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Prior to cell division, cells replicate. Explain the process of DNA replication in prokaryotes.

Prokaryotic DNA is different to eukaryotic DNA in that prokaryotic DNA is circular, and thus has an origin of replication. When replication starts, it starts at this origin and occurs

Answered by Molina D. • Biology tutor

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How are animals and plants adapted to their niche?

Animals and plants display structural and behavioural adaptations to their surroundings. Each animal and plant faces certain challenges to their survival such as predators, harsh weather or low food resou...

Answered by Rosanna S. • Biology tutor

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How come the antibodies in our blood and lymphatic system do not attack our own, but only specific antigens?

Antibodies and antigens are made out of proteins. Proteins have a specific primary structure. The primary structure is the sequence of the amino acids that make up the protein. This sequence is specific t...

Answered by Cassandra U. • Biology tutor

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How do you get from an a base like adenine to an enzyme/protein?

There are four bases- ATGC adenine, thymine guanine and cytosine.

Each base is attached to a deoxyribose sugar and a phosphate sugar. This makes up a nucleotide. Three nucleotides are called a codo...

Answered by Joshny J. • Biology tutor

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Describe the hormonal control over the menstrual cycle in females.

Menstruation in women is under the influence of the hypothalamic-pituitary-ovarian axis, or HPO axis. The pituitary gland secretes follicle-stimulating hormone (FSH) and luteinising hormone (LH), which ac...

Answered by Tom C. • Biology tutor

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