Chpt 17. Part 1: Transcription Quiz

According to the central dogma, what is the intermediate molecule involved in the flow of information in a cell that should go in the blank? DNA → ________ → Proteins

• Ribosome

• RNA

• Carbohydrates

• Lipids

The FULL process by which genotype becomes expressed as phenotype is called:

• transcription

• translation

• DNA replication

• gene expression

Which of the following statements is false?

• Transcription is the process that creates an RNA product from a sequence of DNA.

• RNA polymerase builds RNA molecules from a DNA template.

• A promoter is a sequence of DNA within a gene where RNA polymerase can begin transcription.

• RNA polymerase, like DNA polymerase, requires a primer to begin RNA synthesis.

The strand of DNA that has the same sequence as the RNA molecule being created during transcription is the:

• lagging strand

• leading strand

• template strand

• parental strand

• coding strand

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

• Anticodons

• Ribosomes and tRNA

• Transcription factors

• Aminoacyl-tRNA synthetase

During transcription of DNA to RNA:

• The 3' end of the RNA molecule is produced first.

• The RNA polymerase must first bind to a promoter sequence.

• The coding strand of DNA is used by mRNA

What happens during the initiation step of DNA transcription?

• The mRNA detaches from the RNA polymerase as the RNA polymerase leaves the DNA strand.

• RNA polymerase attaches to the DNA at the promoter sequence of the gene.

• A ribosome attaches to the initiation codon of a completed mRNA strand.

• RNA polymerase moves along the template strand of the DNA creating an mRNA strand.

A mRNA poly-A tail:

• Prevents translation.

• Marks the mRNA for degradation.

• Protects the mRNA from degradation.

• Prevents transcription.

The regions in RNA that encode actual gene products are known as:

• Terminators.

• mRNA.

• Exons.

• Introns.

Which accurately describes the usual process of eukaryotic transcription?

• Introns are not transcribed.

• Both introns and exons are transcribed, but the RNA transcribed from introns does not leave the nucleus.

• Both introns and exons are transcribed, but neither type of transcribed region leaves the nucleus.

• Exons are not transcribed.