Essays on Cells

Investigating the effect of pH on the activity of the enzyme catalase. Introduction Hydrogen peroxide (H2O2) is a very pale blue liquid that appears colorless in a dilute solution, slightly more viscous than water. It is a weak acid. It has strong oxidizing properties and …

Alexandra Mitchell Dr. Lamont King GAFST 200 November 30, 2010 Sugar Cane Alley Jose understands at a young age that in order to escape the indentured life of working in a sugar cane plantation like his ancestors before him, he must do something different. In …

Nucleus: The nucleus is the most obvious organelle in any eukaryotic cell. It is enclosed in a double membrane and communicates with the surrounding cytosol via numerous nuclear pores. Within the nucleus is the DNA responsible for providing the cell with its unique characteristics. The …

INTERDEPENDENCE IN NATURE Many of the relationships between organisms in nature are those of dependence. Whether it be a deer breathing oxygen produced by a nearby tree or a tick sucking the blood of its unsuspecting host, every organism depends on another organism in some …

Lecture Quiz- 10/9/2010 Answer Key 1. The scientific study of life is called: A. biology B. ecology C. anatomy D. biochemistry E. limnology 2. Human beings are _______________ because they are composed of many cell types. A. unicellular B. acellular C. asymmetrical l D. autotrophic …

I believe that our observations are repressentative of cell division taking place in the oinon root tip. Firstly, this is because our numbers of the number of cells in each phase of mitosis are similar to the rest of the groups, so we can assume …

Using a human cell of your choice, describe how organelles work together to make and secrete a protein (LO1. AC 1. 1) An epithelial cell in the thyroid gland, called a thyrocyte forms spherical follicles that produce a protein called thyroglobulin. This is a globular …

In the human body, cells are constantly going through the cell cycle. An Important step of the cell cycle Is called mitosis, In which the cell (referred to as the parent cell) undergoes a series of steps that lead to the formation of two daughter …

Load cells are detectors which are used to mensurate the degree or force per unit area by change overing the force ( torsion or mass ) into electrical signals and so these signals are displayed by the show unit to demo the degree or force …

Introduction Potatoes are just your average food; they have been around for as long as the human race can remember. In this lab, we will make them be a prime example of osmosis, which is a transport mechanism. In this lab the problem being tested …

The consumption of the products grew enormously and therefore it is not surprising that we characterise today society as a consumption society. Nevertheless, it has become evident at the end of the 20th century that the philosophy of human rogress that has manifested itself in …

The structural compartmentation of mammalian cells and the differing functions of these compartments. All mammals are eukaryotes and therefore have eukaryotic cells. These cells contain several organelles suited to a specific function they carry out within the cell. These eukaryotic cells contain a Nucleus, Mitochondria, …

Chapter 2 IB Biology 2. 1 Cell Theory 2. 1. 1 Outline the cell theory (2). •All organisms are composed of one or more cells •Cells are the smallest units of life •All cells come from preexisting cells •TOK: cell theory replaces the former ideas …

Osmosis in Red Onion Cells By: Youssef Gharib Brief Description of Osmosis in Red Onion cells: Osmosis is the diffusion of water from an area of low concentration to an area of high concentration across a semi-permeable membrane. The purpose of this lab is to …

You recorded the data in Chart 1 on page 35. E the data to produce a Graph that will clearly show how the effects Ion the resting membrane potential when the KEF concentration of Is high and when the KEF concentration of An+ is low. …