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Biochemistry Flashcards

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10995422653biochemistrythe study of the chemistry of living things0
10995426034matter1. anything that has mass and takes up space 2. 3 forms/states: solid, liquid, gas1
10995439185solida form of matter with tightly packed atoms and a definite shape2
10995445339liquida form of matter with spaced apart atoms that takes the shape of the container it's in3
10995461815gasa form of matter with the most spaced apart particles that takes the shape of the container it's in4
10995468538atomsthe smallest pieces of matter; made of subatomic particles5
10995476955subatomic particles1. make up atoms 2. 3 types: protons, neutrons, electrons6
10995484775protonssubatomic particle with a positive charge found in the atom's nucleus7
10995497792electronsubatomic particle with a negative charge found within the nucleus of an atom8
10995503629neutronsubatomic particle with a neutral charge that is located outside of an atom's nucleus9
10995512411molecule1. a substance composed of two or more atoms 2. ex: H₂O, O₂, CO₂, N₂, NaCl, HCl, H₂SO₄, C₆H₁₂O₆10
10995566278compound1. a substance composed of two or more different atoms 2. ex: H₂O, CO₂, NaCl, HCl, H₂SO₄, C₆H₁₂O₆ 3. all ________________s are molecules, but not all molecules are ___________s11
10995648198elementa pure substance made of only one kind of atom12
10995659025elements of living things1. Carbon 2. Hydrogen 3. Oxygen 4. Nitrogen 5. Phosphorus 6. Sulfur13
10995675477ways to represent molecules or compounds1. chemical formula 2. structural formula 3. ball and stick model 4. space filling model14
10995712286chemical formulatells us atom types in a molecule and the number of atoms in a molecule15
11014450339chemical bondsoccur when atoms interact using their electrons16
11014457396covalent bonds1. this bond holds atoms together when atoms share one or more pairs of electrons 2. most biological molecules (carbs, lipids, nucleic acids, and proteins) are held together with these strong bonds 3. one carbon atom can form 4 ______________ __________17
11014505823ionic bonds1. this type of interaction between atoms occurs when atoms transfer an electron back and forth between them 2. these bonds are weak, and when they are broken, the atoms involved are called ions 3. NaCl (salt) is held together with __________ ____________ NaCl -------> Na⁺ Cl⁻ (water)18
11014592846hydrogen bonds1. these bonds occur when weak hydrogen bonds with a very strong atom like oxygen or nitrogen 2. these bonds hold water molecules and DNA strands together 3. these are weak bonds individually, but are strong in greater numbers19
110146400042 types of compounds1. organic 2. inorganic20
11014647488organic compoundscompounds with both carbon and hydrogen atoms ex: CH₄, C₆H₁₂O₆, carbohydrates, lipids, proteins, nucleic acids21
11014680408inorganic compoundscompounds/molecules that never contain both carbon and hydrogen atoms together ex: H₂O, NaCl, CO₂, HCl, NaOH (usually include acids, bases, salts, and minerals)22
11052139246polymer1. a macromolecule made of repeating subunits called monomers/monosaccharides/simple sugars/building blocks 2. carbs, proteins, and nucleic acids are considered _________________s23
11052168835carbohydrates1. made of atoms of C, H, and O 2. 2:1 ratio of H to O (ex: C₆H₁₂O₆) 3. energy source for organisms 4. foods rich in __________________________: bread, pasta, potatoes, cereal, granola bars, desserts, candy, rice, fruits veggies, oats24
11052247051monosaccharidesglucose and fructose25
11052260612disaccharidessucrose, lactose26
11052264441polysaccharidescomplex carbs, like starch, cellulose, glycogen27
11052276483sucrosewhite sugar28
11052283625-osemost carb names end in __________-29
11052291996ringcarbohydrates have a _________ structure30
11052311033glucose31
11052317335starcha glucose-storing polysaccharide; plants use excess glucose made through photosynthesis and synthesize _______________32
11052341961cellulosea structural polysaccharide found in cell walls33
11052365859hydro-means "water"34
11052365860-lysisto split/break apart35
11052376017hydrolysis1. a polymer or macromolecule is broken down into its monomers by adding water molecules and an enzyme 2. digestion 3. the opposite of dehydration synthesis36
11052424567water and proteinthe human body is made mostly of ______________ ______ _________________; the most abundant organic compounds in organisms is protein37
11052436236protein1. made of atoms of C, H, O, N, and S 2. polymers made of amino acid monomers 3. the shape of a _______________ determines its function 4. 20 different amino acids are used in nature to build thousands of different ______________s 5. the order and arrangements of amino acids determines the type of protein 6. most abundant organic compound in the body 7. types include hormones, enzymes, antibodies, transport, receptor, motor38
11052452450dehydration synthesis1. process that builds all polymers and macromolecules in cells, like carbs, proteins, lipids, and nucleic acids 2. two molecules lose the "parts" of water and join/bond together39
11081732549lipids1. made of atoms of carbon, hydrogen, and oxygen 2. includes fats, oils, and waxes 3. building blocks are glycerol and fatty acids 4. not true polymers 5. 2 categories: phospholipids and triglycerides40
11081760821phospholipids1. structural lipids that build membranes 2. have a hydrophilic head and hydrophobic tail41
11081817109hydrophilicwater loving42
11081821084hydrophobicwater fearing43
11081824111triglycerides1. a source of long-term energy storage ("fats that make you fat") 2. composed of one glycerol and three fatty acids 3. stored under the skin of mammals/homeotherms and serve as insulation 4. 2 categories: saturated fats (triglycerides) and unsaturated fats (triglycerides)44
11081836598homeothermwarm-blooded organism45
11117905459fatty acidsvary in their hydrocarbon chain length and whether there are double bonds46
11117930585saturated fats (triglycerides)1. no double bonds in the hydrocarbon chains of its fatty acids 2. all carbons are fully saturated with hydrogen atoms 3. they are solids at room temperature 4. ex: coconut oil, butter, meat trimmings (lard) 5. most come from animals 6. AKA bad fats because they can lead to the production of excess cholesterol in our bodies and the formation of plaque build-up on our inner arterial walls - this could lead to cardiovascular diseases like heart attacks or strokes47
11117982073unsaturated fats (triglycerides)1. one or more double bonds are present in the hydrocarbon chains of fatty acids causing the molecule to "bend" or "kink" 2. liquid at room temperature 3. ex: canola oil, olive oil, vegetable oil, most plants48
11118025681hydrocarbon chain49
11135594012glycogena glucose storing polysaccharide found in mammals that is stored in muscle cells and the liver50
11152780628trans fathydrogenated vegetable oil; unsaturated fats (oils) that are treated chemically to remain solid at room temperature51
11200321619nucleic acids1. organic compounds that contain the elements of C, H, O, N, and P 2. macromolecules and polymers 3. they are DNA and RNA 4. involved in the storage, processing, and transmission of hereditary material 5. structure: made of nucleotides that consist of a phosphate group, sugar, and nitrogen bases52
11200418152nucleotidesthe building blocks/monomers/subunits of nucleic acids53
112004408025 nitrogen basesadenine guanine cytosine thymine (only in DNA) uracil (only in RNA)54
112004700108there are ______ different nucleotides55
112004850864 DNA nucleotides56
112005317824 RNA nucleotides57
11200599598sugars found in nucleotidesdeoxyribose and ribose58
11200614189DNA model59
11200747987complimentary pairing1. adenine can only hydrogen bond with thymine 2. cytosine can only hydrogen bond with guanine 3. exists in DNA60
11200773576sequencethe __________________ of nucleotides determines the specific instructions61
11200868311genomerefers to all of the DNA, genes, and chromosomes in a cell or organism62
11200921324good sources of protein-eggs -beans -meat (beef, pork, chicken, turkey, fish) -peanuts and all nuts -milk -animal products -tofu (soy beans) -chick peas63
11201118463structure of an amino acids1. every amino acid had the same basic structure with an amino group on one end and a carboxyl group on the other end 2. R = side chain -- varies among all 20 amino acids64
11201163731genea small segment of DNA on a chromosome that contains instructions on how to build proteins65
11201217400amino acids1. the building blocks of protein 2. assembled into proteins at ribosomes in our cells 3. the instructions on how to assemble the ___________ __________ lies in the sequence of nucleotides within a gene 4. dehydration synthesis occurs at ribosomes to link _________________ ____________ together an build a protein66
11201332084peptide bondcovalent bond that links amino acids together67
11201443094different bondsthe _______________ ___________ in DNA are important to its function because the strong covalent bonds keep the sugar-phosphate backbones from breaking and the weak hydrogen bonds allow DNA to be read and copied68
11220367287enzymes1. speed up chemical reactions 2. specific to certain reactions 3. biological catalysts 4. thousands of _________________ in cells 5. they are proteins => ribosomes make them 6. most end in -ase 7. usually named for their substrates 8. active sites on different _________________ are different from each other which determines their specificity69
11220432881active sitethe place where the enzyme and substrate connect70
11220459264substratethe substance with which an enzyme reacts71
11220475694enzymatic proteins1. function: selective acceleration of chemical reactions 2. ex: digestive enzymes72
11220624625structural proteins1. its function is to build and support body parts 2. ex: collagen, elastin, keratin73
11220638771storage proteins1. store amino acids 2. ex: ovalbumin in eggs, casein in milk74
11220652389transport proteins1. move substances around the body 2. ex: hemoglobin75
11220676565hormonal proteins1. coordinates an organism's activities using hormones 2. ex: insulin76
11220690727receptor proteins1. involved in cell to cell communication 2. ex: receptors in nerve cell membranes77
11220858287contractile and motor proteins1. function: movement 2. ex: actin and myosin in muscles78
11220869677defensive proteins1. work in the immune system - protection against diseases 2. ex: antibodies79

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