AUBURN BIOLOGY 1021 LAB FINAL
EXAM QUESTIONS AND ANSWERS
(VERIFIED AND UPDATED)
Lab 1: What did caffeine do to the heart rate of Daphnia? - ANS Caffeine sped up the heart
rate
Lab 1: What did ethanol do to the heart rate of the Daphnia? - ANS Ethanol slowed it down
Lab 1: Anatomy of daphnia - ANS
Lab 1: Know major parts of dissecting scope - ANS Look in lab manual (1-4)
Lab 1: One or more factors that the scientist varies during the experiment - ANS Independent
variable
Lab 1: A feature that the scientist measures in order to determine if it changes in response to
the independent variable - ANS Dependent variable
range
median
mean
mode - ANS difference between highest and lowest value
@2026/2027 ALLRIGHTS RESERVED.
, number in the middle
average
number that occurs the most
Lab 2: What solutions are used to test for the 4 types of organic molecules? - ANS Iodine --
polysaccharide (starch)
Benedict's Reagent -- Sugar
Brown Paper Bag and Vegetable Oil--Lipids
Biuret Test - protein
Lab 2: What does a positive test look like for the vegetable oil test for lipids? Negative? -
ANS Positive vegetable oil test: 1 layer
Negative vegetable oil test: 2 layers
Lab 2: What does a positive test look like for the Biuret test for proteins? negative? -
ANS Positive Biuret Test: violet color
Negative Biuret Test: pinkish
Lab 2: What does a positive test look like for the Benedict's Reagent for sugar? -
ANS NEGATIVE: BLUE any other color is positive
green: very low
yellow: low
yellow/orange: medium
orange: high
red/orange: very high
@2026/2027 ALLRIGHTS RESERVED.
EXAM QUESTIONS AND ANSWERS
(VERIFIED AND UPDATED)
Lab 1: What did caffeine do to the heart rate of Daphnia? - ANS Caffeine sped up the heart
rate
Lab 1: What did ethanol do to the heart rate of the Daphnia? - ANS Ethanol slowed it down
Lab 1: Anatomy of daphnia - ANS
Lab 1: Know major parts of dissecting scope - ANS Look in lab manual (1-4)
Lab 1: One or more factors that the scientist varies during the experiment - ANS Independent
variable
Lab 1: A feature that the scientist measures in order to determine if it changes in response to
the independent variable - ANS Dependent variable
range
median
mean
mode - ANS difference between highest and lowest value
@2026/2027 ALLRIGHTS RESERVED.
, number in the middle
average
number that occurs the most
Lab 2: What solutions are used to test for the 4 types of organic molecules? - ANS Iodine --
polysaccharide (starch)
Benedict's Reagent -- Sugar
Brown Paper Bag and Vegetable Oil--Lipids
Biuret Test - protein
Lab 2: What does a positive test look like for the vegetable oil test for lipids? Negative? -
ANS Positive vegetable oil test: 1 layer
Negative vegetable oil test: 2 layers
Lab 2: What does a positive test look like for the Biuret test for proteins? negative? -
ANS Positive Biuret Test: violet color
Negative Biuret Test: pinkish
Lab 2: What does a positive test look like for the Benedict's Reagent for sugar? -
ANS NEGATIVE: BLUE any other color is positive
green: very low
yellow: low
yellow/orange: medium
orange: high
red/orange: very high
@2026/2027 ALLRIGHTS RESERVED.
