Unit 8 retest

What is the significance of gene expression?

• It ensures DNA replication occurs.

• It determines which proteins a cell produces.

• It regulates the energy production of the cell.

• It organizes chromosomes into genes.

Tags

NGSS.HS-LS1-1

How is gene expression regulated?

• By the amount of DNA in the cell.

• Through random mutations in the gene.

• By cell differentiation and environmental factors.

• By the shape of the ribosome.

Which of the following outlines the correct sequence of events in protein synthesis?

• DNA → mRNA → Protein

• mRNA → DNA → Protein

• Protein → mRNA → DNA

• DNA → Protein → mRNA

Tags

NGSS.HS-LS1-1

Transcribe and translate the following DNA sequence: DNA: TACGCCGTIGTA. What is the correct mRNA sequence and resulting amino acid chain after transcription and translation? Use the codon chart for translation.

• mRNA: AUGCGGCAAUGA; Amino Acids: Methionine, Arginine, Glutamine, Stop

• mRNA: AUGCGGCAUCAU; Amino Acids: Methionine, Arginine, Histidine, Stop

• mRNA: AUGCGGCAAUUA; Amino Acids: Methionine, Arginine, Glutamine, Leucine

• mRNA: AUGGCCAAUGUU; Amino Acids: Methionine, Alanine, Asparagine, Valine

Tags

NGSS.HS-LS1-1

What is the complementary mRNA sequence for the DNA sequence TACGAA?

• AUGCUU

• ATGCGA

• UACGAA

• AUGCAA

What role does tRNA play in protein synthesis?

• It carries the DNA to the ribosome.

• It transports amino acids to the ribosome.

• It forms the ribosome structure.

• It converts DNA into RNA.

Using the codon chart, what is the amino acid sequence for the mRNA codon sequence AUG-GGU-UAA?

• Methionine-Glycine-Stop

• Arginine-Glycine-Tyrosine

• Alanine-Glutamine-Stop

• Methionine-Glycine-Start

Contains the bases adenine, uracil, cytosine, and guanine.

• DNA

• RNA

• Both

If you see a ribosome and amino acids being added to a growing chain, which stage of protein synthesis is occurring?

• Transcription

• Translation

• Replication

• DNA repair

Which process is shown in the diagram above?

• Transcription

• Translation

• Replication

• DNA repair