The blood-brain barrier consists of
a. membranes surrounding the neurons of the brain.
b. cells lining the wall of the brain capillaries.
c. vesicles of cerebrospinal fluid.
d. the cerebral cortex.
e. the meninges.
B
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Which of the following is not true of the enzyme–substrate interaction?
A) Many enzymes are extremely specific regarding a substrate. B) Many enzymes cannot recognize a stereoisomer of their substrate. C) Some enzymes accept any of a whole group of substrates. D) Carboxypeptidase recognizes any of the amino acids from the carboxyl end of a polypeptide. E) Cells are often able to carry out metabolic activity with only a handful of enzymes because many are nonspecific.
A bacterium is unable to transport lactose into the cell to be broken down. Which gene is likely mutated in this bacterium?
A) lacZ B) lacY C) lacI D) lacP E) lacO
Test systems involving which of the following has greatly improved the specificity of immunological tests?
A.) Monoclonal antibodies B.) Electronics C.) Enzymes D.) Radioactivity E.) All of these choices are correct.
What would slow the death rate of microbes
What will be an ideal response?