Explain how the destruction of the original tropical forests will affect the development of new medicines
What will be an ideal response?
More than 25% of the prescription medicines in the United States contain chemicals that came from medically important plants. Important medicines, such as aspirin and digitalis, were discovered in plants that had been used as folk remedies. The majority of plant species are in tropical forests. Deforestation will result in the loss of many plant species, and humanity will have no way of knowing what potential new medicines are being destroyed.
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Which is TRUE about amphipathic molecules when placed in an aqueous solution?
A. The interior portion is composed of hydrophilic hydrocarbon chains. B. The outside portion is composed of hydrophilic head groups. C. The interior portion is composed of hydrophobic hydrocarbon chains. D. The interior portion of the micelle is composed of hydrophilic hydrocarbon chains and the outside portion of hydrophilic head groups. E. The interior portion is composed of hydrophobic hydrocarbon chains and the outside portion of hydrophilic head groups.
When membrane proteins on an olfactory neuron are stimulated by the binding of a specific chemical, what is the immediate result?
A. membrane depolarization B. membrane repolarization C. active ion transport D. membrane hyperpolarization E. neurotransmitter release
A water concentration gradient is influenced by the number of solute molecules present on both sides
of the membrane.
Indicate whether the statement is true or false.The energy for translocation during translation comes from
a. formation of the peptide bond. b. breaking of bonds between tRNA and mRNA. c. breaking of bonds between mRNA and the ribosome. d. removal of a tRNA from the E site. e. hydrolysis of GTP.