test 1 matching Flashcards
the atomic number always indicates the number of _____ an atom has
-protons
______ have a negative charge
-electrons
_______have lost an electron and have a positive charge
-cations
_______have more neurons and therefore a greater mass than other atoms of the same element
-isotopes
________ occurs when hydrogen bonds hold water molecules together
-cohesion
________ represents the average kinetic energy of the molecules in a body of matter
-temprature
a _____ increaces the hydrogen ion concentration of a solution
-acid
a ________ reduces the hydrogen ion concentration of a substance
-base
a _______ minimizes changes in the concentrations of H+ and OH- in a solution
-buffer
“ene” in a chemical name indicates the precense of a ____ bond
-double
________ are molecules that consist of only hydrogens and carbons
-hydrocarbons
polymers are formed by the _______ reaction
-dehydration
polymers are disassembled by the ______ reaction
-hydrolysis
______ bonds hold together amino acids, forming proteins
peptide
_______ are the monomeric units of nucleic acids
-nucleotides
______ is a polysaccharide found in plant cell walls
-cellulose
the _____contains most of the genes in eukaryotic cells
nucleus
________ are the sites of protein synthesis
ribosomes
the ________ is studded with ribosomes
rough ER
the _____ is the site of lipid synthesis, detoxification of drugs and toxins, and storage of calcium ions
-smooth ER
the _________ is where products of the ER are modified and stored prior to secretion
Golgi apparatus
a _______ is a membranous sac of hydrolytic enzymes
-lysosomes
the ______ is the site of cellular respiration
mitochondria
Flagella and ceilia are composed of _______
microtubules
______ diffusion is when the hydrophilic substance crosses the plasma membrane with the aid of integral membrane proteins
facilitated
