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Explain the difference in the rates of reaction at 60 °C and 37 °C between 20 and 40 minutes.

"A technician investigated the effect of temperature on the rate of an enzyme-controlled reaction. At each temperature, he started the reaction using the same concentration of substrate. Explain the dif...
EC
Answered by Ellie C. • Biology tutor
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Briefly describe the structure and function of the respiratory system

Structure: The respiratory system starts at the mouth and nose with the pharynx, and continues as the trachea - this is covered with the epiglottis that prevents food and other material entering the lower ai...
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Answered by Joe D. • Biology tutor
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Describe what can be used to determine the time of death of a corpse

there are five different distinct methods whihc can be used to determine time of death: Body tempreture: The body cools after death as there are no heat producing metabolic reactions. The drop in tempreture ...
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Answered by Daniella P. • Biology tutor
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What are the two main differences between prokaryotic and eukaryotic cells?

The main difference between the two types of cell is that prokaryotic cells have no (membrane-bound) organelles. This means that the processes that usually happen in organelles take place in the cytoplasm. T...
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Answered by Alex B. • Biology tutor
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Synapses are an important part of the nervous system. What is a synapse? Describe how information passes through a synapse.

A synapse is a junction between neurones. Description of a synapse being a small gap between two neurones. Synapses use chemical messengers to pass an impulse of electrical depolarisation from one neurone to...
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Answered by Bethan G. • Biology tutor
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