ome enzymes do not work properly or at all without the presence of a cofactor or coenzyme. Which of the following is a class of known important coenzymes?
a. hydroxides
b. amino groups
c. vitamins
d. assistins
c. vitamins
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To create a knockout mouse, after introducing to ES cells a DNA construct in which a specific gene is mutagenized by the insertion of a drug resistance marker, the cells
A) that have incorporated the transgene by homologous recombination grow in the presence of the drug and these are injected into a host blastocyst. B) that lack the transgene grow in the presence of the drug and these are injected into a host blastocyst. C) that have deleted the transgene grow in the presence of the drug and the nuclei are injected into a host blastocyst. D) that lack the transgene grow in the presence of the drug and the nuclei are used for nuclear transfer.
Fats that your body cannot make are called____
a. essential fatty acids b. triglycerides c. phospholipids d. saturated fats e. sterols
If a person is bitten by a highly venomous snake and receives a dose of venom sufficient to kill several people, that person does not have the time to build up his immunity over the next week to neutralize the venom. However, hospitals carry "antivenin" made from injecting horses with small-to-larger dosages of snake venom, and then harvesting the antibodies from the horse plasma. This is an example of
A. passive immunity. B. receiving high levels of complement. C. receiving high levels of interferon. D. developing an inflammatory response to increase the IgG production. E. active immunity.
The ability to produce (hyaluronidase/lipase/proteases) enables Staphylococcus aureus to penetrate and spread through tissues.
Fill in the blank(s) with the appropriate word(s).