Naturally occurring proteins consist exclusively of L-amino acids. Below is the structure of a peptide Ala-Pro-Cis. Which of these amino acids have been drawn as L-amino acids? Ala and Pro

Pro and Cis

Ala, Pro and Cis

Ala and Cis

answer

fusion: the energy source of stars. the energy released from the collapse of the gas into a protostar causes the center of the protostar to become extremely hot. when the core is hot enough, nuclear fusion commences. fusion is the process where two hydrogen atoms combine to form a helium atom, releasing energy.

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