Golgi apparatus

Question 1A: Compare and contrast the general structure of a virus and a bacterium. Bacteria and viruses both do not contain a DNA enclosing nucleus; however, these organisms differ greatly in the complexity of their structures. Generally a bacterium is encompassed within a semi-rigid cell wall made of peptidoglycan, which provides structural support. It is classified as gram positive if its cell wall is thick and stains purple when tested for identification. If its cell wall is thin and stains…

All cells are derived from pre-existing cells - through the process of meiosis and mitosis 4. In a multicellular organism, the activity of the entire organism depends on the total activity of its independent cells 3 Significance of technological advances to developments in the cell theory Assess the impact of technology including the development of the microscope on the development of the cell theory The development of cell theory has been heavily impacted by the improvement of technology. The…

eukaryotic cell, continuous with the nuclear membrane. It usually has ribosomes attached and is involved in protein and lipid synthesis Ribosomes: small structures in the cytoplasm of a cell where mRNA is translated into an amino acid chain. Golgi apparatus: a complex of vesicles and folded…

1.0 Introduction – What is diabetes Mellitus? Diabetes mellitus is a progressive disorder of chronic hyperglycaemia due to insulin deficiency or resistance and in some cases both which affects people of all ages. The chronic hyperglycaemia causes a range of macro- and microvascular complications. Macrovascular damage leads to increased prevalence of heart disease, stroke and peripheral vascular disease whereas microvascular complications can cause diabetic retinopathy, neuropathy and…

Sandra Peart. Biology Assignment 2 Task1 AC1.1 Major Components & Function of Blood. The four major Blood Components are •Plasma •red cells •white cells •platelet •Plasma is the liquid part of the blood that is made up of 55% fluid, this is the blood’s liquid medium, by itself is straw-yellow in colour. The total volume of blood plasma is about 2.7-3.0 litres in human. The plasma carries carbon dioxide , hormones and waste. •Red blood cells •The red blood cells are called…

The nervous system makes it possible for animals to know and react to the environment around them. A change or event that evokes a specific functional reaction in an organ or tissue is a stimulus. There can either be an internal or an external stimulus. Internal stimulus being something like hunger or pain, while external is more along the lines of a sound or an odor. The nervous system interprets stimuli and orders other organ systems to respond. The nervous system does so through using sensory…

Figure 1: Shows the gene expression changes found in Arabidopsis after the insertion of the IRX1, IRX3, and IRX5 mutants(Brown). 1A shows the principal component data collected from the targeted areas of the plant(Brown). 1B shows a comparison of gene expression of the base and tip of the stem and the change of level(Brown). 1C shows the slope of genes most likely to be related to IRX3(Brown). From Figure 1B, it is shown through analysis that there are several hundred genes that show an increase…

In Metaphor and Thought, Hugh Petrie and Rebecca Oshlag argue that “metaphor is one of the central ways of leaping the epistemological chasm between old knowledge and radically new knowledge” (Petrie and Oshlag 583). Scientists compare cognitive domains in order to apply widely “idealized cognitive models” to previously unexplained natural phenomena (Kövecses 173). In absorbing “truly new forms of knowledge and understanding,” learners construct, reject, and accept metaphorical comparisons of…

Ribosomes are the actual site of protein synthesis (Marieb P44). The packaging of proteins and other substances that are being ready to be exported out of the cell and into the plasma membrane is done by the golgi apparatus. From there, the plasma membrane has two processes of exportation, active and passive processes. Passive transport has two important processes known as diffusion and filtration, diffusion being most important because it is the means of transportation…