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How does the Calvin Cycle in photosynthesis work?

If you recall the basic chemical equation for photosynthesis: CO2 + H2O --> O2 + Carbohydrate (with 6-Carbons) ​This is precisely what occurs during the calvin cycle. Carbon dioxide is fixated and at the ...
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Answered by Kartika A. • Biology tutor
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Explain why biological enzymes would stop working at temperatures higher than 45 degrees Celcius.

1. Biological enzymes are proteins, meaning they have specific shapes depending on bond interactions. 2. The active site of the protein is specific to a certain substrate (the thing being broken down). 3. At...
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Answered by Masood H. • Biology tutor
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Why is ATP required for skeletal muscle contraction?

When muscles contract, the length of the sarcomere (distance between the Z-lines*) shortens. ATP is required for the process of cross-bridge cycling which enables the sarcomere to shorten. The steps of cross...
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Answered by Surina F. • Biology tutor
39837 Views

Describe the passive movement through diffusion and explain Fick's Law

Diffusion is the net passive movement of particles (atoms, ions or molecules) from a region in which they are in higher concentration to regions of lower concentration. It continues until the concentration o...
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Answered by Zuzana B. • Biology tutor
49029 Views

How do muscle fibres contract?

Contraction occurs when an impulse from a motor neurone reaches the synapse at the junction with the muscle, the neuromuscular junction (NMJ). At the presynaptic membrane of the NMJ, depolarisation results i...
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Answered by Emily B. • Biology tutor
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