Once an RNA molecule has been made from DNA, it enters the cytoplasm of the cell where it is used by the cell to produce a
A) fat.
B) cell membrane.
C) carbohydrate.
D) nucleus.
E) protein.
E
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Chemokines are a group of small proteins that
A) attract T cells to sites of injury. B) function as chemoattractants for phagocytes and lymphocytes. C) potentiate specific immune responses. D) attract T cells, phagocytes, and lymphocytes, as well as potentiate specific immune responses.
Electrons move between PSII and PSI via __________
A. cytochrome b6f B. water C. chlorophyll D. NADP+ E. NADPH
An embolus could block blood flow to the ________, resulting in a myocardial infarction, or it may block blood in the ________ and cause a stroke
A) brain; kidney B) liver; kidney C) heart; brain D) brain; heart E) heart; kidney
Modern restoration biologists recognize that it may not be prudent to restore the same species to an ecosystem that has been disturbed. Which of the following statements and or explanations supports this?
A. Restoring an ecosystem should involve rebuilding the systems that allowed the habitat to successfully operate. B. Restoring an ecosystem requires a replica of the original state, this version of restoration is called "pristine." C. Due to global warming certain species may no longer flourish in the ecosystem. D. Often we do not have a full list of species that made up the original ecosystem.