Biology EOC Flashcards
Test tube
Narrow glass cylinder with an opening
Graduated cylinder
Used to measure a precise volume of a liquid
Petri dish
Dish used for growing bacteria on a solid growth medium that contains nutrients
Balance
Used to measure mass
Stopwatch
Used to measure time
Microscope
Device that lets users view an enlarged image of small objects
Hand lens
A magnifier held in the hand
Compound microscope
Uses two or more lenses to form an enlarged and focused image of an object
Microscope slide
Piece of glass that is used to hold a specimen under a compound microscope
Electron microscope
Creates images using streams of electrons
Qualitative data
Information described in words
Quantitative data
Information described in numbers
Data table
Display that shows related data in rows and columns
Circle graph
Shows each quantity as part of a whole
Bar graph
Compares data using bars of different heights or lengths
Line graph
Uses plotted points to show relationships between variables
Extrapolation
Prediction of values beyond the points plotted on a graphed line
Interpolation
Prediction of values between points plotted on a graphed line
Inference
Interpretation that is based on prior experience
Cell
Basic unit of structure in all living things
Homeostasis
A balanced internal environment
Organelles
Cell structures
Eukaryotes
Cell that has a distinct nucleus and other cell structures
Prokaryotes
Organisms whose cells lack a distinct nucleus and membrane-bound organelles
Cytoplasm
Fluid that occupies most of the space within a cell
Nucleus
Large organelle that controls cell activities
Chromosomes
Structures in which eukaryotic DNA is organized into
Cell membrane
A thin, flexible layer that surrounds the cytoplasm
Ribosomes
Structures which produce proteins
Endoplasmic reticulum
System of tubes and sacs that transport molecules from one part of the cell to the other
Golgi body
System of membranes that modifies and refines proteins and lipids
Mitochondria
Site of cellular respiration
Lysosome
Small, spherical organelles that carry out digestion in the cell
Cell wall
A rigid structure that surrounds the cell membrane of some cells
Chloroplasts
Organelles that capture the energy of sunlight for photosynthesis
Photosynesis
Process in which some organisms use sunlight to makr food from water and carbon dioxide
Vacuole
Stores water and other dissolved materials(plants have a large central one)
Diffusion
Movement of particles from an area of higher concentration to an area of lower concentration
Passive transport
Movement of materials into or out of the cell without using energy
Equilibrium
When particles reach the state of equal concentration
Selectively permeable
Cell membranes that only allow some particles to pass through them
Osmosis
Movement of water molecules from a concentrated solution to a less concentrated solution
Concentration gradient
Difference in concentration on opposite sides of the cell memebrane
Hypertonic solution
When the concentration of solute outside the cell is higher than the concentration inside the cytoplasm
Hypotonic solution
When the concentration of solute in the cytoplasm is higher than outside of the cell
Facilitated diffusion
Movement of substances across a cell membrane with the aid of protein molecules
Active transport
Moving material against the concentration gradient, which requires energy
Sodium-potassium pump
When sodium ions are pumped out of the cell and potassium ions are pumped into the cell, with the help of carrier proteins
Endocytosis
Process in which a cell surrounds and takes in material from its environment
Exocytosis
When cells try to remove unwanted materials
Macromolecules
A very large molecule that forms when smaller compounds are joined together by chemical bonds
Carbohydrates
Organic molecules composed of carbon,hydrogen,and oxygen
What is the primary energy source of most organisms?
Carbohydrates
What is the simplest type of a carbohydrate?
A simple sugar
What does the word “saccharide” mean?
Sugar
Two monosaccharides that bond together
A disaccharide
Proteins
Large organic molecules composed of carbon, hydrogen, oxygen, and nitrogen
What are the uilding blocks of proteins called?
Amino acid
Enzyme
An organic catalyst that controls the rate of chemical reactions in the body
Lipids
Organic molecules composed of hydrogen, carbon, and oxygen
What are the differences between lipids and carbohydrates?
Lipids have more carbon-hydrogen bonds and fewer oxygen atoms than carbohydrates, and lipids do not dissolve in water
What form are lipids in plants?
Oils
How are waxes made?
Long-chain fatty acids attached to an alcohol
How do many lipids form?
Combination of a glycerol molecule and fatty acids
What do fatty acids consist of?
Carbon, hydrogen, and oxygen
How is a lipid described as saturated?
If each carbon atom in the fatty acid chain is joined to another carbon atom by a single bond
How is a lipid described as unsaturated?
If it contains at least one double bond between carbon atoms
What is a nucleic acid?
Large,complex molecules made of smaller molecules containing carbon, hydrogen, oxygen, nitrogen, and phosphorus
What is a nucleotide made up of?
A molecule of sugar that contains five carbon atoms, a nitrogen-containing base, and a phosphate group
What is the job of nucleic acids?
To store and transmit information in the form of a code
What are the two most important nucleic acis?
DNA and RNA
What are the roles of DNA and RNA in the formation of a code?
Genetic information is stored in DNA, translated by RNA and then used to direct the production of proteins
What are energy sources for cells?
Carohydrates, proteins,and lipids
How many calories per gram are in carbohydrates and proteins?
4
Why are carbohydrates a better source of energy than proteins and lipids?
Proteins take a long time to break down, and cells store energy in lipids
What is a reactant?
Atoms, molecules, or compounds that enter into a chemical reaction
What is a product of a chemical reaction?
Atoms, molecules, or compounds that result from the reaction
What are the reactants of photosynthesis?
Carbon dioxide and water
What are the products of photosynthesis?
Glucose and oxygen
What are the reactants of cellular respiration?
Glucose and oxygen
What are the products of cellular respiration?
Carbon dioxide, water, and energy(ATP)
What is a catalyst?
A substance that speeds up the rate of a chemical reaction without itself being changed from the reaction?
What is an enzyme?
A protein that is a biochemical catalyst
What are substrates?
The reactants that are affected by enzymes in enzyme-catalyzed reactions
Where do substrates bind to on an enzyme?
The active site
How are the shapes of a substrate and a active site related?
They are opposite so they can fit together like lock and key