Muscle cells and nerve cells in one species of animal owe their differences in structure to

• having different genes.

• having different genes expressed.

Tags

NGSS.HS-LS3-2

If you were to observe the activity of methylated DNA, you would expect it to

• be unwinding in preparation for protein synthesis.

• have turned off or slowed down the process of transcription.

Which enzyme was used to produce the molecule in the Figure?

• ligase

• a restriction enzyme

Which of the following describe the structure of mature RNA? (more than 1 answer applies)

• Contains Uracil

• Contains introns and exons

• Has a poly-A tail and 5' cap

• Single stranded

• Circular strand

Which of the following occur during RNA processing? (more than 1 answer applies)

• exons can be removed

• spliceosomes remove introns

• a poly-A tail and GTP cap are added

• DNA helicase unzips DNA

• activator sequences initiate transcription

Introns are significant to biological evolution because

• their presence allows exons to be shuffled.

• they protect the mRNA from degeneration.

A mutation in which of the following parts of a gene is likely to be most damaging to a cell?

• intron

• exon

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

Why might a point mutation in DNA make a difference in the level of proteinʹs activity?

• It might substitute an amino acid in the active site.

• It might exchange one stop codon for another stop codon.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

RNA polymerase moves in which direction along the DNA?

• 3ʹ → 5ʹ along the template strand

• 3ʹ → 5ʹ along the coding (sense) strand

Which of the following mechanisms is primarily responsible for the regulation of gene expression in eukaryotic cells?

• DNA methylation

• RNA splicing

• Protein folding

• Lipid modification