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What are enzymes and how do they work?

Enzymes are small proteins found in living organisms. They are described as biological catalysts, meaning they speed up reactions and remain unchanged at the end, ready to do the same aga...

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Answered by Isabel M. Biology tutor
2584 Views

How do you show some quadratic polynomials are always greater than 0?

Usually, there are two ways to solve this kind of problems. You could re-arrange the polynomial, make it become a square plus a constant, then the polynomial is greater or equal to the constant since a sq...

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Answered by Luke W. Maths tutor
5367 Views

What is a mole?

A mole is a measure of quantity, such that when you have a mole of something, you have 6.02 x 1023 atoms/molecules of it. The number of atoms/molecules in a mole is called "Avogadro's Numb...

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Answered by Amy F. Chemistry tutor
2055 Views

Why do organs need to be 'matched'?

The antigens present on the cell surface membranes of organs are different from person to person due to genetic variation (leading to protein tertiary structure variation - remember antigens are proteins ...

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Answered by Frances E. Biology tutor
2226 Views

¿Hasta qué punto considera usted que los medios de comunicación afectan a los gobiernos? Comente.

Creo que los medios de comunicación afectan los gobiernos de una manera inmensurable. En las elecciones de 2016 en los estados unidos, los dos más grandes candidatos tienes problemas con medios de comunic...

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Answered by Megan M. Spanish tutor
1482 Views

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