When a B or T cell is primed by an interaction with its particular antigen, the cell ________
A) dies, killing the antigen
B) engulfs the antigen and destroys it
C) grows, divides, and develops further
D) sticks to other cells with attached antigens to form a large clot
C
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Which type of plant hormone was first discovered in experiments to define the nutrient media required
for plant tissue culture?
a. gibberellins b. cytokinins c. salicylic acid d. auxins e. brassinosteroids
Which statement is TRUE?
A) Coenzymes and prosthetic groups both bind tightly to their respective enzymes. B) Prosthetic groups bind tightly to their respective enzymes. C) Coenzymes bind tightly to their respective enzymes. D) Coenzymes and prosthetic groups are technically not bound to their respective enzymes. E) None of the above
Which of the following is not one of the three most common causes of bacterial meningitis?
A) Escherichia coli B) Haemophilus influenzae C) Neisseria meningitidis D) Streptococcus pneumoniae
A liver cell responds to insulin by
A) Taking in glucose and converting it to glucagon. B) Taking in glucose and converting it to glycogen. C) Breaking down glycogen and releasing glucose. D) Releasing glucagon. E) Releasing insulin.