Podcast
Boundless Biology by Lukas Waller
Hosted by Lukas Waller · EN
Ace Grade 12 University Biology (SBI4U). Content covers all nescassary knowledge of all processes and material involved in this difficult course. Hosts Lukas and Tammy will teach you this Grade 12 University Biology (SBI4U) in a format you can listen to whenever you go, weather it be on your commute, at the gym, or while studying your notes.
13episodes
Episodes
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3.3 - Calvin Cycle (LIR)
Nov 10, 202400:12:46Tap to summarizeLocation: Takes place in the stroma of the chloroplast. Phases of the Calvin Cycle: Carbon Fixation: Reduction Phase: Regeneration of RuBP: Key Enzyme: RuBisCO is the primary enzyme, acting as both a carboxylase and an oxygenase. Can bind to CO₂ (carboxylation) or O₂ (oxygenation), the latter leading to photorespiration, which reduces efficiency. Energy Requirement: For each full turn of the cycle (producing 1 G3P): To produce one glucose molecule, the cycle must run twice, requiring: Products: G3P is the direct product, which can be used to form glucose and other carbohydrates. Photorespiration Issue: Occurs when RuBisCO fixes O₂ instead of CO₂, leading to wasteful energy loss. More likely in hot, dry climates when stomata close to conserve water. Adaptations: C4 and CAM plants have evolved mechanisms to minimize photorespiration and improve efficiency, which will be explored further.
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3.2 - Light Dependent Reactions
Nov 10, 202400:12:00Tap to summarizeThings To Remember Cyclic Photophosphorylation occurs as a means to produce additional ATP rather than ATP and NADPH. This is because the Calvin Cycle (next episode) requires more ATP than NADPH. PSI = Photosystem 1, PSII = Photosystem 2 Diagrams Noncyclic Photophosphorylation: https://cdn.kastatic.org/ka-perseus-images/faeb1179a538a3a8106fa5f3b9bd90c92f9834a7.png Cyclic Photophosphorylation: https://cdn.kastatic.org/ka-perseus-images/d47991f2cf9c7a4fc22f055b60793af8c341991f.png Quizzes https://quizlet.com/30876000/light-dependent-reactions-light-independent-reactions-flash-cards/
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3.1 - Intro to Photosynthesis
Nov 10, 202400:08:21Tap to summarizeKey Terms, try drawing these out. A) Leaf Anatomy palisade layer cuticle layer spongy layer vascular bundle (xylem/phloem) stomata guard cells epidermis (upper/lower) B) Chloroplast Anatomy membrane (inner/IMS/outer) thylakoid membrane thylakoid lumen thylakoid lamella granum C) When do stomata open and how do they do so? Topics not covered in-depth: Sunlight triggers [K+] ion movement which requires ATP from the plant in order to open guard cells.
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