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Biochemistry, Biology

Biology Biteables – Lac Operon

An Operon is a collection of genes, which perform a similar function. The Lac Operon controls the uptake and metabolism of Lactose. It is found in prokaryotes, such as E. coli. The Lac Operon consists of a Lac I gene (Repressor), a Promoter, an Operator, and three genes - Lac Z, Lac Y and Lac… Continue reading Biology Biteables – Lac Operon

Biochemistry, Biology

Biology Biteables – Transcription

Transcribe: To copy something Transcription is a biological process by which information stored on a gene is copied to a short molecule called messenger RNA. A gene can be divided into two sections: - a Promoter region, which includes a sequence (TATA box), that can be recognised by the active site of the enzyme RNA… Continue reading Biology Biteables – Transcription

Biology

Tumour suppressor genes and cancer

Each cell in the body divides a finite number of times. During each cell division a complex series of events takes place inside the cell, which ensures that each daughter cell is an exact genetic replica of the parent. These events are orchestrated by master genes, which produce proteins that act as gatekeepers at the… Continue reading Tumour suppressor genes and cancer

Biology

Why do cells need ATP? – role of ATP in cell division

During the life cycle of a cell, each cell divides to form two genetically identical cells. This process is called mitosis. Just before the cell enters mitosis, the DNA duplicates. During the process of mitosis each half of the DNA is pulled to towards the opposite poles of the cell. When the cell divides into… Continue reading Why do cells need ATP? – role of ATP in cell division