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The Leaving Certificate Examination (Irish: Scrúdú na hArdteistiméireachta), commonly referred to as the Leaving Cert or (informally) the Leaving (Irish: Ardteist), is the final exam of the Irish secondary school system and the university matriculation examination in Ireland.
The photosynthetic efficiency (i.e. oxygenic photosynthesis efficiency) is the fraction of light energy converted into chemical energy during photosynthesis in green plants and algae. Photosynthesis can be described by the simplified chemical reaction 6 H 2 O + 6 CO 2 + energy → C 6 H 12 O 6 + 6 O 2
Photosynthesis usually refers to oxygenic photosynthesis, a process that produces oxygen. Photosynthetic organisms store the chemical energy so produced within intracellular organic compounds (compounds containing carbon) like sugars, glycogen , cellulose and starches .
The light excites an electron in the pigment P680 at the core of photosystem II, which is transferred to the primary electron acceptor, pheophytin, leaving behind P680 +. The energy of P680 + is used in two steps to split a water molecule into 2H + + 1/2 O 2 + 2e - ( photolysis or light-splitting ).
The new leaving certificate grading system involves grades such as H1, H2, O1, O2, etc. Leaving Certificate results are measured by the number of 'points' awarded to the student. It is usually the number of points awarded to the student that forms the basis for the student's acceptance or otherwise into a course of higher education (e.g. a ...
This is one of two core processes in photosynthesis, and it occurs with astonishing efficiency (greater than 90%) because, in addition to direct excitation by light at 680 nm, the energy of light first harvested by antenna proteins at other wavelengths in the light-harvesting system is also transferred to these special chlorophyll molecules.
A new HGTV designer is taking the reins on Love It or List It!. Following longtime co-host Hilary Farr's announcement that she was leaving the show in 2023 after 19 seasons, the long-running HGTV ...
C 4 photosynthesis reduces photorespiration by concentrating CO 2 around RuBisCO. To enable RuBisCO to work in a cellular environment where there is a lot of carbon dioxide and very little oxygen, C 4 leaves generally contain two partially isolated compartments called mesophyll cells and bundle-sheath cells.