Amino Acids Lab Report

The serial 2-fold dilution were done with a volumetric pipette, its pump, and 10 mL volumetric flasks. Eight different solutions were produced, half of which came from Red 40 and the other half, from Blue 1. These different concentrated solutions were placed in a 10 mL volumetric flask, each labelled with either R for Red 40

Also, if the grass length stayed consistent throughout the experiment, results would have been more

This was done to get more accurate results. The first time the experiment was conducted it was tested at three different time points, at zero minutes, fifteen minutes and

The final mass could be far off due to the water and chunks of expanded gummy bears found in the beaker, leading to an inaccurate result. As well, for the sugar solution, the result could have been different if a more accurate measurement of the sugar needed was made. For the specific result, the hypothesis stated, the sugar solution needed to have an equal amount of sugar content to the gummy bear which did not occur. Ensuring that the beaker contained 10 grams of sugar was off, due to prerequisite calculations that lead to too much liquid in the beaker that needed to be removed. To be correct, the hypotheses that were wrong could

This could have impact different sized cubes to varying extents. Human error also occurred when the 3cm3 cube had to be repeated as it was initially incorrectly measured. This could have contributed to the results being less reliable as the concentration of phenolphthalein in the agar cube could have been different from that of the other cubes (Unknown, 2008). The method was quite successful and produced relatively accurate results. Next time, a substance such as hydrochloric acid could be used instead of sulphuric

3. In this experiment, the percent yield was 90%. This number implies that there was little error in this experiment. However, this result could have been caused by certain external factors.

Arianna Diazwightman - Biology Lab Report PID - 5869132 Gabby Vazquez, Catalina Ortega, and Jerry Lab Section 41 Table 5 Lemme Break It Down Ft. Amylase The effects of temperature on the ability of an enzyme to break down starch. Abstract

However, any doubts regarding the results may be traced to a few elements of the experiment that lend themselves to possible error. The following factors may have contributed to potential errors in the experiment; the need to zero the machine between each of the readings in obtaining the absorption spectrum and the resulting peak wavelength, the precision with which a person can accurately adjust the needle on the spectrophotometer to zero is limited, not putting in the inaccurate amount of cobalt chloride or water into the substance, and getting oil from our fingers onto the

Even though that hypothesis was proven correct, there is still a possibility that there is some error in our results. One source of error could have been that on the first day of testing it was very cloudy outside and then on the second day it was very sunny. This could have caused the rate of photosynthesis to be much less on the first day than the second day because it received less sunlight on that day. Another source of error could have been the fact that the bottles were not thoroughly washed before a different plant sample was used in them. There could have been residual matter

The actual data is the result on our experiment vs theoretical, which is based on the calculations above. I have also learned to pay more attention to draining out all of the product completely before continuing to test the experiment, as any small drop of contaminant can veer our results into a different

Due to the unaccountability of the inconsistency in droplet size, many of the numbers may be varied because in one trial a huge droplet may count as one, but in another trial, I may have counted a small droplet as one, which causes results to possibly be

For example, in the response experiment, a yeast solution was prepared without sugar mistakenly and thus had to be prepared again. This suggests that other errors in preparation and measurement could have been encountered. For the future, careful measurements using clean uncontaminated flasks would eliminate possibilities of such error. A source of error for the metabolism experiment involves the yeast’s yellow hue. It is possible that the color of the yeast caused the solution to look more

Next, the amount of seedlings in the tray that expressed a green or white phenotype were both counted. The group observed that there were eleven total seedlings; eight of those seedlings were green and the three remaining were white. The next step in the experiment was to add up the class totals of green to albino seedlings, as shown in table 1. After determining a group phenotype ratio of 8:3 and a class ratio of 42:10, the group questioned what defect the white plants could have that might make the seedlings appear albino instead of green. The students concluded that a lack of chloroplast could explain why some of the seedlings were albino. The lab partners also decided that for a recessive, albino phenotype to be expressed, GG, Gg, and gg had to be the genotypes of the seedlings.

The 3 concentrations of enzymes were 0.5 ml, 1.0 ml, and 2.0 ml of turnip extract, while the substrate consisted of 0.1ml, 0.2 ml, and 0.4 ml of hydrogen peroxide. In a separate tube, the control was made up of turnip extract and guaiacol, known as the color reagent. This was recorded the absorbance every 20 seconds for 3 minutes.

Introduction The term chromatography actually means colour writing, and signifies a technique by which the substance to be examined is placed in a vertical glass tube containing an adsorbent, the different segments of the substance traveling through the adsorbent at distinctive rates of velocity, according to their degree of attraction to it, and producing bands of colour at different levels of the adsorption column. The substances least absorbed emerge earliest; those more strongly absorbed emerge later. (Wixom et al., 2011) In chromatography of all types, there is a mobile phase and a stationary phase.