The glucose test strip had changed colors which indicated there was a presence of glucose in the beaker. Describe why the medium the dyes diffuse through can affect the rate of diffusion.
Therefore starch will have the lowest rate of respiration and will produce least amount of bubbles. Plants can absorb and use light energy because they have a green pigment, chlorophyll, contained in the chloroplasts in some of their cells.
Freshwater fish are in a hypertonic environment, so they maintain their balance by secreting water through urine. Also do not keep wter under microscope too long. Then the consequences will be more accurate. We will be doing each light intensity test three times to get an average for our graphs.
Problem Does pH affect the rate of Osmosis? This will be done by measuring the bubbles of oxygen and having a bulb for the light intensity variable.
This is what happened to the daphnia under the microscope the drug caused their heart rate to increase and the different concentrations caused the heart rate to increase at different levels.
Knowing that the AuNP and NH 2 OH 19 are necessary for the reaction to occur, we decided to investigate the effect of varying the concentration of both, gold nanoparticles and NH 2 OH, on the reaction efficiency.
In the same way, at different laser powers the fluorescence emission intensity is very similar, from which one can conclude that 50 mJ per drop is adequate for an essentially quantitative reaction following a single laser shot. Variables The input variable which will be used in this investigation will be the light intensity this will be a Watt bulb being moved closer and further away from the plant.
In a hypotonic or hypertonic environment, a cell may be liable to gain or lose water. Both solutions with 0. Chlorophyll allows the energy in sunlight to drive chemical reactions.
To further confirm that the gold nanoparticles play a key role in the reduction of resazurin to resorufinthis reaction was performed in the absence of AuNP employing the laser-drop technique.
Radiation is the heat loss given off by hot objects in the foam off infrared radiant heat. It increases due to increased levels of ATP which affect contractions and relaxations of the heart. Once the caffeine has reached the heart it attaches itself to specific receptors causing the heart rate to increase.
However, it is well known that metal nanoparticles quench the fluorescence of molecules in their vicinity; 9,20 quenching of resorufin fluorescence emission was performed for different concentrations of AuNP Fig.
The experiment was done at two different power settings of the LED irradiator 0.ESSAY QUESTIONS KEYED TO THE AP BIOLOGY LABS. LABORATORY #2 ENZYME CATALYSIS. After an enzyme is mixed with its substrate, the amount of product.
The concept of speed or rate as the change in a measured quantity per unit of time is readily understood by most children. For example, if a car travels at 50 km h-1, it is simply stating that in 1 hour, a distance of 50 km is travelled.
In science lessons, most students encounter the idea of rate when exploring the rate of dissolving in simple practical activities.
Experiment 2- Finding the best amount of resazurin to use: Changed: volume of resazurin (1ml, 2ml & 3ml) Kept constant: Temperature of water bath (49 degrees), volume of yeast (10ml) Results: 1ml: secs 2ml: secs 3ml: secs I found that the best amount of resazurin to use was 1ml because it doesn't take as long and there's less chance of over diluting the yeast with it.
The Daphnia in the temperature experiments had a considerably higher heart rate than that of the Daphnia used in the solution experiments. This could show that the solution Daphnia was weak at the onset of the experiment.
Rate of resazurin ecperiment. The resazurin experiment – Investigating the effect of concentration on rate an enzyme – controlled reaction in yeast Preliminary experiment and prediction The experiment we did was to see the colour change in resazurin when it was placed in a warmed water bath in different concentrations of yeast suspensions.
Rates of Reaction. The rate of a reaction can be measured by the rate at which a reactant is used up, or the rate at which a product is formed. The temperature, concentration, pressure of reacting gases, surface area of reacting solids, and the use of catalysts, are all factors which affect the rate of a reaction.Download