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Compare the structure of prokaryotic and eukaryotic organisms.

Prokaryotic and eukaryotic organisms have some similar structures: cells membranes (selectively permeable membranes surrounding cells and controlling the entry and exit of materials), cytoplasm (the living s...
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Answered by Paige T. Biology tutor
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Why are enzymes affected by temperature?

At low temperature, there is low kinetic energy (=molecules move more slowly). So, an enzyme and a substrate are less likely to randomly collide with eachother (similarly, people are more likely to bump into...
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Answered by Zoe N. Biology tutor
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What is a reflex arch?

Reflex arch is a neural pathway that controls a fast, involuntary reflex. The pathway is as follows: 1)Receptors detect a stimuli such as fire or a neddle pricking your finger. 2) Nerve impulses from the rec...
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Answered by Momna R. Biology tutor
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What is ventilation of the lungs and how does it occur?

Ventilation means moving air into and out of the lungs. This depends on a number of factors which we can break down and talk about individually. The structure of the thorax: An airtight space in the body tha...
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Answered by Rebecca W. Biology tutor
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Do you have any exam tips for Biology Paper 2?

So one thing I observed in my Biology class was that students would memorise every single piece of inforrmation about each biological process that was written on their 'comprehensive flashcards'. One thing t...
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Answered by Louis B. Biology tutor
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