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What does the plasma membrane look like in a cell?

The plasma membrane in a cell is a thin, flexible barrier made up of lipids and proteins. It has a phospholipid bilayer structure, with proteins embedded within it. This membrane surrounds the cell and controls the movement of substances in and out of the cell.


The protein fibers of the bone matrix are composed of?

The protein fibers of the bone matrix are mainly composed of collagen, which provides strength and flexibility to bones. These fibers are embedded in a mineralized matrix made of calcium and phosphate crystals, which contribute to the hardness and rigidity of bones.


A structure in the cytoplasm where proteins are made?

Proteins are synthesised by ribosomes. The instructions from DNA are copied onto mRNA (transcription). These instructions are then read to create a sequence of amino acids, a polypeptide/protein.


Barrier between the inside of the cell and it's environment?

Cell membrane serves as a barrier between the inside of the cell and its environment. It controls the movement of substances in and out of the cell, allowing it to maintain internal conditions necessary for survival. The cell membrane is made up of a phospholipid bilayer with embedded proteins that help regulate transport and communication.


What are cell walls of plants and fungi made of?

Plant cell walls are composed of cellulose fibres that are connected by hemicellulose fibres and embedded in a matrix of pectin. Lignin is also part of the cell wall. Special kinds of polymers include callose, suberin, that are present in some cell walls, but not all. Plants also have many glycoproteins embedded in the cell wall. Fungal cell walls are composed of chitin, beta-glucan polymers and manno-proteins.