Identify the structure indicated by the letter “B” in
the internal environment.
a. tight junctions
b. adhering junctions
c. gap junctions
d. homeostatic junctions
e. none of these
Answer: b
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If a viral gene prevents peptidoglycan units from being linked to lipid carriers, what will happen to the bacterial cell?
A. The cell wall will weaken, eventually leading to cell lysis. B. Lipid metabolism will become impaired. C. The cell wall with become stronger leading to virus to enter the lysogenic cycle. D. The bacterial cell will start to take on the properties of a Gram Negative cell.
Flimmer filaments
A. function to move cells on solid surfaces. B. are components of all eukaryotic flagella. C. permit flagella to pull rather than push the cell. D. None of the choices are correct.
Polar bears are top predators, and tests on their
tissues have shown a surprising a. resistance to warming. b. amount of protein. c. resistance to disease. d. amount of mercury and organic pesticides. e. evidence of none of these
Of the three pathways for obtaining ATP for muscle contraction, which one requires oxygen?
A. only the creatine phosphate pathway B. only respiration C. only fermentation D. fermentation and respiration E. the creatine phosphate pathway and fermentation