Science Essays

Introduction In vascular plants movement is water up the xylem from the roots to the leaves is an essential process, responsible for supplying the plants tissues with water and maintaining cell turgor (which has a role in preventing the plant wilting). Aside from the weak “push” effect of the difference …

Aim: The purpose of this investigation is to experimentally determine the effect a change in substrate concentration, Hydrogen Peroxide, (H2O2) will have on the rate of action (measured in time taken to surface due to buoyancy of O2 gas)of an enzyme (Catalase). Background: The human body functions due to the …

Introduction Biodiversity is defined as the abundance and variety of organisms, genes and communities in nature. Pitfall traps were used to compare populations and communities of invertebrates in two different parts of the Nyabweya region, Uganda, with the hope of finding out whether human activities would decrease the biodiversity of …

How does the solute concentration of Hydrogen Peroxide affect the enzyme rate of homogenized liver catalyze? Theory The Effect of Catalase1 Liver and other living tissues contain the enzyme catalase. As with all enzymes, catalase of homogenized liver is a protein, meaning that it is synthesized within the cell from …

The Scenario: Joe Soap was apparently found dead in his living room by two acquaintances, Bernard White and Arnold Brown. He had been stabbed twice in the chest with a kitchen knife, and there were signs of violent struggle at the scene. SOCO recovered various items and material from the …

Aim: Investigate the effect of a factor that influences enzyme activity Background: Scientists attended a Pre Lab discussion about enzymes reviewing the many factors that should commonly affect enzymes such as temperature, poison, pH, number of enzymes and solubility. The role of enzymes was also reviewed in order for students …

Hypothesis: an explanation of an observation, written as a statement and testable. Can be based on previous knowledge Variables a characteristic or property capable of taking on a range of values and with the potential taffect things Independent variables: variable set before starting the investigation Dependent variables: variable that is …

How I came up with the idea of this investigation: There was a day when there was a mosquito flying near the plants in my house and I tried to catch it, so I found the nearest large plastic lid and placed it on top of the bamboo plant with …

1. Design 1.1 Defining the problem 1.1.1 Focus Question- What will happen to the rate of reaction of the amylase in the starch when the temperature is changed? 1.1.2 Hypothesis- The rate of reaction of amylase in starch will change as the temperature is changed. 1.1.3 Theory- A enzyme is …

Experimental method: agar jelly cubes are used as samples of cells. A big peace of 2% agar jelly (containing indicator phenolphthalein) is taken and cut in 5 (x2) different size cubes (with a wall length of 1, 2, 3, 4, and one rectangle 1x2x4 cm). Then, cubes surface area and …