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Explain what the rate-determining step in a reaction is with reference to activation energy.

The rate determining step is the slowest step in a multi-step reaction, and it is the step in the reaction with the highest activation energy. It is the step in the reaction which decides the overall rate...

Answered by Sammy A. • Chemistry tutor

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Outline how light intensity affects the rate of photosynthesis, with reference to the Calvin cycle and effects on the concentrations of GP, GALP and RuBP.

Light is needed to provide energy for the light dependent reactions of photosynthesis. A greater light intensity will provide more energy for these reactions to occur. At a low light intensity, the produc...

Answered by Sammy A. • Biology tutor

7622 Views

Read the item and then answer this: Outline what is meant by the term bystander behaviour. Referring to the conversation above, identify one factor that can influence bystander behaviour and suggest how it would have influenced bystander behaviour...

...in this situation.Item:Archie: “On the way into work today, I saw a lady collapse. She fell over outside the coffee shop on the high street.” Jordan: “That’s terrible. Did you stop to help her?”(4 mark...

Answered by Izzy R. • Psychology tutor

2217 Views

Compare and contrast the rise to power of Stalin and Mao from an economic aspect.

Both dictators could exploit the weakness of their opposition caused by economic factors. Mao used the unwillingness of the GMD ( Chinese Nationalist Party ) to create economic reforms to advocate his ide...

Answered by Lili L. • History tutor

3001 Views

What is the difference between the primary and secondary immune responses? (May be asked in the form of how to interpret a commonly used graph on the subject)

In a primary immune response the active immune system must first recognise the pathogen via B-lymphocyte cells with antibodies on their surface that are complementary to the antigens of the invading path...

Answered by • Biology tutor

3774 Views