Main results from experiments

Question 1

Lab 1: Which pipette method yielded the lowest volume?

Answer 1

The first stop of the pipette

Question 2

Lab 2: Which cell was bigger? Conjugating spirogyra or non-conjugating?

Answer 2

Conjugating

Question 3

Lab 3:
The 25% sucrose solution dialysis tubing sac was placed in the following solutions
Which solution was 0% sucrose and why?
Which solution was 15% sucrose and why?
Which solution was 25% sucrose and why?
Which solution was 35% sucrose and why?
Which solution was 50% sucrose and why?

Answer 3

Solution orange: the dialysis sac increased in weight when
it was placed in a hypotonic solution

Solution red: the
dialysis sac increased slightly when placed in a hypotonic solution.

Solution blue: the weight of the dialysis sac remained the same when placed in an isotonic solution

Solution yellow: the weight of the
dialysis sac decreased slightly when placed in a hypertonic solution

Solution green: the weight of the dialysis sac decreased when placed
in a hypertonic solution

Question 4

Lab 4: Name the order from smallest to biggest respiration rate of the sugars.

Answer 4

1. Lactose
2. Sucrose
   3.Lactose + Lactase
   4.Glucose

Question 5

Lab 4: Name the order from smallest to biggest photosynthesis rate of spinach (3 leaves per minute) of four solutions with
varying carbon dioxide concentrations and light conditions

Answer 5

1. 60 mM Carbon
   Dioxide + Dark
2. 0 mM Carbon
   Dioxide + Light
3. 60 mM Carbon
   Dioxide + Light
4. Unknown + Light

Question 6

Lab 6: How did the reagent impact the progression through the cell cycle?

Answer 6

It induced the progression

Question 7

Lab 6: What is the increasing order of proportions going through the cell cycle for the reagent?

Answer 7

1. Telophase
2. Prometaphase
3. Anaphase
4. Metaphase
5. Prophase

Question 8

Lab 6: What is the increasing order of proportions going through the cell cycle for the control?

Answer 8

1. Anaphase
2. Telophase
   3/4. Prometaphase/metaphase
3. Prophase

Question 9

Lab 3: Beet membrane
Which temperature had the
highest absorbance value? What does that indicate?

Answer 9

Hot

More energy is needed at a warmer temperature

Question 10

Lab 3: enzyme activity
How were the substrate concentration and time related?

Answer 10

Time limited the amount of substrates catalyzed despite the goal of substrate concentration provided

Question 11

Lab 3: enzyme activity 2
How do inhibitors influence enzymatic activity?

Answer 11

Inhibitors make it so that less substrates can form, so they reduce enzymatic activity

Question 12

Lab 4: Benedicts sugar test (testing for reducing sugars)
Which solutions (Water, Glucose, Sucrose, Fructose) produced a positive/negative result?

Answer 12

Positive:
Glucose
Fructose

Negative:
Water
Sucrose
(do not have an aldehyde group)

Question 13

Lab 7: Gel electrophoresis
Were any of the food samples genetically modified?

Answer 13

Yes they all were because they have the same band length as a known GMO product

Question 14

Lab 8: Gel electrophoresis
How many bands would each type have?

Answer 14

1 band: will have sickle cell
2 bands: unaffected
3 bands: sickle cell trait