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Indicate whether each of the following statements about covalent bonds is true or false. 1. A water molecule is held together by two single polar covalent bonds. 2. Because oxygen has a greater electronegativity than hydrogen, water molecules are polar with two partial negative charges near the oxygen atom and one partial positive charge near each hydrogen atom. 3. Atoms differ in their affinity for neutrons, a property called electronegativity. 4. In general, electronegativity increases from left to right across each row of the periodic table and also increases down each column. 5. In a nonpolar covalent bond there is an equal sharing of electrons between two atoms while polar covalent bonds involve an unequal sharing of electrons. 6. A single molecule of oxygen (O2) is held together by two double nonpolar covalent bonds. 7. A covalent bond is formed when two atoms share one or more pairs of electrons. 8. Polar molecules are electrically neutral but the distribution of charge within the molecule is not uniform. 9. Although C and H differ slightly in electronegativity, this small difference is negligible, and C-H bonds are considered polar. 10. Of the 4 most common elements found in living organisms, nitrogen has the highest electronegativity and, therefore, the greatest affinity for electrons. 11. A slightly positive hydrogen atom on one water molecule can attract the slightly negative oxygen atom on a different water molecule, leading to the formation of a hydrogen bond.
Describe the major difference between Immunofluorescence and Western blotting techniques.
What is meant by the 'cloning of a gene'? (Explain what it means from the perspective of the host bacteria)
Considering geographic distribution, physical environmental conditions, symbiosis, alpha- and beta diversity, and any other factors you consider relevant, describe and explain in some detail the unique conditions associated with hermatypic coral e..
Mary has a genetically linked immunodeficiency. Unlike many such patients, who had recurrent infections with several gram-negative and/or gram-positive bacteria, Mary has only presented with infection with Neisseria meningitidis. Why is a phagocyt..
Which of the following statements accurately describes the culture media necessary for growing Clostridium tetani? A.) A chemically defined medium is one made up of extracts such as those from yeasts, meat, or plants whose exact chemical compositi..
What are the disadvantage and advantage of each and which commonly applies to hospitality industry. How is this caused by the sympathetic nervous division.
In a generalized transduction experiment, phages are collected from an E. coli donor strain of genotype cys+ leu+ thr+ and used to transduce a recipient of genotype cys- leu- thr-.
How do both meiosis and sexual reproduction (fertilization) produce offspring that differ genetically from the parents? Be sure to talk about the two specific steps in meiosis that increase variability as well as process of fertilization.
Two of the seven different pea traits examined by Mendel involved genes that we now know are linked. Knowing this, can you explain why Mendel was still able to use results from his crossing experiments to develop the principle of independent assor..
How could production of a packetlike spermatophore contribute to the evolutionary success of leeches in their environment?
a woman with type A blood has a child with type O blood. three men claim to be the father. Man 1 has B blood type, Man 2 has type O blood, and Man 3 has AB type blood. who is the father?
Explain about the cell wall and nucleoid of bacterial cell, their structure and composition in detail. Explain the functions of the sensory neurons, interneurons, and motor neurons in the nervous system in brief.
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