In the lac operon, what acts as the inducer?
A) glucose
B) permease
C) allolactose
D) ?-galactosidase
E) transacetylase
C
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Assume the trait for brown eyes is completely dominant to blue eyes and this trait is controlled by a single gene. If 400 people in a population of 10,000 have blue eyes, how many people would be expected to be heterozygous for this trait? (Hint: Use the Hardy-Weinberg formula.)
a. 8,000 b. 5,400 c. 3,200 d. 960 e. 320
Found mostly in marine environments, members of the ____ flatworm lineage are free-living,and acquire food with a
muscular pharynx; most are hermaphroditic.
a. Trematoda b. Turbellaria c. Polychaeta d. Cestoda e. Hirudinea
When blood flows through pulmonary capillaries, it picks up ___ and releases ___
a. carbon dioxide; carbon dioxide b. carbon dioxide; oxygen c. oxygen; oxygen d. oxygen; carbon dioxide e. oxygen or carbon dioxide; either
Peptidoglycan is a compound in ____
a. bacterial flagella b. bacterial cell walls c. archaean cell walls d. archaean flagella e. eukaryote cell walls