In experiments with HeLa cells, you discover that a new chemical agent blocks cell growth by inhibiting protein synthesis. Describe where in the cell the drug is most likely having an effect
What will be an ideal response?
Since new proteins are produced on ribosomes, the agent is most likely acting where these organelles are located. Ribosomes predominantly occur as free floating in the cytoplasm and on the surface of rough endoplasmic reticulum.
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Immunity results from the actions of cells that circulate throughout the body, primarily through the blood and lymph
Indicate whether the statement is true or false.
Cartilaginous fish (chondrichthyes):
A. have well-developed kidneys. B. may have teeth made of bone. C. are generally freshwater species. D. have a swim bladder.
The hindbrain includes the
a. thalamus. b. pineal gland. c. cerebellum. d. medulla. e. cerebellum and medulla.
Why do ionic substances such as NaCl dissolve so readily in water?
A) NaCl is a very dry powder, and the water is able to soak into the salt. B) The sodium ions repel the negative end of the water molecule. C) Water molecules form spheres of hydration around the sodium and chloride ions. D) The charged ends of the water molecules are able to surround the oppositely charged salt ion. E) Both C and D