function to do. They are a non-protein component of an enzyme and may be organic molecules (called coenzymes) or inorganic ions. 2. (A) NAME FOUR HEAVY METALS THAT ARE TOXIC TO HUMANS. Four heavy metals that are toxic to humans are: 1. Cadmium (Cd) 2. Lead (Pb) 3. Mercury (Hg) 4. Arsenic (As) (B) EXPLAIN IN GENERAL TERMS WHY THESE HEAVY METALS ARE TOXIC TO LIFE. These heavy metals are toxic to life because they generally bind tightly and permanently to the active sites of enzymes‚ thus destroying
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This reaction involves the oxidation of iodide ions to iodine molecules which are soluble in water and are visible as a pale brown clear solution. The formation of the iodine can easily be detected because all other species in the reaction mixture are colourless. The addition of starch to the reaction mixture further enhances the colour change by forming a dark blue-black complex with the iodine. The overall ionic equation is: (the spectator ions K+ have been left out to see the electron transfer
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An unknown Girl Moniza Alvi was born in Pakistan .Her father was Pakistani and mother English. She left Pakistan when she was a baby for England. The poet is thus caught between two worlds and her poems exemplify her quest for her cultural identity. The prescribed poem appears to be set in India. Pakistan was a part of India before the partition‚ therefore the setting may be a symbolic thirst for her motherland. The title of the poem is “The Unknown Girl”‚ though it may refer to the girl in the
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article 1. the The purpose of this is knowing the types of bacteria that exist in our environment and diseases caused by them‚ and how treat it. MATERIAL AND METHODS: An unknown bacterium was handed out
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Methods of needs identification - the process The following paragraphs describe ten important steps in training needs identification and analysis. 1. Stakeholder analysis The topic on this subject (Part II - topic 2) clearly indicates how important it is to identify all possible stakeholders with an interest in the training process‚ including the identification and assessment of the training needs. Stakeholder analysis in the context of needs assessment will reveal the importance and possible
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Talent Identification Introduction The sporting industry is highly thought of and the big question is how to crack the code for making champions. Research into talent identification will considerably help on this quest to achieve the best. Talent Identification (TID) is both an Art and Science involving a complex blend of scientific knowledge and assessment‚ alongside coaching art. It is designed to proactively seek out those that possess the raw material for World Class success‚ and respond
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Metals and Halogens reactions Elements such as fluorine‚ chlorine‚ bromine‚ iodine‚ and astatine belong to Group 7‚ Halogens. At room temperature‚ fluorine is a yellow gas‚ chlorine is a pale green gas‚ bromine is a red liquid‚ and iodine is a purple solid. Astatine is a radioactive element‚ therefore it exists only in small amounts. All the halogens exist in diatomic molecules. They have high ionization energies and are the most electronegative elements. Their electron configuration ns2 np5 make
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Gold is a soft metal that is largely unreactive. Gold jewellery can lie underground for thousands of years and emerge shiny after that lengthy exposure to air‚ water‚ and other chemicals in the environment. Gold does dissolve in some solvents as indicated below and does react with halogens. The most common oxidation states of gold are Au(I) and Au(III) but there are a few examples of Au(V) (various anions [AuF6]- and [Au2F10]). The Au(III) ion has the d8configuration which gives rise to many square
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Unknown Lab Report Dr. Nathan Cahoone Microbiology 204 December 9‚ 2010 Introduction There are many reasons for knowing the identity of microorganisms. The study and test was done by applying all of the methods that have been learned so far in the microbiology laboratory class for the identification of an unknown bacterium which I was using unknown #25. Results Unknown #25 had the following morphology on a streak plate: medium sized butyrous cream colored colony. Gram-staining was utilized
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Problems with Society and Self Although the plot of Women Unknown may seem like the theme of a Bollywood movie‚ the author has implanted several different thematic ideas in this short story. One of the most important themes of this story is the value of materialistic wealth or possessions. At the introduction of this story‚ the reader is informed that Anupam’s father was a poor man who had “earned a great deal of money as a lawyer‚ but never had the leisure to enjoy his wealth.” This small‚ yet
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