Worksheet: Protein Synthesis

In this worksheet, we will practice describing the processes of transcription and translation, and explaining how DNA controls protein synthesis.

Q1:

Which of the following is not correct about tRNA?

  • AA tRNA molecule will bind to an mRNA codon.
  • BtRNA molecules contain 3 nucleotide bases that code for an amino acid.
  • CtRNA stands for temporary RNA.
  • DtRNA stands for transfer RNA.

Q2:

How many bases in a row form a codon?

Q3:

In mRNA, which DNA base is replaced with uracil (U)?

  • AC
  • BG
  • CNone
  • DT
  • EA

Q4:

What organelle is the site of translation?

  • AMitochondria
  • BCell membrane
  • CVacuole
  • DNucleus
  • ERibosome

Q5:

The diagram provided shows mRNA undergoing translation.

What is represented by label 1?

  • ARibosome
  • BAmino acid
  • CtRNA
  • DmRNA

What is represented by label 2?

  • AmRNA
  • BRibosome
  • CAmino acid
  • DtRNA

What is represented by label 3?

  • ARibosome
  • BtRNA
  • CmRNA
  • DAmino acid

Q6:

Which of the following is not correct about DNA and protein synthesis?

  • AA mutation in the DNA could result in a different sequence of amino acids being formed.
  • BEach protein made has a specific shape relating to its function.
  • CA mutation in the DNA could result in a different protein being made.
  • DThe DNA produces a template for the resulting protein.
  • EA chain of amino acids forms a section of DNA.

Q7:

The diagram shows a strand of DNA undergoing transcription.

What is represented by label 1?

  • ARNA
  • BmRNA
  • CDNA
  • DRNA polymerase

What is represented by label 2?

  • ARNA polymerase
  • BRNA
  • CmRNA
  • DDNA

What is represented by label 3?

  • ARNA
  • BDNA
  • CRNA polymerase
  • DmRNA

Q8:

What happens to the mRNA after transcription?

  • AIt leaves the cell through the pores in the cell membrane.
  • BIt attaches to RNA polymerase.
  • CIt remains within the nucleus ready for translation.
  • DIt dissolves into the cytoplasm.
  • EIt leaves the nucleus through the pores in the nuclear membrane.

Q9:

Which of the following describes how a polypeptide chain is formed?

  • AThe ribosome moves along the mRNA strand and joins the amino acids together.
  • BmRNA catalyzes the formation of polypeptide bonds.
  • CThe ribosome moves along the DNA and joins the mRNA together.
  • DThe amino acids are joined with hydrogen bonds.
  • EtRNA catalyzes the reaction between amino acids to form bonds.

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