Dr. Rebecca Lancefield used which o the following in her classification of the Streptococci?

A. The haemolytic pattern of the bacteria
B. The C-carbohydrate antigen in the cell wall
C. The M protein
D. The M-like protein
E. The F protein


Ans: B. The C-carbohydrate antigen in the cell wall

Biology & Microbiology

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To best isolate mutant bacteria that are threonine auxotrophs from a larger population, threonine-rich media should be inoculated and any colonies that form are presumptive auxotrophic mutants.

Answer the following statement true (T) or false (F)

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According to the intermediate disturbance hypothesis, species richness is greatest in communities that experience

____.

a. rare moderate disturbances b. high temperatures c. frequent severe disturbances d. frequent moderate disturbances e. rare intense disturbances

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Light-independent reactions occur in the ____

a. cytoplasm b. chloroplast outer membrane c. thylakoid membrane d. stroma e. matrix

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In the trp operon, where is the attenuator region located?

What will be an ideal response?

Biology & Microbiology