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Pre-AP Biology Midterm Flashcards

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8439298430ScienceAn organized way of gathering and analyzing evidence about the natural world0
8439298433BiologyThe study of life1
8439298434Quantitative DataData measured with numbers2
8439298435Qualitative DataData measured by descriptions3
8439298436ObservationUsing your five senses to obtain information4
8439298437InterferenceMaking a conclusion from an observation or evidence5
8439298438Scientific Method steps1.) Make and observation 2.) Form a question 3.) Form a hypothesis 4.) Conduct an experiment 5.) Analyse and draw a conclusion6
8439428345Controlled ExperimentExperiment in which only one variable is changed7
8439463003What are the variables in a controlled experimentIndependent, Dependent, and Controlled8
8441215812Independent VariableA variable that is intentionally changed to observe its effect on the dependent variable9
8441241900Dependent variableThe event studied and expected to change when the independent variable is changed10
8439482905Control GroupA group separated from the rest of the experiment where the independent variable being tested is not exposed11
8439498183Characteristics of Life1.) Responsiveness to the environment 2.) Growth and change 3.) Ability to reproduce 4.) Have a metabolism and breathe 5.) Maintain homeostasis 6.) Being made of cells 7.) Passing traits onto offspring12
8439532562Unicellular OrganismProkaryotic (Single celled so it has one function)13
8439533967Multi-cellular OrganismEukaryotic (Different cells that perform different functions)14
8439563657Sexual Reproduction vs Asexual ReprodutionAsexual is the creation of offspring from a single person and does not involve the joining of gametes, while sexual does and results in the creation of a being that is unique15
8439576656GrowthPermanent increase in size and dry mass of an organism16
8439584336DevelopmentIncrease in complexity of an organism17
8439621457MacromoleculeMolecules composed of thousands of atoms: the four main classes being carbohydrates, lipids, proteins, and nucleic acids18
8439621458PolymerChain-like molecules, consisting of many similar or identical building blocks linked by covalent bonds19
8439670870Dehydration SynthesisTwo or more smaller molecules are combined to form 1 larger molecule20
8439670871HydrolysisOne large molecule is broken apart with H₂O to form two or more smaller molecules21
8439684287Describe the three main functions of carbohydrates1.) Short-term energy storage (source of energy for cells) 2.) Provide structure in plants, some animals, and other organisms 3.) Provide energy through oxidation22
8439707141Describe the formula of a monosaccharideThey have the general molecular formula- (CH2O)n, where n can be 3, 5 or 623
8439769140CelluloseA polysaccharide made up of beta glucose monomers24
8439890006Chitina structural polysaccharide in exoskeleton of bugs, crustaceans, etc.25
8439914384How are lipids distinguishable from all the other macromoleculesLipids aren't soluble in water and they don't form long sequences made up of similar or repeating smaller units26
8439957933Why are lipids considered macromolecules, not polymersLipids are formed when a glycerol molecule combines with compounds called fatty acids27
8439987059Describe the three main types of fats and oilsIt provides energy, absorbs certain nutrients and maintains your core body temperature28
8440070536Triglyceride structuremade of glycerol and 3 fatty acids29
8440093164Saturated vs Unsaturated FatsSaturated: solid at room temperature and has no double bonds between carbon atoms Unsaturated fats: liquid at room temperature and has at least one double bond between carbon atoms (Lowers risk of heart disease)30
8440134441Phospholipidmakes up your cell membranes and is critical to a cell's ability to function.31
8440148335How do phospholipids vary from triglyceridestriglyceride contains three fatty acids attached to the glycerol backbone, while a phospholipid has two fatty acids plus a phosphate group attached to the glycerol32
8440224577Explain how phospholipids align themselves to form cell membranesPhospholipids in the plasma membrane are arranged in two layers, called a phospholipid bilayer33
8440241171Describe the function of a hormoneThey control and coordinate activities throughout the body34
8440394869What happens when you have too much cholesterol in the blood?It starts to build up in the arteries called atherosclerosis35
8440427977Explain why there can be 100,000 different proteins but only 20 amino acidsProteins are the building blocks of amino acids36
8440462287Polypeptide Formationa single linear chain of many amino acids, held together by amide bonds. A protein consists of one or more polypeptides (more than about 50 amino acids long)37
8440503613What are the six main functions of proteins1.) Structural Support 2.) Movement 3.) Signal Transduction 4.) Binding 5.) Molecule transport across membranes 6.) Catalysis38
8440515683What are the names of the 4 levels of protein structureprimary, secondary, tertiary, and quaternary structure39
8440540694what are some examples of a protein that has multiple subunitshemoglobin, DNA polymerase, and ion channels40
8440622499Explain what enzyme action is and why every enzyme doesn't fit every substrateOne molecule of the enzyme can cause a million molecules of carbon dioxide to react in one second and a substrate will only fit an active site of particular enzyme41
8440647438DNA vs RNADNA: double-stranded, has deoxyribose sugar, contains thymine RNA: single-stranded, has ribose sugar, contains uracil42
8440684711Explain the significance of base pairing and how purines and pyrimidines are integralThe base pairing rule states that adenine pairs only with thymine and guanine pairs only with cytosine, and Purine bases bond to pyrimidine bases43
8440714246Why is "you are what you eat" so trueit is important to eat good food in order to be healthy and fit44
8440720969What is a cellBasic building blocks of all living things45
8440723437What are the three parts of the cell theory1.) All known living things are made up of one or more cells. 2.) All living cells arise from pre-existing cells by division 3.) Cells are the fundamental unit of structure and function in all living organisms46
8440765993What scientist first used the term cell and whyRobert Hooke saw a series of walled boxes that reminded him of the tiny rooms, or cellula, occupied by monks47
8440785849Eukaryotes vs ProkaryotesEukaryotes: (composed of cells) contain membrane-bound organelles, including a nucleus Prokaryotes: (composed of cells) do not contain a nucleus or any other membrane-bound organelle48
8440817878Where do prokaryotes keep their DNA? Eukaryotes?Prokayotes: DNA floats inside the cell Eukaryotes: DNA is found in the nucleus49
8440849954Membrane-Bound OrganelleOrganelles that are surrounded by a plasma membrane to keep their internal fluids separate from the cytoplasm of the rest of the cell (ex. lysosomes, golgi complex, and the mitochondria)50
8440873368Non Membrane-Bound OrganelleOrganelles that aren't fluid filled and have a more solid structure (ex. ribosomes, the cell wall, and the cytoskeleton)51
8440993182Cytosol vs CytoplasmCytosol: the part of the cytoplasm that is not held by any of the organelles in the cell Cytoplasm: the part of the cell which is contained within the entire cell membrane.52
8441044306What organelles and parts are only found in animal cells? Plant cells?Plant cells: cell wall, chloroplasts and other specialized plastids, and a large central vacuole Animal cells: Lysosomes53
8441084795What are the functions of all the organelles in animal and plant cells?1.) Cell wall: (plant, not animal) allows H2O, O2, CO2 to pass into and out of cell 2.) Cell membrane: (both plant/animal) controls movement of materials in/out of cell 3.) Nucleus: (both plant/animal) controls cell activities 4.) Nuclear membrane: (both plant/animal) surrounds nucleus 5.) Cytoplasm: (both plant/animal) clear, thick, jellylike material that supports and protects cell organelles 6.) Endoplasmic Reticulum: (both plant/animal) carries materials through cell 7.) Ribosome: (both plant/animal) produces proteins 8.) Mitochondrion: (both plant/animal) breaks down sugar molecules into energy 9.) Vacuole: (plant) fluid-filled sacs that store food, water, waste 10.) Lysosome: (Animal) breaks down larger food molecules into smaller molecules 11.) Chloroplast: (plant, not animal) uses energy from the sun to make food for the plant usually containing chlorophyll54
8448747741cancerA disease in which abnormal cells divide uncontrollably and destroy body tissue.55
8448766788AngiogenesisThe formation of new blood vessels.56
8448772877ChemotherapyThe use of medication to destroy cancer cells57
8448777988ThalidomideA sedative that used to be prescribed to treat anxiety, tension, gastritis and insomnia58
8448781185MetastasisThe spread of a tumor or cancer to distant parts of the body from its original site59
8451094291MitosisA process of nuclear division that occurs when a parent cell divides to produce two identical daughter cells60
8451112950Stages of Mitosis1.) Prophase 2.) Metaphase 3.) Anaphase 4.) Telophase61
8451127726Prophase(longest stage) The chromosomes become visible and the centrioles separate and move to opposite poles of the cell62
8451203964MetaphaseThe chromosomes line up across the center of the cell and become connected to the spindle fiber at their centromere63
8451208371Anaphase("Ana" meaning "back") The sister chromatids separate into individual chromosomes and are pulled apart64
8451253155TelophaseThe chromosomes gather at opposite ends of the cell and lose their distinct rod-like shapes. Two new nuclear membranes then form around each of the two regions of DNA and the spindle fibers disappear65
8451273411CytokinesisThe cell membrane will pinch and divide the cytoplasm in half. The result is two individual cells that are identical to the original cell66
8451279431MeiosisA specialized type of cell division that reduces the chromosome number by half, creating four haploid cells, each genetically distinct from the parent cell that gave rise to them67
8451327571Stages of Meiosis1.) Prophase I 2.) Metaphase I 3.) Anaphase I 4.) Telophase I 5.) Prophase II 6.) Metaphase II 7.) Anaphase II 8.) Telophase II68
8451355661Prophase IEach chromosome comes near its replicated chromosome pair and crossing over occurs69
8451359356Metaphase IThe pairs of homologous chromosomes line up in the center of the cell and the centromere of each chromatid pair attaches to one spindle fibre70
8451359357Anaphase IHomologous chromosomes are pulled to opposite ends of the cell71
8451364707Telophase IThe cytoplasm divides and two new cells form and each new cell has one duplicated chromosome from each similar pair72
8451368274Prophase IIThe duplicated chromosomes and spindle fibers reappear in each new cell73
8451372009Metaphase IIThe duplicated chromosomes move to the centre of the cell and each centromere attaches to two spindle fibres instead of one74
8451372010Anaphase IIThe chromatids seperate and move to opposite ends of the cell and each chromatid is now an individual chromosome75
8451375244Telophase IIThe spindle fibres disappear, and a nuclear membrane forms around each set of chromosomes76

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