MI 3.1-3.1.4

What does BLACK indicate in dna microarray?

• gene expression in cancer cells

• gene expression in healthy and cancer cells

• no gene expression

• gene expression in healthy cells

When comparing healthy and cancerous lung cells on a microarray, what color would you expect the dot that represents the gene for producing melanin (pigment for skin color)?

• Red

• Yellow

• Green

• Black

Which genes are expressed in both normal and in cancerous cells?

• Genes marked by red spots only

• Genes marked by red and green spots

• Genes marked by black and yellow spots

• Genes marked by yellow spots only

In the microarray, what does the RED color indicate?

• these genes are not expressed or turned off

• these genes are expressed or turned on in cancer

• these genes are expressed in healthy cells

• there are no genes in this cell

What happens after the DNA from the sample is applied to the DNA microarray?

• the mRNA falls off the spot

• the DNA comes apart

• the tRNA will join the complementary strand

• the cDNA will hybridize with the single stranded DNA molecules on the microarray

Which unknown gene sequences might belong to cancer-suppressor genes?

• Genes marked by red spots

• Genes marked by green spots

• Genes marked by black spots

• Genes marked by yellow spots

What is transcribed from DNA to produce a protein and is a good indication of whether or not a particular gene is expressed?

• mRNA

• cDNA

• tRNA

• trRNA

DNA Microarray is also called as

• DNA Chip

• RNA Chip

• Protein Chip

• None

When quantifying the microarray results, scientists convert the colors to what?

• numerical values or intensities
• letters or symbols
• musical notes
• geometric shapes

What does the YELLOW color indicate in DNA microarray?

• this gene is expressed in cancer cells only

• this gene is expressed in healthy cells only

• there are no genes in the cell

• this gene is expressed in both cancer and healthy cells