Bio Lab Exam Practice Test
What does Sudan IV measure?
Proteins
Fats and Oils
Starch
Lipids
A positive reaction for Sudan IV is a red ring at the top.
True
False
What is the process used to measure the dependent variable?
Procedure
Levels of treatment
Experiment
Independent variable
What is magnification?
How closely you can see a specimen
How well can you tell things apart
Clarity/how easy it is to distinguish one thing from another.
What is resolution?
How closely you can see a specimen
How well can you tell things apart
Clarity/how easy it is to distinguish one thing from another.
Which of the following has a four-ring carbon structure?
Sucrose
Glucose
Fructose
Match the producers with one another:
Algae
Single cellular
Diatoms
Multi unicelled algae together
Non-Filamentous Algae
Golden brown
Filamentous Algae
Stringy
What does the iodine solution test for?
Starch
Fats and Oils
Glucose
Proteins
A positive reaction for iodine will make a dark color:
True
False
What does the biuret solution test for?
Starch
Glucose
Proteins
Fats and oils
What color does a positive biuret solution turn?
Clear
Purple
Orange
Green
What does the benedict solution test for?
Glucose
Proteins
Fats and Oils
Starch
What color is a positive benedict reaction?
Green
Orange
Blue
Black
What are a pseudopodia?
Pseudopodia are temporary extensions of the cell membrane that act like arms or legs for some single-celled organisms
A protective layer that surrounds some types of cells, such as plants, fungi, and bacteria.
How do enzyme (inhibitors) react in competitive and noncompetitive inhibition? (select all that apply)
In noncompetitive inhibition the inhibitor is not structurally similar to the substrate and does no compete for position in the active site. It may physically block access to the active site or it may bind to a part of the enzyme thats not the active site, causing the conformation of the protein to change. (rendering it inactive)
In competitive inhibition, it will mimic the substrate and compete for the position at the active site on the enzyme.
Competitive inhibition takes place when a molecule that is structurally similar to the substrate for a particular reaction compete for a position at the active site on an enzyme.
How should hypothesis be set up?
'I believe'
'I know'
'If/then'
'sei/zure'
Match the colors to their designated element: (Think ball models)
Oxygen
Red
Carbon
White
Nitrogen
Black
Hydrogen
Blue
Which bonds are weaker? (think ball models)
Short
Long
Match with the following
Hypertonic solution
An isotonic solution is one that has the same osmolarity, or solute concentration, as another solution. If these two solutions are separated by a semipermeable membrane, water will flow in equal parts out of each solution and into the other.
Isotonic solution
There will be a net flow of water out of the cell, and the cell will lose volume.
Hypotonic solution
Water will leave the cell, and the cell will shrink.
What happened to the 40% sucrose egg?
It gained mass (hypotonic)
It lost mass (hypertonic
It stayed the same (isotonic)
It popped
What is this?
Filamentous Algae
Non-filamentous algae
Algae
Diatoms
What is this?
Filamentous algae
Non-filamentous algae
Algae
Diatom
What are these?
Filamentous
Non-filamentous
Algae
Diatom
What is a substrate? (enzyme substrate complex)
A molecule acted upon by an enzyme
An enzyme that acts upon a molecule at the active site
Which is a catalyst?
Enzyme
Carbohydrate
Lipid
DNA+RNA
What's a simple colony?
The structural composition of cells permanently united
Cells that temporarily stick together for safety
What's an aggregate?
The structural composition of cells permanently united
Cells that temporarily stick together for safety
Which solution yields these results?
Biuret
Iodine
Benedicts
Sudan IV
Which solution yields these results? (Left is negative: can be blue or clear, right is positve)
Biuret
Iodine
Benedicts
Sudan IV
Which solution yields these results?
Biuret
Iodine
Benedicts
Sudan IV
Which solution yields these results?
Biuret
Iodine
Benedict
Sudan IV
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