A researcher runs a BLAST program comparing turkey phenylalanine hydroxylase, which functions in the metabolism of phenylalanine, with known database sequences. Which of the following should provide the closest match?
A. green pufferfish
B. zebrafish
C. chicken
D. orangutan
E. fruit fly
C. chicken
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Huntington disease in humans is an example of a(n) ____________
A. essential gene B. lethal allele C. semilethal allele D. nonessential gene E. conditional lethal allele
Which of the following is true of predation?
a. A predator exerts selective pressure on its prey. b. A prey exerts selective pressure on its predator. c. In a typical predation case, the predator would not kill its prey. d. Feeding on carcasses is also an example of predation. e. Predator and prey exert selective pressure on one another.
tRNA differs from other types of RNA because it _____
a. acts as an enzyme b. is only involved in transcription c. binds to mRNA d. codes for multiple amino acids e. is complexed with a protein
Animals that have a ventral nerve cord during embryonic development are classified as chordates
Indicate whether the statement is true or false