Molecular Biology Quiz

What is the role of DNA in the central dogma of molecular biology?

• It acts as a temporary photocopy of a gene.

• It is synthesized by ribosomes.

• It is a cell’s genetic blueprint organized into instructions.

• It provides catalytic activity for combining amino acids.

Which process involves the synthesis of RNA using a DNA template?

• Translation

• Transcription

• Replication

• Mutation

What is the function of the promoter in a gene?

• It stops transcription by RNA polymerase.

• It is the region of DNA transcribed into RNA.

• It is the site where RNA polymerase binds to initiate transcription.

• It carries protein subunits to the mRNA transcript.

Which type of RNA carries protein subunits to the mRNA transcript for assembly?

• Messenger RNA (mRNA)

• Transfer RNA (tRNA)

• Ribosomal RNA (rRNA)

• Nuclear RNA (nRNA)

What is the role of ribosomal RNA (rRNA) in protein synthesis?

• It encodes the protein sequence.

• It acts as a temporary photocopy of a gene.

• It provides catalytic activity for combining amino acids.

• It stops transcription by RNA polymerase.

What is the process by which a DNA sequence is copied into complementary RNA sequences?

• Translation

• Transcription

• Replication

• Mutation

Which enzyme is responsible for separating the double-stranded DNA during transcription?

• DNA ligase

• RNA polymerase

• DNA polymerase

• Helicase

What type of proteins bind to enhancer sites to increase transcription rates?

• Repressor proteins

• Activator proteins

• Structural proteins

• Enzymatic proteins

What is the study of changes in organisms as a result of variations in gene expression levels called?

• Genetics

• Epigenetics

• Genomics

• Proteomics

What is the totality of proteins expressed within a cell or organism at a particular time called?

• Genome

• Proteome

• Transcriptome

• Metabolome