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In which cell structures does respiration mainly occur?

Resperation in cells occurs in the Mitochondria. Mitochondria are rod shaped organelles that can be thought of as the power generators of the cell. There role is to convert Oxygen and Nutrients into Adeno...

Answered by Rory M. • Biology tutor

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Describe the stages in DNA transcription and translation

DNA is unziped by DNA helicase. RNA polymerase catalyses the formation of a complementary strand of pre-mRNA, using the non-coding strand of DNA as a template. The pre-mRNA contains non-coding regions (in...

Answered by Iona N. • Biology tutor

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How does co-transport work?

Co-transport is a type of transport across cell membrane and it requires transport proteins embedded in the membrane of the cell. The best way to explain how this process works is to exemplify it. Good ex...

Answered by Kristina K. • Biology tutor

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Which mechanisms control the homeostasis of blood sugar levels in the human body? How do these regulate the concentration of sugar in the blood?

The homeostasis of blood sugar levels in controlled via a careful balance of hormonal secretions leading to an increase of blood sugar concentation when needed. when the blood sugar concentration is too h...

Answered by Harry G. • Biology tutor

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Explain the neuromuscular junction

Action potential causes depolarisation in the presynaptic bulb, this causes voltage-gated calcium channels to open. This causes vesicles containing the neurotransmitter acetycholine to move and fuse with ...

Answered by Zahra O. • Biology tutor

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