The genetic code is well described and all 64 possible codons are accounted for. How do cells insert the ‘twenty first' amino acid selenocysteine?
A) It is encoded by one of the extra serine codons.
B) It is encoded by one of the extra leucine codons.
C) It is encoded by one of the extra arginine codons.
D) It is encoded by one of the stop codons.
D
You might also like to view...
An example of artificial selection is the
A) breeding of corn from teosinte. B) observation that some snakes retain tiny, incomplete hind legs. C) evolution of antibiotic-resistant bacteria. D) fact that all mammalian limbs are made up of the same set of bones.
During the Triassic, a number of rift related fault basins formed along the eastern margin of North
America. Indicate whether the statement is true or false.
A ________ occurs when the fault plane forms a low angle relative to the horizontal, resulting in the overlying block being shifted over the underlying
A) lateral fault B) thrust fault C) normal fault D) strike-slip fault
The MAIN source of atmospheric heating is from the ________
A) absorption of ultraviolet energy from the Sun B) conduction of energy from the Earth C) convection of energy from the Earth D) re-radiation of energy from the Earth E) absorption of insolation