Question

repressor
promoter
rna polymerase
mrna
match the term to its function in gene expression
transfers amino acids to the ribosome
enzyme that makes new rna strand
dissolves the dna
carries genetic code to ribosome
turns gene off by blocking transcription
binds dna to start transcription

Explanation:

• Repressor: A protein that turns gene off by blocking transcription. It can bind to specific DNA regions (like operators in operon systems) to prevent RNA polymerase from accessing the gene for transcription.
• Promoter: A DNA sequence that binds RNA polymerase to start transcription. It is a crucial regulatory region as it provides the site for the initiation of RNA synthesis.
• RNA polymerase: An enzyme that makes new RNA strand. It reads the DNA template strand and synthesizes a complementary RNA molecule during transcription.
• mRNA (messenger RNA): Carries genetic code to ribosome. It is transcribed from DNA and then translated by ribosomes to produce proteins, carrying the information (genetic code) from genes.

Answer:

• Repressor: Turns gene off by blocking transcription
• Promoter: Binds DNA to start transcription
• RNA polymerase: Enzyme that makes new RNA strand
• mRNA: Carries genetic code to ribosome