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24 Cards in this Set
- Front
- Back
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What is the global definition of life?
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A system capable of Darwinian evolution: reproduces with inheritance and variation
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What is the local definition of life?
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Life is a system in which proteins and nucleic acids interact in ways that allow the structure to grow and reproduce
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Evolution is
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a change in inherited traits over the course of generations
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What did Darwin contribute to the evolutionary theory
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All species on earth are related and only the fittest survive
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Who is the ancestor of mom gma and bacteria?
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None -- they're all currently living so none are oldest ancestor
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How would you define a molecule?
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An entity containing two or more molecules CREATED BY CHEMICAL reactions
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What is covalent bonding?
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When two atoms share a pair of electrons between them -- varies depending on the atom and their amounts of electrons
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Why is carbon the most important element to life as we know it?
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because it can make the most covalent bonds, 4, so it can bond multiple atoms
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What is the structure of a water molecule?
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Water has 2 hydrogen atoms that covalently bond to one oxygen
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What is hydrogen bonding?
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Electrostatic interactions between water molecules -- not as strong as covalent
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why is hydrogen bonding so important to life?
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Because of the states of water ice is less dense so life can continue living beneath ice
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What are the four classes of biomolecules?
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Carbohydrates, Lipids, Proteins, Nucleic Acids
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What are these biomolecules' building blocks?
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monosacchrides, triglycerides, amino acids, nucleotides
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Name the 3 elements found in all biomolecules?
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Oxygen, hydrogen, carbon
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what unique element is found in proteins/amino acids?
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nitrogen
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What two unique elements are found in nucleic acids?
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nitrogen and phosphorous
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What are the functions of the 4 classes of biomolecules?
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nucleic= encoding genetic info
proteins = catalysts, repairs carbs= gives eneregy, regulates blood glucose fats = stores energy, insulation |
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What is metabolism?
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Chemical reactions within the body that allows body to function
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what do you understand with BEE?
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It calculates the minimum amount of energy needed for you to carry out basic bodily funcitons
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reactants and products of photsynthesis?
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Reactants: Water, Sunlight (energy), carbon dioxide
Products: Oxygen, Simple sugars |
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what were the conclusions of Redi, Spallanzi, and Pateur's experiment?
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It was not good evidence for claiming life didn't come from non life because not nearly enough accurate representation of life at the start of time
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What is the central Dogma?
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framework for understanding transfer of sequence information from DNA to RNA to protein
(transcription -> translation ->cell machinery) |
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what features are in all cells?
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Membranes, create energy, replicate, nuclei
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Prokaryote vs Eukaryote
size DNA Organelles? Nucleus reproduction |
size: prok: 1-10 Mm euk: 10-100 Mm
DNA: Prok: circular chromosome euk: many linear chromosomes Organelles? Prok: No Euk: yes Nucleus? Prok: No Euk: yes Reproduction? Prok: No Euk: Meiosis |
