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What is the effect of varying concentrations of caffeine (0%, 2%, 4%, 6%, 8%, 10%) on amylase inhibition by measuring rate of hydrolysis of starch via a colorimeter over a 7-minute period?
Biology
IA
5
HL
How do different temperatures (15°C, 20°C, 25°C, 30°C, 35°C) and light intensities (30%, 40%, 50%, 60%, 70%) affect oxygen production during photosynthesis in aquatic plants?e
Biology
IA
4
SL
Pro
How do varying concentrations of lead nitrate (0 mol/dm3, 0.1 mol/dm3, 0.2 mol/dm3, 0.3 mol/dm3, 0.4 mol/dm3 and 0.5 mol/dm3) affect the rate of enzyme activity of liver catalase in the decomposition of hydrogen peroxide, by measuring the amount of oxygen produced in 2 minutes using a gas syringe?
Biology
IA
6
HL
Pro
How does the pH of lactose (2, 4, 6 , 8 ,10) affect the concentration of glucose (mmol/liter) after 5 minutes?
Biology
IA
4
HL
Pro
Investigating the effect of L-ascorbic acid concentration on the rate of catalase activity in potatoes
Biology
IA
3
HL
How does iron(ii)sulfate concentration (0.0M, 0.1M, 0.2M, 0.4M, 0.8M) affect the enzymatic activity of catalase (from Bos taurus) measured from the increase in pressure (kPa) inside an Erlenmeyer flask when hydrogen peroxide decomposes over a 60 second period?
Biology
IA
6
HL
Pro
How does Salinity Concentration (in percentage) Affect Average Growth Rate (grams/day) of Mung Bean Species?
Biology
IA
4
HL
To what extent do fruit juices with differing pH levels (1.8, 3.2, 4.2, 5.2, 7) prevent the growth of microbial growth on Plain/White bread?
Biology
IA
4
HL
To what extent does the variety of apple (Malus domestica: Granny Smith, Jazz, Pink Lady, Golden Delicious, Honey Crisp)1 affect the rate of osmosis measured using the percentage change in mass over 5 hours in a 2M NaCl solution?
Biology
IA
5
HL
Pro
How does varying salinity a1ect the hatching rate, growth, and swimming speed of Artemia over a three-day period?
Biology
IA
4
SL