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Why can enzymes only catalyse one specific reaction?

Because enzymes have a specific tertiary structure which defines the 3D shape of the active site. This means that only a substrate with a complimentary shape to the active site can bind to it and form an enz...
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Answered by Jasmine M. • Biology tutor
7600 Views

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
10794 Views

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
8519 Views

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 ...
DP
Answered by Daniella P. • Biology tutor
7564 Views

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
20987 Views