Short, bristle-like structures that extrude from the cell surface are called

A) flagella.
B) pili.
C) mating bridges.
D) fimbriae.
E) cilia.


Answer: D

Biology & Microbiology

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Which of the following statements are TRUE about the structure of hemoglobin? (Select all that apply.)

a. The hemoglobin molecule is a protein made up of four subunits bound together. b. Each of the four heme groups in a hemoglobin molecule contains one atom of iron (Fe2+), to which molecular oxygen binds. c. 2,3 diphosphoglycerate increases hemoglobin's affinity for oxygen. d. The relationship between the percentage of saturation of hemoglobin and PO2 is linear.

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Several molecular forms of the same gene may exist; collectively these forms are termed _____.

A) alleles B) homologous genes C) loci D) mutations E) heterogeneous genes

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In a random study of 1000 wills, it was shown that ___________________ received the smallest share of a deceased's estate.

a) children b) spouses c) siblings d) grandchildren e) friends

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Activated thrombin makes this protein change

A) agglutinate B) plasmin C) prothrombin D) fibrinogen

Biology & Microbiology