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

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'

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

Bio Lab Exam Practice Test

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