test 1 matching

Question 1

the atomic number always indicates the number of _____ an atom has

Answer 1

-protons

Question 2

______ have a negative charge

Answer 2

-electrons

Question 3

_______have lost an electron and have a positive charge

Answer 3

-cations

Question 4

_______have more neurons and therefore a greater mass than other atoms of the same element

Answer 4

-isotopes

Question 5

________ occurs when hydrogen bonds hold water molecules together

Answer 5

-cohesion

Question 6

________ represents the average kinetic energy of the molecules in a body of matter

Answer 6

-temprature

Question 7

a _____ increaces the hydrogen ion concentration of a solution

Answer 7

-acid

Question 8

a ________ reduces the hydrogen ion concentration of a substance

Answer 8

-base

Question 9

a _______ minimizes changes in the concentrations of H+ and OH- in a solution

Answer 9

-buffer

Question 10

“ene” in a chemical name indicates the precense of a ____ bond

Answer 10

-double

Question 11

________ are molecules that consist of only hydrogens and carbons

Answer 11

-hydrocarbons

Question 12

polymers are formed by the _______ reaction

Answer 12

-dehydration

Question 13

polymers are disassembled by the ______ reaction

Answer 13

-hydrolysis

Question 14

______ bonds hold together amino acids, forming proteins

Answer 14

peptide

Question 15

_______ are the monomeric units of nucleic acids

Answer 15

-nucleotides

Question 16

______ is a polysaccharide found in plant cell walls

Answer 16

-cellulose

Question 17

the _____contains most of the genes in eukaryotic cells

Answer 17

nucleus

Question 18

________ are the sites of protein synthesis

Answer 18

ribosomes

Question 19

the ________ is studded with ribosomes

Answer 19

rough ER

Question 20

the _____ is the site of lipid synthesis, detoxification of drugs and toxins, and storage of calcium ions

Answer 20

-smooth ER

Question 21

the _________ is where products of the ER are modified and stored prior to secretion

Answer 21

Golgi apparatus

Question 22

a _______ is a membranous sac of hydrolytic enzymes

Answer 22

-lysosomes

Question 23

the ______ is the site of cellular respiration

Answer 23

mitochondria

Question 24

Flagella and ceilia are composed of _______

Answer 24

microtubules

Question 25

______ diffusion is when the hydrophilic substance crosses the plasma membrane with the aid of integral membrane proteins

Answer 25

facilitated