Please match the virulence factor of Streptococcus pyogenes to its description.
Streptokinase
A) Surface antigen that serves as the basis for alphabetical grouping; protects bacterium from lysozyme
B) Toxin that causes beta-hemolysis on blood agar and injures cells of the host
C) Enzyme that plays a role in invasion by leading to the digestion of fibrin clots
D) Projecting surface antigen that facilitates adherence and resists phagocytosis
E) Chemical surface layer that prevents an immune response by the host
F) Enzyme that promotes invasion into tissues by breaking down the binding substance in connective tissues
C) Enzyme that plays a role in invasion by leading to the digestion of fibrin clots
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Compared to the less developed countries, the highly developed ones have a higher _____
a. death rate c. total fertility rate b. birth rate d. resource consumption rate
All of the products of the light-dependent
reactions of photosynthesis listed below are used in the light-independent reactions EXCEPT for a. O2. b. electrons. c. NADPH. d. ATP. e. hydrogen protons contributed by NADPH.
Around 1914, ________ determined that DNA was an important component in ________ by using a staining technique that is still in use today
Fill in the blank with correct word.
Which of the following is the best description of an atom's physical structure?
A) An atom is a solid mass of material. B) The particles that form an atom are equidistant from each other. C) Atoms are little bubbles of space with mass concentrated at the center of the bubble. D) Atoms are little bubbles of space with mass concentrated on the outside surface of the bubble.