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biology exam

the basic unit of living things cells
characteristics of life 1. everything is made up of cells 2. environment 3. reproduce 4. utilize energy 5. development
what is metabolism ability to break down food and turn it into energy
homeostasis steady internal conditions so the organism can survive
dependent variable what you measure
independent variable variable you change
what is the scientific control used for its used for comparison
what are the steps of the scientific method observe, research, hypothesis, experiment, analyze, and conclude/retest
3 main differences between plant and animal cells cell wall, chloroplast, vacuole
what are the main differences between eukaryotic and prokaryotic eukaryotic have a nucleus, prokaryotic cells don't have one
who saw cork and called it cells Leeuwenhoek: invented single lens microscope to see cells
Who saw "animalcules" Hooke: the first person to identify cells using a 3 lens microscope
who discovered that all living things were cells schann
what are 3 main components of cell theory 1. organisms are made of cells 2. existing cells are made by other cells 3. the cell is the most basic unit of life
6 elements found in living things (CHNOPS) carbon, hydrogen, nitrogen, oxygen, phosphorous, sulfur
what element do all organic compounds contain carbon
what is the formula for glucose ( C___ H___ O___) C6 H12 O6
what type of reaction creates organic polymers hydrocarbons like ethylene and propylene
what is diffusion movement of a substance from a high to low concentration
what is osmosis when water molecules diffuse from high concentration to low , when molecules distribute themselves evenly
what is endocytosis, pinocytosis, and phagocytosis they all mean the same thing; the process of taking liquids or large molecules into a cell by engulfing it with the cell membrane
what is exocytosis when waste is let out of cell my breaking the cell membrane, the opposite of endocytosis
what is the difference between passive and active transport? passive transport does not require energy to happen, but active transport does require energy
what is an enzyme enzyme=catalyst, aka a liquid or substance to speed up a chemical reaction
are enzymes used up in chemical reactions (enzymes may be reused) enzymes are used to speed up chemical reactions
what does it mean for an enzyme to become denatured when the shape of the protein is altered so it can't be perform its function like usual
what is an enzyme and its substrate (the enzyme-substrate complex) the substrate is a molecule upon which an enzyme acts
what is the active site where the substrate binds to an enzyme
what is the substrate reactants that bind to enzyme at certain places of the active sites
what are the 3 subatomic particles of an atom and where are they located??? 1. proton- nucleus 2. neutron- nucleus 3. electron- found in rings around the nucleus
what is the charge of each of the following subatomic particles 1. protons- positive + 2. nuetron- neutral 3. electron- negative -
what is atomic mass and the atomic number of an element mean atomic mass= protons + neutrons atomic number= # of protons
whats the difference between 3 types of bonding 1. iconic- forms when atoms gain or lose an electron 2. covalent- when electrons are shared between atoms 3. hydrogen- when the positive and negative parts of an atom attract and connect each other
an example of a compound in which covalent bond occurs H2O
example of a compound in which ionic bonding occurs (you put it on french fries)
Created by: aama0764
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