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The lock and key model only allows one type of specific substrate to form a substrate-activesite complex with each specific type of enzyme. This is due to their complementary shapes, as only one shape and...

In this question you must first look at the wording. This is a describe question and therefore a description is required but not an explanation. It is worth 5 marks so aim to describe 5 or more reasons ho...

Meiosis produces four cells through two cell divisions, whereas mitosis produces two cells through one cell division 2. Meiosis produces haploid cells, whereas mitosis produces diploid cells 3. Meiosis ha...

Follicle stimulating hormone (FSH) secreted from the pituitary gland stimulates egg maturation and oestrogen secretion from the ovaries. Oestrogen in turn inhibits FSH release and stimulates luteinising h...

Vaccination involves administering a dead or inactive form of a pathogen to a subject, which stimulates white blood cells into producing antibodies specific for that pathogen. If the subject encounters th...