Which types of cell transport involve the movement of molecules along the concentration gradient from high to low? (select all that apply) * osmosis
facilitated diffusion
diffusion
active transport

The empty trna moves off and picks up another matching amino acid from the cytoplasm in the cell. the anticodon of the trna, with its attached amino acid, pairs to the codon of the mrna, which is attached to a ribosome. this sequence is repeated until the ribosome reaches a stop codon on the mrna, which signals the end of protein synthesis. the ribosome forms a peptide bond between the amino acids, and an amino acid chain begins to form. when a second trna with its specific amino acid pairs to the next codon in sequence, the attached amino acid breaks from the first trna and is bonded to the amino acid of the second trna.

Explain how sequences of amino acids in proteins can be used to reveal relationships among organisms.

What substance acts to prevent sudden ph changes in bodily fluids?