What is a polymer in biology GCSE?

Addition polymers are made from molecules containing C=C bonds. Polymers have different properties and uses but it is difficult to dispose of them. DNA, starch and proteins are biological polymers.

What is a polymer Edexcel?

A polymer is a substance of high relative formula mass , made up of small repeating units .

What are the 4 biological polymers?

There are four basic kinds of biological macromolecules: carbohydrates, lipids, proteins, and nucleic acids. These polymers are composed of different monomers and serve different functions. Carbohydrates: molecules composed of sugar monomers.

How are polymers made GCSE?

Polymers have very large molecules. They are formed when many small molecules join together. This process is called polymerisation. When alkenes join together to form a polymer with no other substance being produced in the reaction, the process is called addition polymerisation.

Is DNA a natural polymer?

Natural polymers occur in nature and can be extracted. They are often water-based. Examples of naturally occurring polymers are silk, wool, DNA, cellulose and proteins.

Are proteins a polymer?

Proteins are polymers in which the 20 natural amino acids are linked by amide bonds. Structural proteins can be globular or fibrillar proteins.

Are polymers?

polymer, any of a class of natural or synthetic substances composed of very large molecules, called macromolecules, that are multiples of simpler chemical units called monomers. Polymers make up many of the materials in living organisms, including, for example, proteins, cellulose, and nucleic acids.

Which is an example of a biological polymer?

Biopolymers such as proteins and nucleic acids play crucial roles in biological processes. Common synthetic polymers are Bakelite, neoprene, nylon, PVC (polyvinyl chloride), polystyrene, polyacrylonitrile and PVB (polyvinyl butyral). A polymer produced by a living organism is called a biopolymer.

What is an example of a thermosetting polymer?

Common examples of thermoset plastics and polymers include epoxy, silicone, polyurethane and phenolic. Different thermosets provide different advantages when used as a production material. For example, epoxies are highly elastic, tough and resistant to many chemicals while phenolic is highly flame resistant.

Is polystyrene a natural polymer?

Polystyrene (PS) /ˌpɒliˈstaɪriːn/ is a synthetic aromatic hydrocarbon polymer made from the monomer known as styrene. Polystyrene can be naturally transparent, but can be coloured with colourants.

How many Edexcel papers are required for GCSE in biology?

The Pearson Edexcel Level 1/Level 2 GCSE (9– 1) in Biology consists of two externally-examined papers. These are available at foundation tier and higher tier. Students must complete all assessments in the same tier.

How are the monomers of a polymer linked together?

Polymers are large molecules of high relative molecular mass and are made by linking together large numbers of smaller molecules called monomers. Each monomer is a repeat unit and is connected to the adjacent units via covalent bonds.

Where can I find past Edexcel biology papers?

Edexcel GCSE Biology past exam papers. If you are not sure what tier you are sitting foundation or higher check with your teacher. You can download the papers and marking schemes by clicking on the links below. Biology/ Science Unit B1: Influences on Life (5BI1F/01) – Foundation – Download Paper – Download Marking Scheme

How many Pearson Edexcel papers are in GCSE Level 1?

The Pearson Edexcel Level 1/Level 2 GCSE (9– 1) in Biology consists of two externally-examined papers. These are available at foundation tier and higher tier.

What is a polymer in biology GCSE? Addition polymers are made from molecules containing C=C bonds. Polymers have different properties and uses but it is difficult to dispose of them. DNA, starch and proteins are biological polymers. What is a polymer Edexcel? A polymer is a substance of high relative formula mass , made up…