Why is Chagas' disease important?
a. It can cause chronic infects of the heart and digestive system
b. It is associated with staph infections
c. It causes birth defects
d. All of the above
Ans: a. It can cause chronic infects of the heart and digestive system
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Why might adding inorganic phosphate, to a reaction mixture where glycolysis is rapidly proceeding, help sustain the metabolic pathway?
A) It would increase the amount of glucose available for catabolism. B) It would increase the oxygen supply available for aerobic respiration because each phosphate group contains four oxygen atoms as constituents. C) The metabolic intermediates of glycolysis are phosphorylated. D) It increases the energy level of the electrons that are transferred to the electron transport chain where ATP is produced.
Evidence that black walnut trees exhibit allelopathy includes
A. the lack of vegetation growing under black walnut trees. B. the death of hornworms that try to eat black walnut leaves. C. the symbiotic relationship the trees have with fungi. D. the ants that protect the trees from herbivory. E. the morphological changes that occur in response to pathogenic attacks.
The multidrug resistant pumps in many bacterial cell membranes function by
A. synthesis of enzymes that alter drug structure. B. removing the drug from the cell when it enters. C. bacterial chromosomal mutations.
Spatial summation occurs when
a. several neurons in an area fire at one time. b. neurons fire repeatedly until a stimulus is sent. c. they are too weak to cause an action potential. d. the post-synaptic neuron is stimulated in one location. e. the pre-synaptic neuron fires into many post-synaptic neurons.