Lab Practical

Question 1

Independent variable

Answer 1

variable that is the experimental condition

Question 2

dependent variable

Answer 2

variable that is being measured

Question 3

g —- > mg

Answer 3

1g = 1000mg

Question 4

mL —- microliter

Answer 4

1mL = 1000microliters

Question 5

fast plants (dom, recessive)

Answer 5

• dominant: Purple stem, green leaf
• recessive: Green stem, green-yellow leaves

Question 6

Anthocyanins

Answer 6

pigments that cause purple stem

Question 7

Expected dist of fast plants

Answer 7

9:3:3:1 (purple stem and green leaf to green stem and yellow-green leaves)

Question 8

What’s used to measure pH

Answer 8

red cabbage (anthocyancins)

Question 9

pH color scale

Answer 9

acidity: red
alkalinity: blue/green
neutral: purple

Question 10

white grape juice pH

Answer 10

1

Question 11

7up pH

Answer 11

4

Question 12

white wine pH

Answer 12

3

Question 13

seltzer water pH

Answer 13

6.5

Question 14

milk of magnesia (mg(oh)2)

Answer 14

10

Question 15

sodium bicarbonate

Answer 15

9

Question 16

maalox

Answer 16

7

Question 17

pine sol

Answer 17

2

Question 18

mouthwash

Answer 18

8

Question 19

shower cleanser

Answer 19

8

Question 20

pH of a buffer

Answer 20

6-8

Question 21

Benedict’s Test

Answer 21

test for monosaccrides (glucose)
- positive: orange
- negative: blue

Question 22

Juice for Benedict’s test?

Answer 22

onion juice has more reducing sugars than potato

Question 23

Iodine Test

Answer 23

tests for starch
- pos: purple
-neg: yellow

Question 24

Juice for iodine Test

Answer 24

Potato juice has more starch

Question 25

Biuret test

Answer 25

tests for peptide bonds
- pos: purple
-neg: yellow

Question 26

biuret test solubility in oil

Answer 26

-acetone dissolves
-water does not
experiment tested salad dressing

Question 27

blepharisma

Answer 27

look pic

Question 28

scenedesmus

Answer 28

look pic

Question 29

volvox

Answer 29

look pic

Question 30

Dialysis Sac

Answer 30

• iodine in beaker (yellow, dark)
• dialysis sac with iodine ( clear, dark)
• iodine diffused inside sac and glucose went out

Question 31

elodea

Answer 31

dehydrated with NaCl
- chloroplasts all over
- shrunk appearance

Question 32

Potato

Answer 32

• gained weight h2O
• lost weight dehydrated

Question 33

why do leaves turn dark

Answer 33

indication of starch

Question 34

chromatography does what

Answer 34

plant pigments

Question 35

chromatography

Answer 35

look pic

Question 36

plant pigments seperated based on…

Answer 36

polarity (paper=polar)

Question 37

idenitfy mitosis stages

Answer 37

look pic

Question 38

genotype

Answer 38

geneitc makeup

Question 39

phenotype

Answer 39

physically visible characterustuics

Question 40

taster

Answer 40

GG/CC
-has restrcition enzyme on site

Question 41

non-tatser

Answer 41

GGCC
- no restriction enzyme on site

Question 42

super taster

Answer 42

GG/CC
- restrcition ensyme on site

Question 43

LB

Answer 43

(-): all over gorwth
(+): all over growth
lysogeny broth nutritional broth

Question 44

LB/AMP

Answer 44

(-): no growth
(+): all over growth
amplicillin (antibiotic)

Question 45

LB/AMP/pARA-R

Answer 45

(-): no growth
(+): growth (pinK)
- has plasmid pARA-R added via CaCL
(arabinose operon. carbon and food source)