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Explain the lock and key hypothesis of chemical reactions.

The lock and key hypothesis explains how each enzyme acts specifically on a certain substrate. The lock is the enzyme. The key is the substrate. The lock has a site where a specific substrate binds called th...
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Answered by Charlotte H. • Biology tutor
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Translate the following into Spanish: "Last week I played football with my friends at the park because it was really sunny. I love to play football!"

La semana pasada, jugué al fútbol con mis amigos en el parque porque hacía mucho sol. Me encanta jugar al fútbol!
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Answered by William H. • Spanish tutor
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Give three ways in which music technology is used by musicians

Examples:Sequencing software: using MIDI or audio files, composers can synthesise sound on a Digital Audio Workstation (DAW) to create musicDigital sound effects: synthesised sounds can be manipulated using ...
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Answered by William H. • Music tutor
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Make x the subject of the formula: 3(2x-y)=ax-4

Expand the brackets out first6x-3y=ax-4Now, get all the x's on one side6x-ax=3y-4and now factorise the side with the x's as we want to isolate xx(6-a)=3y-4and now divide both sides by (6-a)x=(3y-4)/(6-a)
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Answered by Charul R. • Maths tutor
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How should the verb "gustar" be used? What's special about it?

Gustar isn't a normal reflexive verb, although it might look a bit similar! Instead of saying "I like x", like we do in English, in Spanish we use the verb gustar to say that something pleases us. ...
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Answered by Kane T. • Spanish tutor
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