Which of the following is the main component of the plasma membrane?

a. cholesterol
b. phospholipids
c. proteins
d. carbohydrates


b. phospholipids

Biology & Microbiology

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Given what is known about the minimal essential functions of cellular life, if you could create an artificial cell, what cellular structures must you include?  

A.  cell wall B.  ribosomes C.  mitochondria D.  nucleus

Biology & Microbiology

Most carbohydrates manufactured in leaves and other photosynthetic parts are transported through the phloem to the rest of the plant by the process of  

A.  transpiration. B.  translocation. C.  osmosis. D.  receptor-mediated transport. E.  turgor pressure.

Biology & Microbiology

Which of the following is incorrect about blood cells?

A. They include glial cells. B. They include leukocytes that are either granulocytes or agranulocytes. C. They develop from undifferentiated stem cells. D. After birth, they are produced in red bone marrow sites. E. They include erythrocytes that, when mature, lose their nuclei.

Biology & Microbiology

Which of the following is NOT considered a coniferous tree?

A. spruce B. pine C. maple D. fir E. hemlock

Biology & Microbiology