Discuss about DNA related topic Essay Example | Topics and Well Written Essays - 1500 words

Discuss about DNA related topic - Essay Example DNA has come a long way since the time of the famous photo 51 of Rosalind Franklin until the three-dimensional model interpretation of Jim Watson and Francis Crick of the double helical structure of the DNA strand. Even the discovery of the DNA helix was of controversy itself as discussed in an interview of Lynn Osman Elkin conducted on March 26, 2003 posted at NOVA website regarding the confusion on who to take credit for the discovery, if double helix DNA should be more on Franklin’s account (Rosalind Franklins Legacy). Deoxyribonucleic acid is the hereditary material in humans and almost all other organisms. Most DNA is located in the cell nucleus. The information in DNA is stored as a code made up of four chemical bases: adenine (A), guanine (G), cytosine (C), and thymine (T). Human DNA consists of about 3 billion bases, and more than 99 percent of those bases are the same in all people. The order, or sequence, of these bases determines the information available for building and maintaining an organism, similar to the way in which letters of the alphabet appear in a certain order to form words and sentences (DNA interactive). Series of studies have proven the role of DNA as the gene carrier. Fred Griffith and his transforming principle experimented on mice by injecting strains of the S (smooth) and R (rough) form of the Pneumococcus bacteria. The experiment showed transformation of R from to its virulent form by somehow incorporating gene from the dead S form when mixed together. Furthermore Griffith’s experiment set out Oswald Avery and colleagues Colin Macleod and MacLyn McCarty to determine what the transforming agent was by the process of elimination ruling out DNA as the transforming material. Further experiment of Hershey and Chase proved that DNA, and not protein, is the one injected by virus into their host thus establishing DNA as the hereditary

Strong Interest Inventory Essay Example | Topics and Well Written Essays - 1000 words

Strong Interest Inventory - Essay Example s which matches the interests as well as the personal styles in relation to issues such as leadership qualities and risk taking abilities of the individuals is very important for the students as there is a strong relationship between the interests, preferences and personality. The school counselor also interacts with the students who are experiencing social or personal problems, and after identifying the issues aids them by providing counseling for achieving their academic and career goals. Due to legislative compulsions, the schools are required to update their testing programs and design new assessment methods. There are standardized tests developed by the test publishers. In the recent years new editions of the Tests of Achievement and Proficiency Batteries have been released by the reputed test publishers. They also publish interest inventory tests which broadly measure the students’ vocational or academic interests. Attitude and personality scales used for measurement cover various parameters. For example the results of the  Myers-Briggs Type Indicator  (MBTI) assessment (CPP Inc., 2004) include: Scores on the level of interest on each of the six  Holland Codes  or General Occupational Themes.  Holland Code Themes  include – Realistic, Investigative, Artistic, Social, Enterprising, and Conventional. Standardization: A standardized test conducted under standard conditions and vigilance, with specified time limits and scores are either norm or criterion referenced, and interpreted as per standards consistently. The standardized tests are useful in the assessment of academic success or achievement, and could also be effectively used for diagnostic testing in counseling for identifying weaknesses such as reading and writing skills as well. ACT, SATII, GRE, MAT, GMAT, MCAT and LSAT are some of the good examples of standardized tests. Norming: Norm refers to average level of achievement or performance in relation to a group. Norm-referenced tests