What are the three advantages of using hormones as messengers rather than nerves to control bodily processes?
What will be an ideal response?
Chemical messengers in the form of hormones can be distributed widely throughout the entire body via the bloodstream at once. They persist longer than nervous impulses. Third, many different types of chemicals can act as hormones, so different tissues can be targeted differently.
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Which of the following statements is true about enzyme-catalyzed reactions?
A) The reaction is faster than the same reaction in the absence of the enzyme. B) The free energy change of the reaction is opposite from the reaction that occurs in the absence of the enzyme. C) An enzyme catalyzes a reaction by raising the activation energy. D) Enzyme-catalyzed reactions require energy to activate the enzyme. E) Enzyme-catalyzed reactions release more free energy than noncatalyzed reactions.
Explain the role of the human genome project and modern medicine in helping to find a cure for cystic fibrosis
What will be an ideal response?
The catabolite repression system in E. coli essentially represses the lac operon when glucose is present. What evolutionary advantage would favor evolution of such a system?
What will be an ideal response?
Which of the following pairings, indicated by letters referring to blood type phenotypes, CANNOT produce a child with type B blood?
a) A x B b) B x O c) O x AB d) AO x AO e) All of the above could produce a child with type B blood.