Prokaryotic & Eukaryotic Cells Cells can be divided into two categories: prokaryotic and eukaryotic cells. Prokaryotic cells are significantly smaller than eukaryotic cells. This size difference is due to the many contents inside a eukaryotic ce Continue Reading...
Eukaryotic Cell vs. Prokaryotic Cell: There are two types of cells found, that originate from a common ancestor - The prokaryotes and eukaryotes. While Prokaryotes are organisms without a cell nucleus and other membrane-bound organelles and are most Continue Reading...
living things are characterized by the following seven characteristics namely mobility, respiration, excretion, sensitivity or response to external stimulus, growth, feeding, and reproduction. Though there may be variations between animal and plant Continue Reading...
Enzymes 1. How does temperature affect enzyme function? Every enzyme demonstrates maximum activity at a particular temperature known as its optimum temperature. Generally, all enzymes are inactivated at temperatures below 10°C and get denatur Continue Reading...
Origin of Eukaryotes Theory of Endosymbiosis The evolution of eukaryotes has no fossil record. However, from the study of modern organisms, biologists deduced their theory that eukaryotes evolved from prokaryotes through the endosymbiosis process. Continue Reading...
Antibiotics Penicillin Mechanism of Action Penicillin G, when injected into the patient, will act against actively proliferating penicillin-sensitive strains of bacteria (Drugs.com, 2011). This does not include several strains of staphylococci pro Continue Reading...
Transcription is a process that genetic information on the DNA copies into RNA and the DNA acts as the template for the new molecules of RNA. Transcription process begins with the DNA double helix unwinding as the hydrogen bonds holding the opposing Continue Reading...
properties of a Carbon atom that make it ideally suited to produce varied carbon skeletons? Besides water, carbon molecules are the most significant contributors to life. The structural and functional diversity of organic molecules emerges from the Continue Reading...
Desiccation Tolerance in Prokaryotes Prokaryotes or eukaryote is the organism that makes up the microbial world. Prokaryotes are deficient of internal unit membranes and are self-sufficient cells or organisms. The best-known prokaryotic organisms ar Continue Reading...
ELL Cycle Control Cell Cycle Control The cell cycle involves a series of events that occur within a cell that results to the division of the cell and its duplication which leads to the production of two daughter cells. For prokaryotic cells-those t Continue Reading...
Disease Control. You have been called to a remote area of Uganda to study a mysterious disease that is causing respiratory ailments in a small village. You isolate a bacterium from several patients that seems like a good candidate for the pathogen. Continue Reading...
When DNA is damaged, cells can react through cell cycle checkpoints which allows repair to begin before further division can occur. There is also the prokaryotic SOS response which changes gene expression in bacteria as a result of DNA damage. This Continue Reading...
Based on the results of these assays, S. flexneri can often be identified, although additional kits may be required. The simplest way, however, may be the novel approach through multiplex PCR (mRPC). It is possible to identify Shigella species throu Continue Reading...
Given a mosquito's vastly shorter life span, preventing the spread of the infection to more human hosts greatly reduces the number of viable parasites in existence (CDC 2009). 10) There are several reasons that viral infections are more difficult Continue Reading...
" (Sukumaran, 2004) Mutation is what results in the difference and may be utilized as a measure of the time that has elapsed since separation of the species from the common ancestor during evolution. This is a method of "inferring the divergence of t Continue Reading...
These proteins include homologous members of yeast. The presences of these proteins suggest that E. histolytica is skilled to perform homologous recombination, which is the same as in other organisms. DNA damage was evaluated by TUNEL assay. In yeas Continue Reading...
The RHDl gene product appears to be necessary for proper initiation of root hairs, whereas the RHDS, RHD3, and RHD4 gene products are required for normal hair elongation. These results demonstrate that root hair development in Arabidopsis is amenabl Continue Reading...
Regional Geography Why could Africa be considered on of the richest continents on Earth? Discuss some of sub-Saharan Africa's Assets. Then address why, despite these facts, the majority of African states remain poor. Be sure to include several fact Continue Reading...
Anatomy Major cavities of the body and their organs: Our body is made up of solid structures and many cavities. The organs are packed in these cavities and they fill these cavities. The major cavities in our body are: the ventral cavity, which is s Continue Reading...
This is indirect evidence of photosynthetic organisms." (Armstrong Chapter 2, pp. 6). Thus, photosynthetic organisms have been evidenced to have existed well into the Precambrian. Another source of data concerning life in the Precambrian comes from Continue Reading...
detection of the Borna disease virus relating them to the epidemiology. The first cases of Borna disease were described in the 17-19th century in Southern Germany. It was discovered to be a fatal disease affecting the neurological systems of horses Continue Reading...
Eukaryotic Cell Try to identify the following structures in an amoeba (Fig. 4.2): Nucleus: A single, membrane-bounded oval structure. Food vacuoles: Membrane-bounded spheres that contain engulfed food. Are these present? Yes. Contractile vacuole Continue Reading...
