Which of these statements is not true of antibody molecules?
A) Cell-bound antibody molecules can bind cells that in turn release chemical compounds that damage parasitic worms.
B) Antibody molecules can enhance phagocytosis of the antigen.
C) Cell-bound antibody molecules can initiate a process that results in cell lysis.
D) Cell-bound antibody molecules can bind complement, triggering the complement cascade.
E) Antibody molecules can directly destroy antigen.
Ans: E) Antibody molecules can directly destroy antigen.
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The suffix -itis means ________.
A. blood B. a disease or morbid process C. pertaining to D. tumor E. an inflammation
What is the most effective way of killing Staphylococcus in the food you are preparing?
A) Nothing; this organism never is spread in food. B) Mix antibiotics in with the food. C) Cook the food thoroughly. D) Use a good antiseptic on the food itself before preparing it.
Which of the following is used in both food production and industrial fermentation?
A. Bacillus thuringiensis B. Escherichia coli C. Listeria monocytogenes D. Pseudomonas syringae E. Saccharomyces cerevisiae
Match the type of phenotypic change below with the type of genetic change most likely to cause it. Each type of genetic change may be used more than once, or may not be used at all
Phenotypic changes: 1. A protein normally localized in the nucleus is now localized in the cytoplasm. _________ 2. A protein acquires a DNA-binding domain. _________ 3. Tandem copies of a gene are found in the genome. _________ 4. A copy of a bacterial gene is now found integrated on a human chromosome. _________ 5. A protein becomes much more unstable. _________ 6. A protein normally expressed only in the liver is now expressed in blood cells. ________ Types of genetic change: A. mutation within a gene B. gene duplication C. mutation in a regulatory region D. exon shuffling E. horizontal gene transfer