BIO 108L MIDTERM EXAM QUESTIONS WITH CORRECT ANSWERS LATEST UPDATE 2026
A good hypothesis:
I. It produces quantitative data.
II. It produces results that can be replicated.
III. It is testable.
IV. It is falsifiable. - Answers III and IV
Which sentence best describes the logic of scientific inquiry?
A) If I generate a testable hypothesis, tests and observations will support it.
B) If my hypothesis is correct, I can expect certain test results.
C) If my prediction is correct, it will lead to a testable hypothesis.
D) If my observations are accurate, they will support my hypothesis. - Answers B
A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment with 4
groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per acre, group C
gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following is the control
group?
A) group A
B) group B
C) group C
D) group D - Answers Group D
In the Monarch Butterfly experiment, what was the researchers hypothesis regarding the mother
butterflies? - Answers Infected female butterflies lay more eggs on plants that reduce parasite growth
What was the independent variable in the Monarch butterfly experiment where the feeding behavior
of the larvae was studied? - Answers infection between the butterfly
If you were to place a letter "F" (as seen) on the microscope stage, what would you observe under the
microscope? - Answers the F would be mirrored and upside down
As you increase magnification, the field of view... - Answers decreases
When you lower the stage of a microscope from the top position, the first color thread that appeared
in focus was red, then yellow, then blue. What color of thread was at the bottom of the slide? -
Answers Red
You want to examine an onion root tip but cannot find the specimen on the slide using the 10 X
objective lens. What should you do to find it ? - Answers Change to the 4X lens
Suppose you use an objective lens with a numerical aperature of 0.6 and where n=1. sin α =? -
Answers 0.6
What is diffusion? - Answers The movement of molecules from an area of high concentration to an
area of low concentration
What chemical did we test for when we used the Benedict's solution? - Answers glucose
What would happen to a piece of potato placed in pure water? - Answers increase of weight
What chemical reaction causes color change - from blue to yellow - in the Benedicts test? - Answers
reduction of copper ions
When is a plant cell turgid, flaccid, and plasmolyzed? - Answers hypotonic, isotonic, hypertonic
What is the substrate for amylase? - Answers starch
What were the two manipulated variables we tested last time? (for breaking down of starch) -
Answers temperature, pH
We observed a change in color in the wells over time, indicative of amylase activity, what variable is
this? - Answers dependent
Last time, a student realized that in the amylase test the first well (time 0) was not dark purple, as
expected.
What is not a reasonable explanation for this? - Answers the amylase is inactive
With your newfound knowledge of the powerful enzyme amylase, you want to extract some for
yourself. What animal would you expect to have high levels of amylase production, so you don't
waste your time? - Answers rabbit
What gas is fixed during photosynthesis? - Answers CO2
In paper chromatography, using a highly non-polar solvent, you want to separate 2 molecules.
Molecule "A" is less polar than molecule "B". Which of the two is expected to travel less in the paper?
- Answers B
A good hypothesis:
I. It produces quantitative data.
II. It produces results that can be replicated.
III. It is testable.
IV. It is falsifiable. - Answers III and IV
Which sentence best describes the logic of scientific inquiry?
A) If I generate a testable hypothesis, tests and observations will support it.
B) If my hypothesis is correct, I can expect certain test results.
C) If my prediction is correct, it will lead to a testable hypothesis.
D) If my observations are accurate, they will support my hypothesis. - Answers B
A scientist, who wants to study the effects of nitrogen on wheat plants, sets up an experiment with 4
groups of wheat plants: group A gets 20 pounds per acre, group B gets 40 pounds per acre, group C
gets 60 pounds per acre, and group D gets 0 pounds per acre. Which of the following is the control
group?
A) group A
B) group B
C) group C
D) group D - Answers Group D
In the Monarch Butterfly experiment, what was the researchers hypothesis regarding the mother
butterflies? - Answers Infected female butterflies lay more eggs on plants that reduce parasite growth
What was the independent variable in the Monarch butterfly experiment where the feeding behavior
of the larvae was studied? - Answers infection between the butterfly
If you were to place a letter "F" (as seen) on the microscope stage, what would you observe under the
microscope? - Answers the F would be mirrored and upside down
As you increase magnification, the field of view... - Answers decreases
When you lower the stage of a microscope from the top position, the first color thread that appeared
in focus was red, then yellow, then blue. What color of thread was at the bottom of the slide? -
Answers Red
You want to examine an onion root tip but cannot find the specimen on the slide using the 10 X
objective lens. What should you do to find it ? - Answers Change to the 4X lens
Suppose you use an objective lens with a numerical aperature of 0.6 and where n=1. sin α =? -
Answers 0.6
What is diffusion? - Answers The movement of molecules from an area of high concentration to an
area of low concentration
What chemical did we test for when we used the Benedict's solution? - Answers glucose
What would happen to a piece of potato placed in pure water? - Answers increase of weight
What chemical reaction causes color change - from blue to yellow - in the Benedicts test? - Answers
reduction of copper ions
When is a plant cell turgid, flaccid, and plasmolyzed? - Answers hypotonic, isotonic, hypertonic
What is the substrate for amylase? - Answers starch
What were the two manipulated variables we tested last time? (for breaking down of starch) -
Answers temperature, pH
We observed a change in color in the wells over time, indicative of amylase activity, what variable is
this? - Answers dependent
Last time, a student realized that in the amylase test the first well (time 0) was not dark purple, as
expected.
What is not a reasonable explanation for this? - Answers the amylase is inactive
With your newfound knowledge of the powerful enzyme amylase, you want to extract some for
yourself. What animal would you expect to have high levels of amylase production, so you don't
waste your time? - Answers rabbit
What gas is fixed during photosynthesis? - Answers CO2
In paper chromatography, using a highly non-polar solvent, you want to separate 2 molecules.
Molecule "A" is less polar than molecule "B". Which of the two is expected to travel less in the paper?
- Answers B
