Test 1 multiple choice

Question 1

element

Answer 1

-a substance that cannot be broken down by chemical reactions into other substances

Question 2

trace element

Answer 2

-required by organisms in minute quantity’s

Question 3

atom has 6 electrons, 6 neutrons, and 6 protons
what is its atomic mass in daltons

Answer 3

12 daltons

Question 4

a water molecule contains a ____ bond between the oxygen and hydrogens

Answer 4

-polar covalent

Question 5

where does the reactivity of an atom arise from?

Answer 5

-the existence of unpaired electrons in the valence shell

Question 6

_____ is defined as the amount of heat that must be absorbed or lost by 1 gram of substance to change its temp by 1C

Answer 6

specific heat

Question 7

PH

Answer 7

• below 7 is an acid
  -7 is neutral
  -above 7 is a base

Question 8

a solution of OH- concentration of 10-8M its ph is ?

Answer 8

6
-must add to 14

Question 9

we can be sure that a mole of table sugar and a mole of vitamin c are equal in there ___?

Answer 9

-number of molecules

Question 10

a substance that does not have an affinity for water is ____?

Answer 10

hydrophobic

Question 11

_______ chemistry is the study of carbon molecules

Answer 11

-organic

Question 12

which of the following hydrocarbons contains a double bond

Answer 12

C2H4

Question 13

when the functional group -OH is added on to a hydrocarbon the compound becomes a

Answer 13

alcohol

Question 14

carbon has ___ valence electrons, allowing it to form large, complex molecules

Answer 14

-4

Question 15

____ are compounds that have the same molecular formula but differ in their structures

Answer 15

-isomers

Question 16

a ____ is a long molecule consisting of many similar building blocks linked by covalent bonds

Answer 16

-polymer

Question 17

all lipids are _____

Answer 17

-hydrophobic

Question 18

the structural level of protein least affected by disruption in hydrogen bonding is the ______ level

Answer 18

-primary

Question 19

the monomeric unit of a protein is a ____

Answer 19

-amino acid

Question 20

which structure is common to plant and animal cells

Answer 20

-nucleus

Question 21

prokaryotic cells do not have a ________

Answer 21

-nucleus

Question 22

plant cells contain _______, which are the sites of photosynthesis

Answer 22

-chloroplasts

Question 23

plant cells can be larger than animal cells because they can contain a large _______, which does not increase the metabolic requirement of the cell

Answer 23

-central vacuole

Question 24

saturated fats are _______ at room temperature

Answer 24

-solid

Question 25

active transport requires energy and moves substances ___________ their concentration gradient.

Answer 25

-against