Which bacteria gram positive or negative have the extra plasma membrane?
a. gram-positive
b. gram-negative
c. both a. and b. are correct
d. none of the above
a. gram-positive (The cell wall consists of several layers of peptidoglycan. Running perpendicular to the peptidoglycan sheets is a group of molecules called teichoic acids which are unique to the Gram-positive cell.)
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Populations can be described in terms of their diversity and stability
Indicate whether the statement is true or false.
HeLa cells have been used in research to
a. identify viral strains. b. investigate cancer. c. study the effects of radiation on cells. d. develop tissue culture techniques that produced a polio vaccine. e. all of these.
What is the raw material for evolution?
What will be an ideal response?
Photorespiration occurs when rubisco reacts RuBP with
A) CO?. B) O?. C) glyceraldehyde 3-phosphate. D) 3-phosphoglycerate. E) NADPH.