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37 terms

BIO Lab Practical

STUDY
PLAY
acid
substance that increases the concentration of H+ ions
base
substance that decreases the concentration of H+ ions (increases OH- ions)
buffer
a substance that resists change in pH
monosaccharide
monomer of carbohydrates
nucleotide
monomer of nucleic acids
glycogen
storage carbohydrate found in animals
amino acid
monomer of proteins
phospholipid
glycerol + fatty acids + phosphate group
steroid
four ring lipid
benedict's test
tests for monosaccharides (changes blue to red)
iodine test for starch
tests for complex carbohydrates (organge to black)
biuret test
identifies materials with at least four peptide bonds (lavender shade)
sudan III solubility test
tests for lipids (mix = lipids b/c nonpolar)
dische diphenylamine test
test for deoxyribose (turns blue)
isotonic
equilibrium
hypertonic
higher concentration of solutes outside of cell
hypotonic
lower concentration of solutes outside of cell
brownian movement
random motion causes net movement of molecules from an area where they are in higher concentration to an area where they are in lower concentration
plasmolysis
cell shrinks due to hypertonic solution
nucleus
control center, contains genetic information
nucleolus
synthesis of rRNA and ribosomes
nuclear pore
small molecules diffuse
chromatin
regulate gene expression
rough ER
transports proteins synthesized by ribosomes
smooth ER
synthesizes lipids, carbs, and steroid hormones
ribosome
protein synthesis
golgi apparatus
packages protein for export from the cell
secretory vesicles
stores and transports materials
lysosome
digest worn-out organelles and cell debris; digest material taken up by endocytosis
glyoxysome
microbody with enzymes that convert fats into carbohydrates
peroxisome
microbody that contains enzymes that catalyze the removal of electrons and associated H atoms
mitochondria
power plants of the cell
chloroplast
photosynthesis site
cell wall
protection; support
central vacuole
stores proteins, pigments, and waste materials. Regulates water balance.
centriole
divides and organizes spindle fibers during mitosis and meiosis
cytoskeleton
structural support, cell movement, movement of vesicles within cell