You are a doctor who examines a swollen and warm puncture wound on the hand of a patient. Because the wound was made by a rusty nail, you are concerned about infection by Clostridium tetani bacteria, which cause tetanus
You are relieved to see that the patient
received a tetanus vaccine at her last checkup. The vaccine ____________.
A. exposed the patient to C. tetani so that she
contracted a mild version of tetanus.
B. exposed the patient to deactivated C.
tetani, so that her B cells would produce
antibodies to the bacteria with minimal risk of
contracting the disease.
C. stimulated the production of mast cells by
her bone marrow.
D. exposed the patient to other types of
bacteria, so that her immune system would
be prepared for infection by prokaryotes.
B
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Which of the following types of molecules are most important for a cell to protect from damage if the
cell is to stay alive and reproduce?
a. proteins b. lipids c. nucleic acids d. carbohydrates e. amino acids
An animal cell placed in a hypertonic solution will swell and perhaps burst
Indicate whether the statement is true or false.
The flower color trait in radishes is an example of which of the following?
A) A multiple allelic system B) Sex linkage C) Codominance D) Incomplete dominance E) Epistasis
Enzymes:
a. sometimes increase the amount of energy necessary to initiate a reaction. b. increase the rate at which a reaction occurs. c. reduce the energy released by a reaction by one of four different mechanisms. d. catalyze reactions that release energy, but not those that consume energy. e. are always consumed by catalyzing a reaction.