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  2. List of secondary education systems by country - Wikipedia

    en.wikipedia.org/wiki/List_of_secondary...

    Often secondary programs are divided into two programs: middle school and high school. Generally, middle school comprises grade 6 (age 11–12), grade 7 (age 12–13), and grade 8 (age 13–14), while high school comprises grade 9 (age 14–15) through grade 12 (age 17–18). Many schools use a variation of the structure; these decisions are ...

  3. Twelfth grade - Wikipedia

    en.wikipedia.org/wiki/Twelfth_grade

    Twelfth Grade (also known as 12th Grade, Grade 12, Senior Year, Standard 12, 12th Standard, 12th Class, or Grade of the 12th) is the twelfth and final year of formal or compulsory education. It is typically the final year of secondary school and K–12 in most parts of the world. Students in twelfth grade are usually 16-18 years old.

  4. Adenosine triphosphate - Wikipedia

    en.wikipedia.org/wiki/Adenosine_triphosphate

    At cytoplasmic conditions, where the ADP/ATP ratio is 10 orders of magnitude from equilibrium, the ΔG is around −57 kJ/mol. [12] Along with pH, the free energy change of ATP hydrolysis is also associated with Mg 2+ concentration, from ΔG°' = −35.7 kJ/mol at a Mg 2+ concentration of zero, to ΔG°' = −31 kJ/mol at [Mg 2+ ] = 5 mM.

  5. Cellular respiration - Wikipedia

    en.wikipedia.org/wiki/Cellular_respiration

    The ATP generated in this process is made by substrate-level phosphorylation, which does not require oxygen. Fermentation is less efficient at using the energy from glucose: only 2 ATP are produced per glucose, compared to the 38 ATP per glucose nominally produced by aerobic respiration. Glycolytic ATP, however, is produced more quickly.

  6. Grading systems by country - Wikipedia

    en.wikipedia.org/wiki/Grading_systems_by_country

    The English 3 is equivalent to a D to a high E in the old grading system. 2: E: The English 2 is equivalent to a low E to an F in the old grading system. F: 1: G: Equivalent to a G in the old grading system. U: U: Equivalent to a U in the old grading system. This is awarded to those who failed the subject. X: X

  7. ATP rankings - Wikipedia

    en.wikipedia.org/wiki/ATP_rankings

    The ATP Race is an annual performance-based points race to determine the qualifiers for the year-end championship, in addition to the year-end No. 1 singles player and doubles team. The race, initially called the "ATP Champions Race", was introduced by the ATP for the 2000 season as part of their "21st Century Tennis" strategy announced in 1999 ...

  8. Bake Irish Beer Into a Chocolate Guinness Cake on St. Paddy's Day

    www.aol.com/bake-irish-beer-chocolate-guinness...

    Spray a 10- or 12-cup Bundt pan with baking spray with flour. Pour the batter into the prepared pan. Bake until a wooden pick comes out with a few moist crumbs, 45 to 50 minutes.

  9. Substrate-level phosphorylation - Wikipedia

    en.wikipedia.org/wiki/Substrate-level_phosphory...

    Substrate-level phosphorylation exemplified with the conversion of ADP to ATP. Substrate-level phosphorylation is a metabolism reaction that results in the production of ATP or GTP supported by the energy released from another high-energy bond that leads to phosphorylation of ADP or GDP to ATP or GTP (note that the reaction catalyzed by creatine kinase is not considered as "substrate-level ...