{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Protein1 - the metabolic reactions of the cells(enzymes...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Proteins Proteins are composed of long strings of amino acids. The amino acids found in a protein determine its structure and function. Which and in what sequence amino acids occur within a protein will determine what shape the protein assumes. Normal cellular activity (for instance, activation by a hormone ) can change the shape of a protein and therefore change its function (turning it on or off). Loss of homeostasis can also alter the shape of proteins in a way that is detrimental to the cell. Proteins do the work of the cell. They provide structure (collagen and keratin), allow communication between cells or organs (hormones, neurotransmitters and receptors), provide for movement (actin and myosin), allow cells to transport substances into or out of the cell (channels, carriers and pumps), allow recognition and protection (antibodies), and speed up all
Background image of page 1
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: the metabolic reactions of the cells (enzymes). Nucleotides Nucleotides are macromolecules that are composed of sugars , phosphates and nitrogenous bases . The most famous nucleotide is DNA . DNA is the genetic material that is inherited from parents and determines what traits their offspring will display. However, it is only genetically important during mitosis . More importantly, DNA carries the instructions for the proteins that are produced by a cell and therefore determines what that cell looks like (structure) and what functions the cell performs. RNA is another nucleic acid and serves as an intermediary in the production of proteins. ATP is produced during glycolysis and aerobic cellular respiration and is the universal energy molecule of the cell....
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online