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
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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
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.
Activated thrombin makes this protein change
A) agglutinate B) plasmin C) prothrombin D) fibrinogen
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