DNA, mRNA, and Protein Synthesis Review

Which of the following correctly describes the relationship between DNA and mRNA during transcription?

• mRNA is an identical copy of the DNA strand

• mRNA is made using complementary base pairing from DNA

• DNA is translated directly into a protein

• DNA leaves the nucleus to form mRNA

What is the correct sequence of events for protein synthesis?

• DNA → Protein → mRNA

• Protein → mRNA → DNA

• DNA → RNA → Protein

• RNA → DNA → Protein

What is the role of tRNA in translation?

• It copies DNA into mRNA

• It delivers amino acids to the ribosome

• It carries the protein to the nucleus

• It breaks apart mRNA codons

What are the building blocks of proteins called?

• DNA
• RNA
• Ribosomes
• Amino Acids

Tags

NGSS.HS-LS1-1

NGSS.HS-LS1-6

Given the DNA sequence TAC GGA CTA, what is the corresponding amino acid sequence? Use a codon chart. (hint DNA -> RNA -> AA)

• Tyr-Gly-Ser

• Met-Gly-Leu

• Met-Pro-Leu

• Met-Pro-Asp

Tags

NGSS.HS-LS1-1

A mutation causes a DNA codon to change from TAT to TAA. What is the likely result? (DNA-RNA-AA)

• No change in the protein

• A different amino acid is added

• A stop codon is created, ending the protein early

• Transcription will not occur

Tags

NGSS.HS-LS1-1

NGSS.HS-LS3-2

Why is RNA necessary to act as a messenger between DNA and ribosomes?

• Ribosomes are located inside the nucleus

• RNA contains the original copy of the genetic code

• DNA cannot leave the nucleus, but proteins are made in the cytoplasm

• tRNA cannot function without mRNA

Based on the image shown, which process is taking place?

• Replication

• Translation

• Transcription

• Cell Division

What will be the resulting mRNA from this DNA sequence:
GAT-TAC-AGA-TTA-CAT?

• CTA-ATG-TCT-AAT-GTA
• CUA-UAG-UGA-UUA-GUT

• CUA-AUG-UCU-AAU-GUA
• CAT-ACA-TAC-ATA-TAG
  

The image shows the production of petal color in a flower. What can be concluded from the diagram?

• DNA and a protein mix together to produce purple flowers.

• Proteins stop the DNA from keeping the flower petals white.

• DNA codes for a protein that makes pigments so the flower appears purple.

• A pigment protein makes DNA, which causes the flower to appear purple.

Answer explanation

The correct choice states that DNA codes for a protein that produces pigments, resulting in purple flower petals. This highlights the role of DNA in determining flower color through protein synthesis.

Tags

NGSS.HS-LS1-1