Enzymes and Trascription

[kryptonxenon]

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I have two different questions:
1) Do most enzymes in the body only cleave L-amino acids?

2) How many phosphates are attached to the first ribonucleotide when transcription begins. The answer is 3 phosphates. Is this because a NTP molecule has 3 phosphates attached to it at the 5' end?

 

[aldol16]

1) Do most enzymes in the body only cleave L-amino acids?

Yes, because those are the amino acids we evolved to use.

2) How many phosphates are attached to the first ribonucleotide when transcription begins. The answer is 3 phosphates. Is this because a NTP molecule has 3 phosphates attached to it at the 5' end?

Well, the "TP" means "triphosphate" and you need all three phosphates because you need the energy stored in those bonds to drive the process forward.