One of the roles of blood is to transport nutrients around the body and deliver molecules such as sugars and lipids to cells. A scientist makes the observation that since blood is composed of water, sugars tend to dissolve, while lipids aggregate. Which of the following claims would be the most useful way for scientists to explain this phenomenon? Smaller and simpler molecules such as sugars tend to dissolve, while larger and complex molecules such as lipids aggregate out. When water is heated, it takes less heat to dissolve sugars than it does to dissolve lipids. Water molecules stay close together as a result of adhesion, while lipids aggregate out as result of cohesion. Water dissolves some molecules while causing the aggregation of others because of hydrophobic and hydrophilic interactions.

In familial hypercholesterolemia individuals homozygous for the allele causing the disorder completely lack receptors on liver cells that take up cholesterol from the blood stream. heterozygous have one-half the number of receptors while individuals homozygous for the normal allele are phenotypically normal. this is an example of a.epistasis b.complete dominance c. incomplete dominance d. codominance

Awoman whose sister tested positive for a specific mutation in the brca1 gene, which increases the risk for breast and ovarian cancer, is found not to have that mutation but does have a mutation of unknown significance near the known mutation site. how should this woman be counseled? select one: a. she should be informed that her risk for breast cancer is greater than the general population but not as great as her sister’s risk. b. she should be informed that because she does not have the mutation, her risk for breast cancer is not greater than that of the general population. c. she should be informed of her gene mutation status and be presented with all the available prophylaxis options and reconstruction options. d. she should be informed that she does not have the specific mutation but that because another mutation is present she should be vigilant about screening

2points what do bacteria have in common with the cells of other living organisms?