Gram Stain

Gram Stain

Professional Development

5 Qs

quiz-placeholder

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Gram Stain

Gram Stain

Assessment

Quiz

Biology

Professional Development

Practice Problem

Medium

Created by

Sara Broderick

Used 9+ times

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5 questions

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1.

MULTIPLE SELECT QUESTION

45 sec • 2 pts

Background info: A gram stain is one of the first diagnostic tests done when a swab from a patient arrives in the lab. It gives valuable information about the type of bacteria that is infecting the patient. The gram stain differentiates between bacteria with two different types of cell walls - gram-positive and gram-negative.

What is the purpose of a gram stain? (select all that apply)

To distinguish between gram-positive and gram-negative bacteria.

To make bacteria into an art project.

To turn bacteria into gram-positive and gram-negative organisms.

To help identify what type of infection a patient has.

2.

MATCH QUESTION

1 min • 5 pts

Media Image

Match the following reagents with their function:

Fixative

Ethanol

Decolorizer

Crystal Violet

Primary Dye

Safranin

Counterstain

Methanol

Mordant

Iodine

3.

LABELLING QUESTION

1 min • 2 pts

Label the following bacteria, based on their cell wall composition:​

a
b

Gram Positive

Gram Negative

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What would cause a gram-negative bacteria to appear purple?

Not using a decolorizer

A correctly performed gram-stain

Forgetting to use crystal violet

5.

DROPDOWN QUESTION

1 min • 3 pts

Media Image

A ​ (a)   bacteria has a thick layer of peptidoglycan in its cell wall. A ​ (b)   bacteria has a thin layer.

A gram-negative bacteria will also have a second ​ (c)   .

gram-positive
gram-negative
membrane
nucleus
infectious
wall

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