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40 Cards in this Set

  • Front
  • Back
the study of life
the maintenance of a stable level of internal conditions even though environmental conditions are constantly changing
branch of biology that studies organisms interacting with each other and the environment
in science, an idea or explanation that is based on observation and that can be tested
the attractive force between oppositely charged ions
ionic bond
a bond formed when atoms share one or more pairs of electrons
covalent bond
a type of protein or RNA molecule that speeds up metabolic reactions in plants and animals without permanently being changed or destoryed
a solution made from a weak acid and its conjugate base that neutralizes small amounds of acids or bases added to it
a chemical reaction in which a reactant loses one or more electrons such that the reactant becomes more positive in charge
a chemical change in which electrons are gained
the uneven distribution of charge
the smallestunit of life that can carry out all of life's processes
an organism that obtains organic food molecules by eating other organisms
an organicsm that produces its own nutrients from inorganic stubstances or from the environment
what is the purpose of DNA?
it contains information that determines the characteristics of an organism, and directs cell activities
what are the characteristics of life?
organization and cell, response to stimuli, homeostasis, metabolism, growth and developement, reproduction, and evolution
what are the steps of the scientific method?
observation, hypothesis, prediction, experiment, conclusion, publish
what are the components of an atom?
protons, electrons, and neutrons
what happens when an atom gains energy?
its electrons become excited and move to the next shell
what happens when an atom gains electrons?
it becomes negative
what happens when an atom loses electrons?
it becomes positive
what does pH measure?
the concentrations of hydronium and hydroxide ions in a solution
what are the 4 classes of molecules?
carbohydrates, proteins, lipids, and nucleic acids
what are the building blocks of carbohydrates?
monosaccharides, disaccharides, and polysaccharides
what are the building blocks of proteins?
amino acids, dipeptides, polypeptides, and enzymes
what are the building blocks of lipids?
fatty acids, triglycerides, phospholipids, waxes, and steroids
what are the building blocks of nucleic acids?
DNA, RNA, and nucleotides
what is the difference between diffusion and facilitated diffusion?
diffusion needs energy to transfer molecules and facilited diffusion doesn't
what would happen to cell if it is put in an isotonic solution?
water would come in and out of the cell evenly
what would happen to cell if it is put in a hypotonic solution?
water would enter the cell and the cell would expand
what would happen to a cell if it is put in a hypertonic solution?
water would leave the cell and the cell would shrink
what do pigments do?
they absorb light and reflect the light that they don't absorb
what is the C4 pathway?
the stomata closes during the hottest part of the day to minimize water loss
what affects the rate of photosynthesis?
light intensity, carbon dioxide levels, and temperature
where do light reactions take place?
thylakoid membrane
where does the calvin cycle take place?
stroma of the chloroplasts
where is the electron transport chain?
thylakoid membrane
where does glycolysis take place?
the cytosol of the cytoplasm
where does the kreb cyle take place?
where does chemiosmosis take place?