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
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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)
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
Light-independent reactions occur in the ____
a. cytoplasm b. chloroplast outer membrane c. thylakoid membrane d. stroma e. matrix
In the trp operon, where is the attenuator region located?
What will be an ideal response?