How many coding codons are there?
a. 4
b. 20
c. 30
d. 60
e. 64
D
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Were dominant and recessive traits observed equally in both gametophytes and sporophytes of C-ferns? Expect about a 1:1 phenotypic ratio. How did you determine which character was dominant and which was recessive?
What will be an ideal response?
S. pyogenes associated with invasive disease characteristically have
A. leukocidins. B. coagulase. C. streptococcal pyrogenic exotoxin A. D. streptococcal pyrogenic exotoxin B. E. streptococcal pyrogenic exotoxins A AND B.
Extra protective behaviors toward young may have evolved from a common ancestor in evolutionary lines leading to the:
A) dinosaurs, turtles, and lizards. B) mammals, turtles, and snakes. C) crocodiles, dinosaurs, and birds. D) turtles, snakes, and lizards. E) amphibians, lizards, and fish.
Feedback inhibition is best described as
A. substrate binding to enzyme in noncompetitive site. B. product binding to enzyme in noncompetitive site. C. product binding to DNA, blocking enzyme transcription. D. substrate binding to DNA, blocking enzyme transcription.