Biological Techniques & Skills

Front

What is the purpose of embedding tissue samples in paraffin wax during histological processing?

Back

To preserve the tissue structure

Front

What role does a microtome play in the preparation of histological slides?

Back

To cut tissue sections into thin slices

Front

What is the significance of clearing tissue samples during histological preparation?

Back

To make the tissue transparent for embedding

Front

What is the significance of the iodine step in the Gram staining process?

Back

To enhance the crystal violet stain

Front

How can you differentiate between Gram-positive and Gram-negative bacteria based on their color after staining?

Back

Gram-positive bacteria appear purple; Gram-negative bacteria appear red

Front

What is the most common reason a Gram-positive bacterium appears as Gram-negative after staining?

Back

Over-decolorization during the Gram staining process

Front

What is the purpose of using xylene in histological processing?

Back

To clear the tissue and remove embedding medium

Front

Sampling techniques are scientific methods of selecting representative samples from a population.

Back

TRUE

Front

Systematic sampling is used when the population is homogeneous and the sampling frame is available.

Back

TRUE

Front

Simple random sampling is based on the probability concept.

Back

TRUE