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Prior to this, around 1996, Combined Science GCSEs were available as an alternative to three separate Sciences for many exam boards. Combined Science consists of either Higher Tier (HT) or Foundation Tier (FT) papers AQA offer two different specifications entitled Synergy and Trilogy. [2]
For GCSE Science the old single-award ‘science’ and ‘additional science’ options are no longer available, being replaced with a double award ‘combined science’ option (graded on the scale 9–9 to 1–1 and equivalent to 2 GCSEs). Alternatively pupils can take separate qualifications in chemistry, biology and physics.
The combined codes used were GF13 [6] and FG31. [7] The codes GFD3, GF1H and GFH1 were also used. [8] [9] [10] Another example was Music and Philosophy. The principal subject codes were W3 (Music) and V5 (Philosophy). The combined codes used are WV35 [11] or VW35, [12] while WV53, [13] was also used.
The examination boards Edexcel, Learning Resource Network (LRN), and Oxford AQA also offer their own versions of International GCSEs. Students normally begin studying the syllabus at the beginning of Year 10 and take the test at the end of Year 11.
The O grade was equivalent to a GCE Ordinary Level pass which indicated a performance equivalent to the lowest pass grade at Ordinary Level.. Over time, the validity of this system was questioned because, rather than reflecting a standard, norm referencing simply maintained a specific proportion of candidates at each grade, which in small cohorts was subject to statistical fluctuations in ...
Microbes are ideally suited for biochemical and genetics studies and have made huge contributions to these fields of science such as the demonstration that DNA is the genetic material, [49] [50] that the gene has a simple linear structure, [51] that the genetic code is a triplet code, [52] and that gene expression is regulated by specific ...
The paradigm shift does not merely involve the revision or transformation of an individual theory, it changes the way terminology is defined, how the scientists in that field view their subject, and, perhaps most significantly, what questions are regarded as valid, and what rules are used to determine the truth of a particular theory.
In gene conversion, a section of genetic material is copied from one chromosome to another, without the donating chromosome being changed. Gene conversion occurs at high frequency at the actual site of the recombination event during meiosis. It is a process by which a DNA sequence is copied from one DNA helix (which remains unchanged) to ...