Biology Calculations & Equations

Question 1

How can the total magnification of an image be calculated from lens powers?

Answer 1

Total magnification = eyepiece lens magnification x objective lens magnification

Question 2

How do you calculate magnification of an image?

Answer 2

I A M

Image size, Actual size, Magnification

Question 3

How do you convert from m to mm?

Answer 3

× 1000 (x 10^3)

Question 4

How do you convert from m to um?

Answer 4

× 1000 000 (x 10^6)

Question 5

How do you convert from m to nm?

Answer 5

× 1 000 000 000 (x 10^9)

Question 6

How to you convert from nm to m?

Answer 6

÷ 1 000 000 000 (× 10^-9)

Question 7

How do you convert from m to pm?

Answer 7

× 1 000 000 000 000 (x 10^12)

Question 8

How can the rate of an enzyme-controlled reaction be calculated when given a value for time?

Answer 8

Rate = 1 / time

Question 9

How is BMI calculated?

Answer 9

BMI = mass in kg / height in m^2

Question 10

How is an individual’s waist-to-hip ratio calculated?

Answer 10

waist-to-hip ratio = Waist circumeference (cm) / hip circumeference (cm)

Question 11

Write the word equation for photosynthesis?

Answer 11

Carbon dioxide + water -> Glucose + oxygen

Question 12

What is the word equation for aerobic respiration?

Answer 12

Glucose + Oxygen -> carbon dioxide + water

Question 13

What is the word equation for anaerobic respiration in muscle cells?

Answer 13

Glucose-> lactic acid (ATP)

Question 14

What is fick’s law?

Answer 14

Rate of diffusion is directly proportional to (surface area x concentration) /thickness of membrane

Question 15

How is cardiac output calculated ?

Answer 15

Cardiac output = heart rate x stroke volume

Question 16

What is the equation for calculating the efficiency of biomass transfer between trophic levels?

Answer 16

Efficiency = (Biomass available after transfer / Biomass available before transfer) x100