A mutation that affects Ca++ binding to calmodulin is most likely to interfere with what aspect of a signal transduction pathway?
A. The cellular response to the second messenger
B. G protein activity
C. The MAP kinase cascade
D. The flow of Ca++ ions through ion channel receptors
Answer: A
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Which of the following statements about quaternary structure is not correct?
A. A homotrimer consists of three identical protomers. B. Identical polypeptides can create a functional protein. C. A ribosome can be considered an oligomer. D. All functional proteins have a quaternary structure. E. Less DNA is required to code for a 70,000 molecular weight homotrimer than a 70,000 molecular weight homodimer.
Which of the following strategies of sexual reproduction will result in the most genetic diversity?
A. Sexual reproduction of homothallic species B. Sexual reproduction of heterothallic species C. Sexual reproduction via arthroconidia D. Sexual reproduction via sporangiospores
If auxin transport was limited at shoot tips, what would occur?
A. It would have no effect on leaf formation. B. It would result in increased formation of leaf primordia at many locations. C. Leaf primordia formation would be limited to the cells where auxin was transported. D. No new leaves would form.
Temperature, salinity, and sediment composition are all examples of what?
a. Abiotic factors b. Environment c. Anaerobic factors d. Biotic factors