What Is the Most Likely Reason for Cells on a Hemocytometer

question 9

Multiple Choice

What is the most likely reason for cells on a hemocytometer appearing "fuzzy" when switching from low power to the *40 objective?

• A)condenser not lowered enough
• B)hemocytometer not cleaned properly
• C)oil on the 40 x lens
• D)cells not allowed to settle

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Definitions:

Introns

Non-coding sections of an RNA transcript, or the DNA encoding it, that are spliced out before the RNA molecule is translated into a protein.

Pre-mRNA

RNA precursor to mRNA in eukaryotes; contains both introns and exons.

Exon Combinations

Variations in the assembly of exons during mRNA processing, resulting in different mRNA molecules from the same DNA sequence.

DNA Strand

One of the two long chains of nucleotides that form the double helix structure of DNA, carrying genetic information.