Midterm Review Flashcards
what are the levels of the biological hierarchy?
molecule, organelle, cell, tissue, organ, organ system, organism, population, community, ecosystem, biosphere
where does life emerge
cell level
energy flow through the ecosystem
sunlight to producers to chemical energy to consumers
plants tht provide the food for a typical ecosystem
producers
eat plants and other animals
consmers
contain prokaryotes and bacteria
domain bacteria
contain prokaryotes and archaea
domain archaea
contain protists, plants, fungi, and animals
domain eukarya
process in which organisms with certain inherited characteristics are more likely to survive and reproduce than are organisms with other characteristics
natural selection
experiment where 2 tests are run, then compared
controlled experiment
testable and falsifiable
valid hypothesis
most common elements in living things
carbon
hydrogen
oxygen
nitrogen
atomic number
number of protons
atomic mass
number of protons plus number of neutrons
positive, nucleus
protons
negative, electron cloud
electrons
neutral, nucleus
neutrons
transfers electrons
ionic bond
molecules with more or less electrons than initally
ion
sharing of electrons, can double bond, strongest
covalent bond
polar molecules are bonded together, weakest
hydrogen
compound that donates H ions to a solution ex. lemon juice
acid
compound that accepts H ions and removes them from solution and donates OH- ex. bleach
base
pH scale
0-14
acids
0-7
bases
7-14
neutral on pH scale
7
substance that minimizes change in pH ex. in blood
buffer
why is water polar
unequal sharing of electrons
carbon based molecule
organic compound
molecular formula is the same as carbon skeeton, but there is a different structure (form fits function)
isomer
monomer of polysaccharides
sugars
monomer of lipids
fatty acids
monomer of proteins
amino acids
monomer of nucleic acids
nucleotides
fuction of polysaccharides
storage and structure
function of lipids
energy storage, make up cell membranes, precursors to cholesterol
function of proteins
structure, contractile, defensive, signal, receptor, transport, storage
function of nucleic acids
contain genes in DNA and RNA
hydroxyl, carbonyl, carboxyl, amino
functional groups
OH, alcohols
hydroxyl
C=O, aldehyde(end) and ketone(within)
carbonyl
C=O and hydroxyl, is acid, ex. acetic acid
carboxyl
NH2, base
amino
removes a molecule of water in order to join 2 monomers into a polymer
dehydration synthesis
adds a molecule of water in order to destroy/separate polymers
hydrolysis
storage in animals, branched, made of glucose
glycogen
storage in plants, made of glucose, helix
starch
structure in cell walls, joined by hydrogen bonds
cellulose
structure in exskeleton of insects and crustaceans
chitin
solids, animal based, no double bonds
saturated fats
oils/liquids, plant based, double bonds
unsaturated fats
types of lipids
fats, phospholipids, steroids
used to connect amino acids to form peptide bonds
dehydration synthesis
clarity of an image and ability to see 2 close objects as separate
resolution
increase inapparent size of an obect
magnification
organelles only in prokaryotes
nucleiod, capsule, pili, falgella
organelles only in plants
cell wall
central vacuole
chloroplast
plasmodesmata
provides and maintains shape of cells and serves as a protective barrier
cell wall
stores nutrients and waste products and water
central vacuole
contains chlorophyl, which absorbs sunlight to carry out photosynthesis
chloroplast
channel between cell walls that link plant cells together
plasmodesmata
contains dna and holds all info
nucleus
framework, cell-cell recognition, enzyme, receptor, transport
membrane
makes proteins
ribosomes
breaks down nutrients
lysosome
recieves and modifies products from ER
Golgi apparatus
make lipis and membrane
rough/smooth ER
transports materials throughout cells
transport vesicle
holds cells together intissues and protects and supports the plasma membrane
extracellular matrix
prevents leakage
tight junction
communicate and coordinates
gap junction
particles spread out evenly in an available space
diffusion
diffusion of water across a membrane
osmosis
transport protein makes it possible to diffuse
facilitated diffusion
moves down concentration gradient, doesn’t require energy
passive transport
moves up concentration gradient, requires energy
active transport
engulfment of particles, cellular eating
phagocytosis
fluids are engulfed, cellular drinking
pinocytosis
exports bulky materials
exocytosis
releases energy
exergonic reaction
requires energy
endergonic reaction
_____ speed up reaction s by using less _____
enzymes, activation energy
STUDY DIAGRAM
now please