You identify a molecule in a pizza that is a polymer; has oxygen, hydrogen, and sulfur atoms; and is hydrophilic. What kind of molecule is it?
A) protein
B) carbohydrate
C) nucleic acid
D) lipid
Answer: A
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Evaluate the following statement: Larger organisms do not generally have larger cells than smaller organisms; instead, they have more cells. Is that statement true or false? Explain briefly.
What will be an ideal response?
Results from lab tests reveal abnormally high endogenous hormone levels, and you suspect a possible tumor. What regions will you ask the MRI technician to focus on?
Cushing's syndrome causes weight gain, excessive sweating, and muscle weakness. It can result from either the production of abnormally high levels of cortisol by the body, or overuse of glucocorticosteroid drugs. You are an endocrinologist working with a Cushing's syndrome patient. She is on hormonal birth control pills and takes an occasional ibuprofen. A. hypothalamus, anterior pituitary, and adrenal cortex B. adrenal cortex only C. hypothalamus and posterior pituitary D. anterior and posterior pituitary Clarify Question What is the key concept addressed by the question? What type of thinking is required? Gather Content What do you already know about cortisol? What other information is related to the question? Choose Answer Given what you now know, what information is most likely to produce the correct answer? Reflect on Process Did your problem-solving process lead you to the correct answer? If not, where did the process break down or lead you astray? How can you revise your approach to produce a more desirable result?
Whether or not an enzyme is active and present within a cell depends on all of the following except
A) if the gene for the enzyme has been turned on and the enzyme made. B) if the enzyme has been activated or inactivated by the addition of a phosphate group. C) whether an inhibitor is bound to the enzyme. D) whether the necessary cofactor is present. E) whether the enzyme catalyzes an endergonic or exergonic reaction.
In many dense forests, plants living near the ground level engage in intense competition for
A) oxygen. B) water. C) carbon dioxide. D) sunlight.