Purpose and Background Cells divide in two ways, mitosis and meiosis. Mitosis is used to produce cells that are genetically identical to the parent cell for growth, asexual reproduction, or repair after injury. Cells that are produced by mitosis are diploid, meaning that they have two complete sets of chromosomes, one from each parent. Meiosis is used to produce haploid cells that have only one set of chromosomes, a mix of chromosomes from both parents. Meiosis produces cells that are genetically unique from their parent cells.…
Interactive Question 7.2 Cite some experimental evidence that indicates that membrane proteins drift. A good form of experimental evidence is Fluorescence Recovery After Photobleaching, aka FRAP. In the FRAP process, membrane proteins are labelled with a green fluorescent protein, and part of the plasma membrane is “bleached” with a laser, causing them to lose their fluorescence. The part that was bleached will eventually become fluorescent again, as molecules drift in by diffusion.…
Biology 15 Lab # 4 Professor Passerini September 23, 2015 Scot Albert Lab #4 Questions 1a,b,c, 2, 3a,b,c, 4, 5a,b,c, 7, 11c, d, e, 12a,b ---------------------------------------------------------- 1- a-They are found primarily in the thylakoid membranes. b-No. Cyanobacteria do not have distinct nuclei.…
Several tests were accomplished technically and carefully to identify the unknown # 230 to be M.luteus bacteria. Most of the observed results do match the expected ones, except two tests. The observed results for glucose fermentation and oxidase test did not match the expected results. The expected result for fermentation of glucose test was negative while the observed result was positive.…
This experiment was designed to test what the limiting nutrient was in Loughberry Lake, as well as examine the trophic state of the lake. In order to find out what the limiting nutrient was, we performed a few different tests. We began with a secchi disk test to see the transparency of the water. Then, we took water samples that we later used to test the turbidity levels of the water after adding varying amounts of phosphorous and nitrogen.…
Introduction The Chesapeake Bay that is 200 miles long is considered the largest estuary in the United States. It is home to more than 17 million people (NOAA). Baltimore, one of the most important North Atlantic port is located on the Chesapeake Bay. Oysters are one of the biggest resources of the Chesapeake bay.…
While the goal of the goldfish lab was to teach the subject how to jump, this objective was unachieved, resulting in the inability to have our fish learn the trick. This outcome was most likely do to the minimal capacity in the brain of the goldfish, making it hard for the animal to remember how to perform the skill being taught. The fish only has a memory that lasts 3 seconds; however, the task took longer than 3 seconds to complete, resulting in the incapability of performing the jump. Also, the goldfish would not eat the food that was provided, influencing the failure of completing the trick because the fish would not interact with the incentive that was presented. In order to persuade the goldfish to complete the task, the food was going to be constantly raised higher until it located out of the water, in which the fish would have to jump and reach it.…
There have been many great articles that have been published over the years . There are also many great authors such and Pam Munoz Ryan and Jennifer L. Holm. These two magnificent writers have produced many great articles. These authors have produced two very good articles such as “Freddie in the Shade” and Follow the Water”. Jennifer L. Holm is an American children's writer , and a person who won three Newbery Medals for her writing.…
was clear from the data obtained by polarized light microscope (Figs. 4G and H) that the Haversian system is found as an individual canal system, the boundaries, which are marked by an occasional very faint line representing what has been called the cement line by Cook et al. [47]. Osteocytes, found in cavities (lacunae) within the matrix, were noticed. Dark precipitate in the form of a thick black line may indicate the presence of calcium phosphate in calcified bone.…
From the table of result, the highest percentage of killed bacteria is 99.7% with only 4 live colonies in the tube 1. It proven that vinegar is a great disinfectant as there is a huge number of killed bacteria. This is because there is 100% of disinfectant. Inversely, tube 4 has the lowest percentage of killed bacteria, where only 37.5% of bacteria are killed. Tube 4 has a huge number of live colonies with 580 colonies.…
Dissolve completely the nutrient broth powder in beaker containing 200 ml of distilled or the deionise water. Then the mixture is transfers to the vials. Those vials are autoclave and sterilise at 1 atmosphere pressure in the temperature of 121 ℃ within 15 minutes. The nutrient Broth vials are inoculate with bacteria. The 200-600 µl of bacteria are the amount of bacteria that is will inoculate into broth.…
Osmosis is the net movement of water towards higher concentration. In osmosis experiment, water likes to diffuse from an area of low-solute concentration to an area of high-solute concentration. The purpose of the osmosis experiment was to observe the diffusion of solutes and the osmosis of water through a semipermeable membrane, which was dialysis tubing. This experiment was done to examine, if the solution is hypertonic, hypotonic or isotonic.…
Preparation for Cell Lysis Obtain the mammalian expression vector for homo sapien ESR2 from Addgene. Assemble the vector to code for the proteins snail, slug and twist. Transfect HEK293 cells with the modified plasmids in petri dishes. Allow the cells to grow for 1-2 days so they will express the proteins. Transfer the culture medium to a centrifuge tube to separate it from the cells.…
During the entire lab, the main purpose was to, Identify the given unknown salt through a variety of experiments which yielded valuable quantitative and qualitative data. Before any experiments were carried out, multiple properties were compiled in order to have a source to compare the found results with. Beginning with the first experiment to determine if the unknown salt was hygroscopic, efflorescent, deliquescent or none of the above properties. This test was done through weighing an amount of the salt and reweighing after 15 minutes which would show if the salt had one of the above properties (either by gaining mass from the air, losing mass to the air, turning to solution) or none of the properties. Furthermore, tests were done to identify…
Discussion The aim of this experimental report was to analyse and examine several water quality parameters including dissolved oxygen, water temperature and turbidity, in order to determine the overall state of health within Freshwater creek. Once the results from each parameter were collected, from both locations, it was that found they each had multiple interrelationships between each other as well as several anomalies which could have potentially skewed the final results. It was initially decided at the beginning of the dissolved oxygen experimentation that a reading would be collected from two locations with different features, in order to present a representation of the specific amounts of dissolved oxygen in different areas. It was evident…