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Explain the sliding filament theory of muscle contraction

Muscle contraction begins after an action potential reaches the required muscle and causes the calcium ion protein channels on the sarcoplasmic reticulum to open. This allows the calcium ions to diffuse d...

Answered by Isabel L. • Biology tutor

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b)Plants can use the glucose they have made to supply them with energy. Give four other ways in which plants use the glucose they have made.

To make starch, oil, amino acids and cellulose.

Answered by Emma S. • Biology tutor

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a) Plants need energy to make glucose. How do plants get this energy?

Light is trapped, by the chloroplasts.

Answered by Emma S. • Biology tutor

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Human breast milk is produced and secreted by gland cells. These gland cells have adaptations that include many mitochondria and many Golgi vesicles. Explain the role of these cell adaptations in the production and secretion of breast milk.

(Many mitochondria) release energy / ATP for movement of vesicles / synthesis of protein / active transport; 2. (Many Golgi) vesicles transport protein / glycoprotein / milk to cell membrane / out o...

Answered by • Biology tutor

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Describe how an enzyme increases the rate of a biochemical reaction?

An enzyme has an active site at which it binds to the substrates involved in the biochemical reaction. This results in the formation of an enzyme-substrate complex. The formation of such an intermediate c...

Answered by Rebecca S. • Biology tutor

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