Various cells in the body respond to the hormone epinephrine in various ways due to ________.
A. cellular respiration
B. metabolism
C. phosphodiesterase
D. protein kinases
E. differential gene regulation
E. differential gene regulation
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The biodegradation pathway for benzoate is likely to be subject to induction rather than repression
Indicate whether the statement is true or false.
Rubisco is necessary for
a. capturing light energy. b. carbon cycling. c. producing chlorophyll. d. water absorption.
What might happen if a functional copy of the TP53 gene is not present in a cell?
a) the cell may make no p21 inhibitory protein, preventing the cell from passing the G1 checkpoint and no Bax protein, which would prevent the cell from initiation apoptosis b) all of the choices are correct c) the cell proceeds to S phase before it is ready and before DNA repairs are completed d) abnormal cells with the potential to become malignant are produced
When the London underground (subway) system was built in the nineteenth century, mosquitoes moved into the tunnels and became adapted to biting the customers and small animals that inhabit the subway system. Like people, mosquitoes can freely enter and
leave through the tunnel entrances. Recently, DNA analysis and attempts to cross-breed above-ground mosquitoes with underground mosquitoes indicate that there are now two different species. The underground insects are visibly larger. Which term best describes what has happened? A) behavioral incompatibility B) population bottleneck C) temporal isolation D) sympatric speciation