(Q).
Answer the following question given this paragraph: Because of the link between high levels of cholesterol and heart disease, it is commonly seen by the general public as a "bad" molecule. However, cholesterol plays a vital role in the body, as both a structural component of cell membranes and a metabolic precursor to various steroid hormones. Only about 30% of the cholesterol in our bodies comes from our diet; the rest is synthesized in the liver, intestines, adrenal glands, and reproductive organs. The same acetyl CoA molecule that provides biochemical energy can also be used by the body to synthesize cholesterol. There are approximately twenty-two steps involved in the formation of cholesterol from acetyl CoA. Q: What molecule can be used by the body to synthesize cholesterol ? Choices: - ethylene coa - hydroxide coa - chloride coa - acetyl coa A:
(A).
acetyl coa

(Q).
Answer the following question given this paragraph: An n-type (negative-type) semiconductor consists of silicon and an element such as phosphorus that gives the silicon crystal extra electrons. You can see this in the Figure above . An n-type semiconductor is like the negative terminal of a battery. Q: Silicon with an element that gives it extra electrons is which type of semiconductor? Choices: - m. Type - i.g - type - k. - type - n-type A:
(A).
n-type

(Q).
Answer the following question given this paragraph: Magma collects in magma chambers beneath Earth's surface. Magma chambers are located where the heat and pressure are great enough to melt rock. These locations are at divergent or convergent plate boundaries or at hotpots. Q: What area beneath the earth's surface do magma collects? Choices: - hot chambers - underneath chambers - erosion chambers - magma chambers A:
(A).
magma chambers