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Why do cells have receptors that allow viruses to invade?

Rather than cells having receptors specific to viruses, cells have receptors specific to molecules it needs to acquire from outside the cell, such as glucose (needed for respiration). It is the viruses wh...

Answered by Emily R. • Biology tutor

4173 Views

differentiate the following to find the equation for the gradient of the curve in terms of x and y: 3x^3 + 4x^2 + 5xy + 7y = 0

9x^2 + 8x + 5y +5xdy/dx + 7dy/dx = 0

9x^2 + 8x + 5y = dy/dx(-5x - 7)

dy/dx = - (9x^2 + 8x +5y)/(5x + 7)

Answered by Hew P. • Maths tutor

3546 Views

Differentiate 8x^4 + 2x^2 + 10

Differentiating is a process to turn one expression into another, which has many uses in maths. Our expression is made up of three parts: 8x⁴, 2x² and 10.

Answered by Jamie C. • Maths tutor

3754 Views

How do I analyse art?
When analysing art, you should first of all find out when the piece was created, who created it and what the piece was created using (for example, is it a painting? a sculpture or a photo?). After you hav...
JS
Answered by James S. • Art tutor
1899 Views

There's a school in India where only 60% of students have internet access. What is the probability of choosing eight students randomly, five of whom have internet access? (Info: Each student's internet access (or lack of it) is independent from all others
Imagine a bag of balls. Each ball represents a student, and those with A on them are students with internet access, while balls without an A are those without internet access. We know from the question, w...
JG
Answered by Josh G. • Maths tutor
3012 Views

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Top answers

Why do cells have receptors that allow viruses to invade?

differentiate the following to find the equation for the gradient of the curve in terms of x and y: 3x^3 + 4x^2 + 5xy + 7y = 0

Differentiate 8x^4 + 2x^2 + 10

How do I analyse art?

There's a school in India where only 60% of students have internet access. What is the probability of choosing eight students randomly, five of whom have internet access? (Info: Each student's internet access (or lack of it) is independent from all others

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