Which of the following best describes IgM antibodies?
A. They cause basophils and eosinophils to degranulate.
B. They are the most common type of antibody in the blood during the initial stages of an immune response.
C. They are the antibody class found in body secretions.
D. They interact with phagocytes and NK cells.
E. They can cross the placenta to provide passive immunity.
Answer: B
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Afferent and efferent neurons differ in (select all correct choices):
A. their size. B. their pattern of myelation. C. the directionality of the information they send.
Answer the following statements true (T) or false (F)
1. In an autoclave, microorganisms are killed by ethylene oxide. 2. The goal of disinfection is to kill all microorganisms. 3. It is not possible to culture protozoa in the laboratory. 4. Rapid freezing, using liquid nitrogen, is an excellent method of killing microorganisms. 5. Microorganisms can be killed by direct exposure to ultraviolet light.
Which molecule(s) is/are responsible for delivering the high energy electrons from the citric acid cycle
to the electron transfer system?
a. NADH only b. FADH2 only c. Both NADH and FADH2 d. Cyt C and Q e. ATP and ADP
Which component of transcription or translation has the anticodon?
A) RNA polymerase B) rRNA C) mRNA D) ribosome E) tRNA