Maths In Biology

Question 1

Circumference of a circle

Answer 1

2pi x r

Question 2

Area of a circle

Answer 2

Pi x r squared

Question 3

Area of a cuboid

Answer 3

2 ( wxh + lxh + wxl)

Question 4

Volume of a cuboid

Answer 4

W x h x l

Question 5

What’s significant when doing Percentage increase?

Answer 5

Smaller number always on the bottom

Question 6

Percentage change

Answer 6

New value- original value/ original value (or value comparing to) x 100

Question 7

Magnification

Answer 7

Image size/ actual size

Question 8

Rf value

Answer 8

Distance moved by solute/distance moved by solvent

Question 9

Cardiac output

Answer 9

Stroke volume x hr

Question 10

Respiratory quotient

Answer 10

CO2 produced/ O2 consumed

Question 11

Microorganism population growth

Answer 11

N= N0 x 2^n

N= no. Of bacteria
N0= no. Of bacteria in starting colony
2^n= 2x no. Of generations

Question 12

What does log10 10000=

Answer 12

=4
4 is the power

Question 13

Rate=

Answer 13

Change in quantity/time

Question 14

What does mlmin^-1 mean?

Answer 14

Ml per min

Question 15

proportion of polymorphic gene loci=

Answer 15

number of polymorphic gene loci/ total number of loci

Question 16

efficiency=

Answer 16

(biomass transferred/biomass intake) x 100

Question 17

Ratio=

Answer 17

Surface area/ volume

Question 18

percentage error=

Answer 18

(uncertainty/reading) x 100

Question 19

Uncertainty=

Answer 19

margin of error/2

Question 20

frequency density=

Answer 20

frequency/class width

Question 21

1000m in km=

Answer 21

1km

Question 22

1000µm in mm=

Answer 22

1mm

Question 23

1m in dm=

Answer 23

10dm

Question 24

1m in cm=

Answer 24

100cm

Question 25

1m in mm=

Answer 25

1000mm

Question 26

1nm in mm=

Answer 26

1,000,000

Question 27

1nm in µm=

Answer 27

0.0001

Question 28

mm >µm

Answer 28

x 1000

Question 29

percentage change=

Answer 29

(difference/original) x 100

Question 31

validity

Answer 31

the extent to which additional variables that could effect the dependent variable have been controlled

Question 32

systematic error

Answer 32

an error that affects every experiment

Question 33

random error

Answer 33

an error that doesn’t effect every experiment and is due to an unexpected or unique event

Question 34

resolution

Answer 34

the smallest change that can be measured

Question 35

uncertainty

Answer 35

interval in which the true value lies

Question 36

repeatable

Answer 36

if the original experimenter repeats the investigation and obtains the same results

Question 37

reproduceable

Answer 37

if a different experimenter repeats the investigation using the same methods and obtains the same results

Question 38

total magnification=

Answer 38

eyepiece lens x objective lens

Question 39

formula for bacterial growth

Answer 39

N=N0 x 2^n

N=number of bacteria currently in the population
N0= number of bacteria in the population at the beginning
^n= number of divisions