1) Describe the differences between embryonic, somatic cell nuclear tranfer, and induced pluripotent stem cells . 2) How does PCR work and why is it useful? 3) Name and describe four evidence of evolution. 4) A population has only two alleles, A and a, for a particular gene. The allele […]

1. Marlene has had lymph nodes removed from her armpit. Why would removal of lymph nodes cause swelling in her hand and arm? 2. Is lymph more similar to blood plasma or to interstitial fluid? Explain your answer. 3. (fill in the blank) Fluid from the legs passes through lymphatic […]

In one day the average person secretes about 2.5 litres of gastric juice into the stomach. The pH of the cells in the stomach lining that perform the secretion is about 7 (the same as for all cells) and the pH of the stomach is about 1. Thus, H+ ions […]

Cholesterol is a structural component of cell membranes. Amount of cholesterol present can affect membrane stability and permeability. What is the role of cholesterol in a membrane? 1 A membrane that needs to be more rigid and more permeable, would have high cholesterol ratios. 2 Membranes with high amounts of cholesterol […]