The terminator versus anti-terminator function of the T box-based riboswitch used by Gram-positive bacteria to regulate amino acid-related genes is determined by
A. the binding of the T box binding protein.
B. the utilization of the appropriate sigma factor by RNA polymerase.
C. the rate of leader peptide synthesis.
D. the binding of the appropriate uncharged tRNA.
Answer: D
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What becomes of the polar bodies formed during oogenesis?
A. They degenerate. B. They fertilize the egg. C. They become the follicle cells that surround the egg. D. They differentiate into sperm. E. They form the zona pellucida.
Which of the following statements about the cyclic pathway is false? a. In the cyclic pathway, electrons moving through the ETC power the pumping of hydrogen ions into the thylakoid compartment
b. In the cyclic pathway, electrons lost from the photosystem are returned to it. c. The cyclic pathway involves type I photosystems but not type II photosystems. d. The cyclic pathway produces ATP and NADPH.
Dotting the abyssal plain are abyssal hills that rise up to:
a. 100 meters. b. 500 meters. c. 1000 meters. d. 1500 meters. e. 4000 meters.
Which of the following would not be found exclusively in the benthic environment?
a. coral reefs b. clams and oysters c. kelp d. eel grass e. nekton