Which biomolecule is most associated with the structure and function of cell membranes?
a. Polysaccharides
b. steroids
c. DNA
d. phospholipids
e. ATP
d
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A patient visits your clinic often with recurrent respiratory infections. Based upon their medical history, it appears they have been an active smoker for over 40 years. Select the statement that most accurately reflects how this information may reveal why the patient is highly susceptible to respiratory pathogens.
A. Smoking directly inhibits B- and T-cell action. B. Smoking can paralyze the ciliary escalator. C. Smoking decreases the activity of neutrophils. D. Smoking decreases the formation and effectiveness of complement proteins.
Which of the following conditions may cause infertility in a human?
A) XYY B) XXX C) XX D) XXY E) XY
The smallest unit of life that can exist as a separate entity is a(n) ___________.
A. cell B. molecule C. organ D. population E. ecosystem
In fungi, aseptate hyphae are coenocytic.
Answer the following statement true (T) or false (F)