Chemical Basis Of Life

Question 1

the discipline that deals woth the chemistry of living things

Answer 1

biochemistry

Question 2

Four states of matter are:

Answer 2

solid, liquid, gas, plasma

Question 3

has a definite shape and volume

Answer 3

solid

Question 4

has definite volume-takes up shape of container

Answer 4

liquid

Question 5

has no definite volume or shape

Answer 5

gas

Question 6

found only on the sun

Answer 6

plasma

Question 7

The four elements most plentiful in the body are:

Answer 7

carbon, hydrogen, oxygen, nitrogen

Question 8

_____ elements combined make us less than 0.1% of the body

Answer 8

trace

Question 9

positive charge

Answer 9

protons

Question 10

no charge

Answer 10

neutrons

Question 11

negative charge

Answer 11

electrons

Question 12

The ___ is the number of protons in the nucleus

Answer 12

atomic #

Question 13

An atom that had become electrically charged by gaining or losing an electron is called an ___

Answer 13

ion

Question 14

deuterium and tritium are examples of ___

Answer 14

isotopes

Question 15

A ___ is where two or more different kinda of atoms are united

Answer 15

compound

Question 16

A ___ is where two or more atoms are combined

Answer 16

molecule

Question 17

An acid has a PH ___ than 7

Answer 17

less

Question 18

A base has a PH ___ than 7

Answer 18

greater

Question 19

A base has a PH ___ than 7

Answer 19

greater

Question 20

A substance with a PH of 7 is ___

Answer 20

neutral

Question 21

A + B -> AB

Answer 21

synthesis

Question 22

AB -> A + B

Answer 22

decomposition

Question 23

AB + CD -> AD + CB

Answer 23

exchange/double replacement

Question 24

A + B AB

Answer 24

reversable

Question 25

Molecules lacking carbon are called ___

Answer 25

inorganic

Question 26

Molecules containing both H and C are ___

Answer 26

organic

Question 27

Insoluble in water

Answer 27

Lipids

Question 28

Proteins which act as catalysts in living systems

Answer 28

enzymes

Question 29

___ are the building blocks of proteins

Answer 29

amino acids

Question 30

There are ___ different amino acids in the body

Answer 30

twenty

Question 31

___ are the building blocks of nucleic acids

Answer 31

nucleotides

Question 32

___ forms molecular code while ___ synthesizes proteins

Answer 32

DNA - RNA

Question 33

___ is the # of protons and neutrons

Answer 33

atomic weight

Question 34

Central portion of the atom is the ___

Answer 34

nucleus

Question 35

2 or more different types of atoms

Answer 35

compound

Question 36

2 or more atoms

Answer 36

molecule

Question 37

made up of one type of atom

Answer 37

elements

Question 38

2 or more atoms share electrons

Answer 38

covalent bonds

Question 39

Acid PH

Answer 39

0-7

Question 40

Base PH

Answer 40

7-14

Question 41

___ of water enter and leave the body

Answer 41

2700 milliters

Question 42

egg white hardens when exposed to heat

Answer 42

denatured