bio unit 1 test

Question 1

mean

Answer 1

the average of the data set (add all data points together and divide by number of data points)

Question 2

standard deviation

Answer 2

Find the mean (average).
Subtract the mean from each value (find deviations).
Square each deviation.
Find the average of these squared deviations by looking at the mean
Take the square root

Question 3

SEM

Answer 3

standard deviation over the square root of N. add and subtract sem from mean to get error bars

Question 4

density of pure water

Answer 4

1g/ml

Question 5

overlap of error bars means

Answer 5

no significant difference

Question 6

percent change

Answer 6

(final-initial)/initial x 100

Question 7

C -> F

Answer 7

(9/5 x C) + 32

Question 8

F -> C

Answer 8

5/9 x (F - 32)

Question 9

1 cm^3 =

Answer 9

1 mL

Question 10

1 lb =

Answer 10

0.45 kg

Question 11

1 kg =

Answer 11

2.2 lb

Question 12

1 cm =

Answer 12

0.39 in

Question 13

1 in =

Answer 13

2.54 cm

Question 14

scientific method

Answer 14

observations -> question -> hypothesis -> experiment -> data -> conclusion -> communicate

Question 15

independent variable

Answer 15

the thing you change in an experiment

Question 16

dependent variable

Answer 16

the thing you measure in an experiment

Question 17

control variable

Answer 17

the things you keep the same so the test is fair

Question 18

theory

Answer 18

a well-tested explanation of why something happens

Question 19

law

Answer 19

a statement that describes what happens under certain conditions

Question 20

hypothesis

Answer 20

a testable prediction or educated guess

Question 21

bond between glucose molecules

Answer 21

glycosidic linkage

Question 22

glucose + fructose

Answer 22

sucrose

Question 23

glucose + glucose

Answer 23

maltose

Question 24

glucose + galactose

Answer 24

lactose

Question 25

type of reaction to join monomers to make macromolecules

Answer 25

dehydration synthesis

Question 26

water is what kind of molecule

Answer 26

polar

Question 27

saturated

Answer 27

no double bonds, straight chain, solid at room temperature, pack tightly, higher melting point, more viscous

Question 28

unsaturated

Answer 28

double bonds, bent chain, liquid at room temperature, lower melting point

Question 29

reactions occur when bonds

Answer 29

break/form which requires collision + correct orientation + energy

Question 30

cohesion

Answer 30

surface tension, water transport in plants

Question 31

adhesion

Answer 31

capillary action

Question 32

high specific heat

Answer 32

needs more heat to transition from one state of matter to another

Question 33

solvent properties

Answer 33

dissolve ions

Question 34

van der Waals attrations

Answer 34

weak intermolecular forces between nonpolar chains

Question 35

chains are stronger if

Answer 35

they are longer/straighter

Question 36

cis fatty acid

Answer 36

double bond with a bend (less density)

Question 37

trans fatty acid

Answer 37

strighter, behave more like saturated acids

Question 38

covalent bond

Answer 38

two atoms share their electrons

Question 39

when is it easier to break bonds of molecules

Answer 39

when the temperature goes up

Question 40

what bonds are the hardest to break

Answer 40

covalent bonds

Question 41

at what temperature is water its densest

Answer 41

4 degrees c

Question 42

what happens when water freezes

Answer 42

it expands, the hydrogen bonds lock in place to become solid causing molecules to take up more space reducing its density

Question 43

what happens when two molecules undergo a chemical reaction

Answer 43

they break and reform with new partners

Question 44

primary structure

Answer 44

sequence of amino acids (peptide bonds)

Question 45

secondary structure

Answer 45

stabilized by hydrogen bonds

Question 46

tertiary structure

Answer 46

full 3-d folding, held by many different types of bonds

Question 47

quaternary structure

Answer 47

several polypeptide chains together

Question 48

denaturing

Answer 48

loss of 3-d shape, due to heat, ph, or chemicals (sequence stays intact but function is lost)

Question 49

enzymes

Answer 49

proteins that speed up reactions by lowering activation energy

Question 50

antibodies

Answer 50

recognize and bind to specific antigens to mark them for destruction

Question 51

hemoglobin

Answer 51

binds and carries oxygen to and from the lungs

Question 52

what proteins do

Answer 52

movement, structures, chemical messengers