
Neutral Buffered Formalin Quiz
Interactive Video
•
Biology
•
10th - 12th Grade
•
Practice Problem
•
Hard
Jennifer Brown
FREE Resource
10 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary reason for adding a phosphate buffer to formalin?
To make it more volatile
To enhance its color
To stabilize its pH to neutral
To increase its acidity
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is neutral buffered formalin preferred over ordinary formalin for histological studies?
It is more readily available
It has a stronger odor
It prevents acid hematin formation
It is cheaper
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is a notable characteristic of specimens preserved in ordinary formalin for decades?
They disintegrate quickly
They lose color
They maintain structural integrity
They become toxic
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Under which condition is it acceptable to use ordinary unbuffered formalin?
When the specimen is for scientific research
When the specimen has a calcareous exoskeleton
When buffered formalin is unavailable
When the specimen is aquatic
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What type of skin makes a specimen more suitable for preservation in ordinary formalin?
Colorful skin
Transparent skin
Thick and resistant skin
Thin and fragile skin
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the first step in preparing 10% Neutral Buffered Formalin?
Pour water into a beaker
Weigh 4 grams of monobasic phosphate
Stir the solution
Measure 100 ml of formaldehyde
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of water is NOT recommended for preparing NBF?
Salt water
Tap water
Distilled water
Rain water
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