BIO 101 Lab Exam 1 Study Guide Questions And Solutions |latest updates 2024|
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Course
BIO 101
Institution
BIO 101
BIO 101 Lab Exam 1 Study Guide Questions And
Solutions |latest updates 2024|
What is the function of proteins? (List three) - ANSWER Catalyze chemical reactions,
transmit signals, and provide structural support
What test indicates the presence of proteins within a substance? - AN...
BIO 101 Lab Exam 1 Study Guide Questions And
Solutions |latest updates 2024|
What is the function of proteins? (List three) - ANSWER Catalyze chemical reactions,
transmit signals, and provide structural support
What test indicates the presence of proteins within a substance? - ANSWER Biuret
test: Changes color
If you are testing to see if an unknown liquid contains protein and the substance turns
violet, does it have proteins? - ANSWER Yes, there is a presence of polypeptides
What do our bodies constantly crave, which our bodies are highly made up of? -
ANSWER Amino acids
What flavor does protein have? - ANSWER Umami or savory
What is the function of carbohydrates? - ANSWER Provide principal source of energy
What test(s) indicate the presence of sugar and or starch? - ANSWER Benedict's
reaction and Iodine (respectivly)
What does Benedict's reaction do? - ANSWER Turns colors indicating the amount of
sugars present?
If you are using benedict's reaction test to determine if an unknown solution has a small
or large amount of sugars, and the solution turns green does it have a small or large
amount? - ANSWER Small amount of sugars
If you are using benedict's reaction test to determine if an unknown solution has a small
or large amount of sugars, and the solution turns bright red does it have a small or large
amount? - ANSWER Large amount of sugars
If you are using benedict's reaction test to determine if an unknown solution has a small
or large amount of sugars, and the solution turns yellow-orange does it have a small or
large amount? - ANSWER Intermediate amount of sugars present in solution
Iodine indicates presence of ___________? - ANSWER Starch
What is the function of nucleic acids? - ANSWER Encode and transmit genetic
information (DNA and RNA)
What is the function of Lipids? - ANSWER Make up cell membrane and store energy
, What test indicates the presence of lipids? - ANSWER The Grease Spot Test
If an unknown solution left a translucent spot when dry does this substance contain
lipids or not? - ANSWER Contains lipids
Why are lipid substances hard to wash off? - ANSWER They contain hydrophobic
molecules
If you are testing if food has starch or not using the iodine test and the food turns from
a pale yellow to a blue-black shade in iodine presence, does this food have starch or
not? - ANSWER This food has starch
The _______________________ interior of the cell membrane prevents the simple
process of? - ANSWER Hydrophobic, diffusion
Define the process of Osmosis? - ANSWER The movement of H2O across a
membrane driven by a concentration gradient
Water always flows to the ___________________ concentration? - ANSWER
Hypertonic
If the cell has a high concentration of H2O and a low concentration of solute, the cell
is? - ANSWER Hypotonic
If the cell has a low concentration of H2O and a high concentration of solute, the cell
is? - ANSWER Hypertonic
When solutions have the same concentrations of H2O to solute; the solution is? -
ANSWER Isotonic
Cells lose water when placed in a __________ solution. - ANSWER Hypertonic
Describe plasmolysis - ANSWER The separation of the cell membrane away from the
cell wall as the volume decreases
When animal blood cells are placed in a hypertonic solution what happens to the shape
of the cell? - ANSWER The cell contracts and becomes crenated forming spikes or
scallops
If a cell uptakes more water than it can hold and explodes, what process is it going
through? - ANSWER Hemolysis
What organelle allows a plant cell to resist water pressure when placed in a hypotonic
solution? What is this pressure called? - ANSWER A rigid cell wall; turgor pressure
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