Search our library of homework questions

Top answers

All subjects

All levels

Describe the mechanism(s) as to which an enzyme binds to a substrate.

Two models have been proposed. The first being the 'Lock and Key Model' which simply describes the way in which the active site of an enzyme is complementary to the substrate shape, meaning that only the ...

Answered by Nicole B. • Biology tutor

2772 Views

Which of the basic life processes is described here? The ability of multicellular organisms to regulate their internal environment so that it stays optimum for cellular survival.

Homeostasis

Answered by Alice M. • Biology tutor

2643 Views

Explain how the electron pair repulsion theory can be used to deduce the shape of, and the bond angle in, PF3

Phosphorous has five electrons in its outermost shell of electrons. Fluorine provides three electrons to the phosphorous allowing the formation of a stable central phosphorous atom which now has 8 electro...

Answered by Prashan B. • Chemistry tutor

9500 Views

Expand (x-5)(2x-3)

(x-5)(2x-3)= 2x²-3x-10x+15

= 2x² -13x + 15

Answered by Sharone S. • Maths tutor

4602 Views

You are told that the y is proportional to x^2 and that when y=75, x=5. Find a formula for x in terms of y.

If we know that y is proportional to x²then we using the given values we can write 75= 5²--> 75=25, however this is obviously not true but all that remains is to multiply the 5<...

Answered by Jenieka P. • Maths tutor

2789 Views