What is recognized by an aminoacyl trna synthetase?

The correct answer is: amino acid and tRNA(s) that correspond to that amino acid.

Aminoacyl-tRNA synthetase is an enzyme important for the process of translation (protein synthesis) because it attaches the amino acid onto its appropriate tRNA and forms aminoacyl-tRNA. There are 20 different aminoacyl-tRNA synthetases in humans, one for each amino acid of the genetic code and all of them use ATP as energy source for their function. After the aminoacyl-tRNA is formed, ribosome can transfer the amino acid from it onto a growing peptide (newly synthesized peptide, future protein).

one characteristic that is shared by all is a soft body. many

of these invertebrate animals also have an outer shell to protect their

body. oysters, clams, snails, and mussels are all mollusks. so are octopuses, squids, and slugs. mollusks live on land and in freshwater.

enzyme active site and substrate specificity

enzymes bind with chemical reactants called substrates. there may be one or more substrates for each type of enzyme, depending on the particular chemical reaction. in some reactions, a single-reactant substrate is broken down into multiple products