Complement proteins can form a system of proteins that create a pore in the membranes of bacteria. This system is called the ____________________
Fill in the blank(s) with correct word
membrane-attack system
MAC
membrane attack system
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Answer the following statements true (T) or false (F)
1. A bacterial infection such as pneumonia is most likely caused by organisms derived from the animal kingdom. 2. All genetic mutations are harmful to an organism. 3. Vertical evolution, whereby living organisms evolve from a common ancestor ("tree of life"), is the only mechanism of evolution on Earth. 4. The effects of a genetic mutation are always limited to simply a change in DNA sequence with little consequence on the proteins expressed. 5. The proteome, rather than genome, is most directly responsible for the structure, function, and appearance of organisms.
At the start of both experiments, the bacteria were
a. evenly distributed throughout the chamber. b. clustered on the algal filament. c. clumped along certain areas of the algal filament. d. actively avoiding the algal filament.
The damage caused by ultraviolet radiation is
A) Repaired during transcription. B) Never repaired. C) Cut out and replaced. D) Repaired by DNA replication. E) Repaired during translation.
What were the Ediacaran fauna?
A) organisms that seem to be the first life on Earth B) symbiotic organisms that evolved into cellular organelles C) the first multicellular organisms found in the fossil record D) the most ancient ancestors of organisms in kingdom Protista