8.4 Quizizz: Transcription

The central dogma of molecular biology states that information flows in one direction from a. b. c. d.

• nuclei to RNA to cytoplasm.

• ribosomes to proteins to DNA.

• genes to nuclei to ribosomes.

• DNA to RNA to proteins.

Choose the nucleotide sequence of the RNA strand that would be complementary to the following DNA strand: GTAGTCA.

• UATUAGA

• ACGACTG

• CAUCAGU

• CATCAGT

The main function of tRNA is to

• carry a message that, when translated, forms proteins.

• form a portion of ribosomes, a cell’s protein factories.

• string together complementary RNA and DNA strands.

• bring amino acids from the cytoplasm to the ribosomes.

Which of the following events occurs directly after RNA polymerase recognizes the transcription start site of a gene?

• The polymerase strings amino acids into a polypeptide.

• Free-floating nucleotides pair up with exposed DNA bases.

• A complementary RNA strand detaches itself from the DNA.

• The DNA strand begins to unwind, separating the two strands.

A primary difference between transcription and replication is that transcription

• happens repeatedly throughout a single cell cycle.

• occurs within the nucleus of eukaryotic cells.

• is catalyzed by large and complex enzymes.

• proceeds according to careful cellular control.