near the plasma membrane on one end of the cell; how long will it take for this camp to diffuse through the cytosol and reach the opposite end of a very large cell, on average? assume that the cell is 200 μm in diameter.

Identify two examples of chemical reactions that you have encountered during the last week. identify an exothermic and endothermic reaction. explain.