Passive immunotherapy is used when
A) the attenuated live vaccine is too difficult to produce.
B) the pathogen does not produce a toxin.
C) the microorganism can be genetically manipulated.
D) protection against a recent infection or disease is needed immediately.
E) a representative antigen for the microbe cannot be isolated.
D
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What encodes the toxin paramecin in Paramecia aurelia?
A. mtDNA B. cpDNA C. Nuclear DNA D. Kappa particles
Which of the following statements concerning the auxin F-box protein is FALSE?
a. It is located in the nucleus. b. It is a type of receptor. c. It is involved in catalyzing the addition of ubiquitin tags. d. Plants have about 700 of them. e. An example is the transport inhibitor response 1 protein.
What is a neuronal attribute that contributes to the resting membrane potential?
a. Potassium is kept at a high concentration outside the cell compared with the inside. b. Sodium is kept at a high concentration inside the cell compared with the outside. c. Neurons are more permeable to sodium than they are to potassium. d. The cytosol contains large molecules that have a net positive charge. e. The cytosol contains large molecules that have a net negative charge.
Cephalization is
A. concentration of the sensory organs on the anterior end of the body. B. embryonic development of the head in advance of the rest of the body. C. a malformation of the head. D. an evolutionary degeneration of the head as seen in some parasites. E. concentration of the sensory organs on the posterior end of the body.