maths/graphs in biology Flashcards
how do you calculate percentage error?
error/actual reading x 100
how do you calculate rate of reaction (in enzyme experiments)?
1/time
how do you calculate rate of reaction from a reaction progress graph?
draw a tangent to the curve and draw a line of best fit
what should you do if the data given only shows the time completed to complete the reaction (specifically in enzyme experiments)?
calculate rate of reaction using 1/time
how do you calculate rate of reaction from a reaction progress graph (graph which shows mass of products made/ mass of reactants used up against time?)
draw a tangent to the curve and calculate gradient
how would you answer a question which asks to evaluate the effectiveness of a certain treatment? (5)
1) explicitly state if it is ineffective/effective
2) explicitly give a reason why and be specific with data
e.g effective bc levels of x reduce after 4 months
3) link data to disease
e.g ineffective bc symptoms will still occur for 2 months
4) state if data remains stable/ increases/ decreases and at what point
5) state if there are reasons for unreliability e.g
only shows results for a short period of time
unknown side effects
no control group/ only one person
how do you calculate log(10) of antibodies when a question gives you data with a wide range of values?
log(whatever the number is)
how do you work backwards when the question gives you
log10+6.22
press shift and put in the number
e.g
log10=6.22
10^6.22
how to answer a question that gives you a scale and asks you to calculate the minimum distance of something? (3)
1) measure scale with ruler in
2) measure width of object asked to measure in image
3) divide step 2 by step 1 and multiply by number on the scale
what is the surface area of a sphere?
4 pi r2
what is the volume of a sphere?
4/3 pi r3
