The K+ channel is an example of a transmembrane protein (a protein that spans the phospholipid bilayer of the plasma membrane). What types of amino acids are likely to be found (a) lining the channel through which K+ passes; (b) in contact with the phospholipid bilayer containing fatty acid; (c) […]

Discoveries in DNA, cell biology, evolution, biotechnology have been among the major achievements in biology over the past 200 years with accelerated discoveries and insights over the last 50 years. Consider the progress we have made in these areas of human knowledge. Present at least three of the discoveries you […]

Q. Fibrinopeptides (proteins involved in the blood clotting, among other functions) are called to have high amino acid substation rates. Suppose that the average per amino acid site substitution rate in mammalian fibrinogen b (roughly 600 amino acids long) is one substitution every 10 million years. If humans and shrews […]

Question: A soybean mutant exhibiting a tan colored seed coat was recently identified. Crossing the mutant with the the wild-type,yellow-seeded soybean plant gave all yellow -seeded soybeans in the first generation, F1. Self-pollination of F1 provided in the second generation ,F2,814 yellow seeded and 201 tan-seeded plants.This pattern suggests a simple […]