Examlex
Which of the following statements about a trial balance is true?
Membrane
A biological barrier that controls the passage of substances in and out of cells and organelles.
Receptor
A protein molecule that receives chemical signals from outside a cell.
Tertiary Structure
Refers to the three-dimensional shape that a protein assumes after it folds, contributing to its functional properties.
Polypeptide Chains
Long chains of amino acids linked by peptide bonds forming part of protein structure.
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