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- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/02%3A_The_Molecules_of_Life/2.08%3A_EnantiomersThis page explains the tetrahedral arrangement of carbon atoms forming four covalent bonds, exemplified by methane. It discusses how the presence of different groups around carbon can lead to enantiom...This page explains the tetrahedral arrangement of carbon atoms forming four covalent bonds, exemplified by methane. It discusses how the presence of different groups around carbon can lead to enantiomers, using alanine as an example of L- and D- formations, emphasizing the predominance of L amino acids in protein synthesis. Chirality's importance is highlighted, noting that a protein's functionality depends on its shape.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/04%3A_Cell_Metabolism/4.11%3A_MetabolismThis page explains that all living organisms rely on energy and matter, processed through metabolism, which includes catabolism (breaking down molecules) and anabolism (building larger molecules). Aut...This page explains that all living organisms rely on energy and matter, processed through metabolism, which includes catabolism (breaking down molecules) and anabolism (building larger molecules). Autotrophs, like plants, create organic molecules via photosynthesis, whereas heterotrophs, such as humans, obtain energy by consuming organic matter.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/15%3A_The_Anatomy_and_Physiology_of_Animals/15.01%3A_Nutrition/15.1B%3A_MetabolismThis page discusses the essential role of metabolism in living organisms, which involves energy and matter transformation. It outlines two metabolic processes: catabolism (breaking down molecules for ...This page discusses the essential role of metabolism in living organisms, which involves energy and matter transformation. It outlines two metabolic processes: catabolism (breaking down molecules for energy) and anabolism (building larger molecules). Autotrophs, such as plants, synthesize organic molecules through photosynthesis, while heterotrophs, including humans, derive energy from organic matter.
- https://bio.libretexts.org/Bookshelves/Biochemistry/Fundamentals_of_Biochemistry_(Jakubowski_and_Flatt)/01%3A_Unit_I-_Structure_and_Catalysis/01%3A_The_Foundations_of_Biochemistry/1.02%3A_Chemical_FoundationsThe page provides an overview of organic molecules, focusing on various functional groups fundamental to understanding biochemistry. It details different classes of organic compounds, such as alkanes,...The page provides an overview of organic molecules, focusing on various functional groups fundamental to understanding biochemistry. It details different classes of organic compounds, such as alkanes, alkenes, alkynes, aromatics, alcohols, phenols, thiols, ethers, sulfides, amines, phosphates, aldehydes, ketones, and carboxylic acids, describing their structures and reactions.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/02%3A_The_Molecules_of_Life/2.02%3A_HydrocarbonsThis page discusses hydrocarbons, organic compounds made of carbon and hydrogen, categorized into aliphatic (linear chains) and aromatic (ring structures). Aliphatic hydrocarbons include saturated com...This page discusses hydrocarbons, organic compounds made of carbon and hydrogen, categorized into aliphatic (linear chains) and aromatic (ring structures). Aliphatic hydrocarbons include saturated compounds like methane and unsaturated types like ethylene. Aromatic hydrocarbons are based on benzene rings and occur in biological molecules, including amino acids, cholesterol, and hormones. Beta-carotene is highlighted as a hydrocarbon containing both aliphatic and aromatic components.
- https://bio.libretexts.org/Bookshelves/Introductory_and_General_Biology/Biology_(Kimball)/18%3A_Evolution/18.10%3A_MarsThis page discusses NASA's Viking missions, which sought evidence of life on Mars in 1976 but found none conclusively. The ambiguous results of the Labeled-Release and Gas-Exchange experiments were la...This page discusses NASA's Viking missions, which sought evidence of life on Mars in 1976 but found none conclusively. The ambiguous results of the Labeled-Release and Gas-Exchange experiments were later linked to nonbiological processes. Although the Curiosity rover discovered organic compounds and Martian meteorites like ALH84001 contain organic molecules, the potential for contamination complicates the findings.
