AP Bio Transcription

In the transcription event of the DNA in Figure 14.3, where would the promoter be located?

• to the right of the sense strand

• at the 3' end of the newly made RNA

• to the right of the template strand

• to the left of the sense strand

• to the left of the template strand

Which of the following does not occur in prokaryotic gene expression, but does occur in eukaryotic gene expression?

• A poly-A tail is added to the 3' end of an mRNA and a cap is added to the 5' end.

• Transcription can begin as soon as translation has begun even a little.

• RNA polymerase requires a primer to elongate the molecule.

• RNA polymerase binds to the promoter.

• mRNA, tRNA, and rRNA are transcribed.

Transcription in eukaryotes requires which of the following in addition to RNA polymerase?

• aminoacyl-tRNA synthetase

• ribosomes and tRNA

• the protein product of the promoter

• start and stop codons

• several transcription factors

Which of the following best describes the significance of the TATA box in eukaryotic promoters?

• It signals the end of the nucleotide sequence of the gene.

• It is the recognition site for a specific transcription factor.

• It is the recognition site for ribosomal binding.

• It sets the reading frame of the mRNA.

A eukaryotic transcription unit that is 8,000 nucleotides long may use 1,200 nucleotides to make a protein consisting of approximately 400 amino acids. This is best explained by the fact that

• there is redundancy in the genetic code.

• there are termination exons near the beginning of mRNA.

• many nucleotides are needed to code for each amino acid.

• many noncoding stretches of nucleotides are present in eukaryotic DNA.

Which of the following statements correctly describes alternative RNA splicing?

• It increases the rate of transcription.

• It is a mechanism that can increase the rate of transcription.

• It can allow the production of proteins of different sizes and functions from a single mRNA.

• It allows the production of similar proteins from different RNAs.

Tags

NGSS.HS-LS1-1

The nontemplate strand of a portion of a gene reads

5′ ACT GGT TCA. What will be the sequence of the resulting transcript for this portion?

• 5′ UGA CCA AGU

• 5′ ACU GGU UCA

• 5′ UGA ACC AGU

• 5′ ACU UGG UCA

Tags

NGSS.HS-LS1-1

RNA polymerase moves in which direction along the DNA?

• 5' to 3' along the double-stranded DNA

• 3' to 5' along the template strand

• 3' to 5' along the nontemplate strand

• 5' to 3' along the template strand

• 5' to 3' along whichever strand it's on

Which of the following is the best example of gene expression?

• A frog adapts to variation in its environmental temperature.

• Mouse fur color results from pigment formed by gene-encoded enzymes.

• DNA is replicated during the S phase of the cell cycle.

• The percent of A versus a alleles in a population is altered by natural selection.

• Mutation alters the sequence of a region of DNA.

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-1

NGSS.HS-LS3-2

What kind of molecules are transcription factors?

• DNA

• RNA

• proteins

• lipids