What ensures that the correct amino acid is added during translation?
A) the anticodon of a properly formed aminoacyl tRNA
B) the methyl-guanosine cap of a properly modified mRNA
C) the poly-A tail of a properly modified mRNA
D) the twisting number of a properly supercoiled DNA
Answer: A
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Adult insects exchange respiratory gases primarily by means of:
a. spiracles only b. tracheal tubes and spiracles c. lungs d. gills e. body surface
The ATP synthase complex associated with the thylakoid membrane
A) contains a CF1 proton channel and a CFo ATPase complex. B) is identical to the FoF1 complex of mitochondria. C) performs photophosphorylation in oxygenic phototrophs. D) is a soluble enzyme complex peripherally associated with PSI. E) accepts electrons from PSI.
Small molecules and ions can pass through gap junctions.
a. true b. false
A couple has two female children. The probability that their next child will be male will be 35%.
a. true b. false