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Essay: Cellular respiration - Essay UK Free Essay Database, Essay on cellular respiration

Essay on cellular respiration

Respiration and photosynthesis both involve redox reactions. During respiration, energy is released when electrons and hydrogen are transported. Electrons lose potential energy as they go down the electron transport chain towards oxygen to form water, and the energy is then used to synthesize ATP. ‘Photosynthesis reverses the direction of electron flow, electrons are transferred along with hydrogen ions from water to carbon dioxide reducing it to sugar. Electrons increase in potential energy when moving from water to sugar, so the process requires energy’ provided by light, unlike respiration. (Reece, et al., 2011)

Introduction Every cell needs a source of energy in order to perform their daily functions. However the process to get this energy is different for plant and animal cells. Plants…

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Heterotrophs are single or multi-celled organisms that cannot capture the energy of the sun directly through the process of photosynthesis. As a result heterotrophs are considered to be consumers in the food chain. In the following experiment this specific fact has an important meaning. Goldfish is an aerobic heterotroph, which cannot produce O 2 .When put into the water or any other substance, goldfish will use O 2 instead to stay alive. As a result the amount of O 2 in the water will decrease and the amount of CO 2 will increase depending on the time the fish is in the water.

By 2009, it had become clear that, at some point, 3G networks would be overwhelmed by the growth of bandwidth-intensive applications, such as streaming media . [10] Consequently, the industry began looking to data-optimized fourth-generation technologies, with the promise of speed improvements up to ten-fold over existing 3G technologies. The first two commercially available technologies billed as 4G were the WiMAX standard, offered in North America by Sprint , and the LTE standard, first offered in Scandinavia by TeliaSonera .

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Modern cell phones networks use cell as radio frequencies are limited, shared resource, base stations and handsets change frequency and use low power transmitters in order that limited number of radio frequency can be used at the same time by many users with less interferences.

Mobile phones have become a source of unlimited entertainment. The things which we never thought would be present in a mobile phone are now possible. Smartphones have come into existence which not only help you in making calls but also help you to stay entertained by allowing you to play games, listen to music and do lots of other stuff.

As mobile phones became more popular, they began to cost less money, and more people could afford them. Monthly plans became available for rates as low as US$30 or US$40 a month. Cell phones have become so cheap to own that they have mostly replaced pay phones and phone booths except for urban areas with many people.

However, with the introduction of the first crude light microscopes, investigators began to exam­ine small organisms, tissues cut from plants or re­moved from animals, and the “animalcules” in pond water. The invention of the microscope and its gradual improvement went hand-in-hand with the develop­ment of the cell doctrine. It finally became apparent that a fundamental similarity existed in the structural organization of all the living things studied.

The carbon dioxide produced inside cells diffuses out into blood and finally eliminated through the respiratory system. From the foregoing discussion, it is clear that ATP is the energy currency of the cell. However, it should be noted that ATP does not store energy, but rather transfers it to points in a cell requiring it. The process of cellular oxidation is represented by the following reactions:

In the lab the relative volume of O2 consumed by germinating and non-germinating peas at room temperature and 10ËšC was determined. The central purpose was to find the affect of germination and temperature on the rate of cellular respiration. The results indicated that the respirometers that contained germinated peas had a greater rate of cellular respiration compared to those with non-germinating and showed that cellular respiration was faster at 10ËšC. The experiment demonstrated the affect of environmental factors on cellular respiration.

The first substantial impact of using cell phones is the ease of communication among people. Unlike the landlines, mobile phones are portable, and one can use them in whichever location he or she is as long as there is network coverage.  Most people prefer cell phones to landlines due to their convenience and their abilities to send a short message services (SMS). Cell phones enables business people do their work by maintaining correspondence with customers, suppliers, business partners and financial institutions. They have also enabled families retain kinship ties especially due to geographical differences.

What the mobile phones are meant for? Yeah, you answered it right- for communication. So the first and foremost role that mobile phones play in our lives is that they provide us an easy and fast way of communication. Go wherever you want, whenever you want; your mobile phone will stay you connected with all. Got an important message for your friend/family member? Just send instant SMS or call straight away and make your important message reach the intended person in no time. Simple!


Essay on cellular respiration

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essay on cellular respiration
essay on cellular respiration

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