All of the following statements about the gram- outer membrane are true EXCEPT:
a. It contains lipids also known as endotoxin.
b. It contains lipopolysaccharides.
c. It is part of the gram- cell wall.
d. It has a thick layer of peptidoglycan
Answer: d. It has a thick layer of peptidoglycan
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The only group of oxygenic phototrophic bacteria are the
A) green nonsulfur bacteria. B) Chloroflexi. C) Cyanobacteria. D) Chlorobi.
Phytoestrogens in plants
a. increase the production of megaspores. b. function in the production of eggs. c. increase the speed at which pollen tubes reach the egg. d. aid in the nuclear fusion of egg and sperm. e. have nothing to do with plant reproduction.
paracrine signals use ________ for communication
Fill in the blank(s) with the appropriate word(s).
Which process leads to a net movement of uncharged molecules from a low concentration to a higher concentration?
a. active transport b. osmosis c. facilitated diffusion d. exocytosis