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Explain the sliding filament theory The sliding filament theory describes the process by which muscles contract. Muscle fibres are made up of myofibrils. Myofibrils comprise of sarcomeres, containing actin a...

Phospholipids are arranged in a bilayer (a double layer). They have hydrophobic tailss (made of fatty acids) and hydrophilic heads (made of a phosphate group). The hydrophilic heads are to the outside and th...

DNA DNA stands for deoxyribose nucleic acid. It is a stable, double stranded helix structured molecule which encodes all of our genetic information. It consists of a sugar-phosphate backbone, held together b...

A reflex is an innate (in built) action designed to keep an organism safe from harm. A good example of a reflex is to imagine you touch a hot pan, you immendiately withdraw your hand from the painful stimulu...

What is DNA? DNA is the chemical used to store genetic information (inherited traits and characteristics) in the body. The shape of DNA is a double helix (two complementary chains, interwoven). Every chain h...