The ability of glucose to repress the lac operon depends on which effector molecules?
A. cAMP
B. allolactose
C. starch
D. tryptophan
E. ADP
Answer: A
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Is the regulation of blood sugar levels in the body a negative feedback loop or a positive feedback loop?
A. negative feedback loop B. positive feedback loop
Which structure has cilia that create water currents
and mucous sheets that capture nutrients suspended in the water in filter-feeding chordates? a. notochord b. differentially permeable membrane c. filiform tongue d. gill slits e. jaw
Which of the following statements concerning nucleotide excision repair is FALSE?
a. It is a type of mismatch repair. b. It involves a nuclease. c. It involves a DNA polymerase. d. It involves DNA ligase. e. It is implicated in xeroderma pigmentosum.
The chromosomal heredity material is packaged in this organelle in eukaryotic cells but not in prokaryotic cells. This organelle is:
A. mitochondria B. plasma membrane C. centrioles D. chloroplasts E. nucleus