IB Biology 2.7 transcription & translation

Where are amino acids joined together to make polypeptides?

• Nucleus

• Nucleolus

• Golgi apparatus

• Ribosomes

The base sequence of a fragment of DNA is:

ACC GTG CAG GAT

What is the base sequence on the messenger RNA (mRNA) molecule transcribed from it?

• TGG CAC GTC CTA

• TGG CUC GTC CTU

• UGG CTC GUC CUT

• UGG CAC GUC CUA

Which points to the 3′ end of a strand of DNA?

• I

• II

• III

• IV

What is formed during transcription?

• RNA strand complementary to DNA strand, formed by RNA polymerase

• DNA strand complementary to DNA strand, formed by DNA polymerase

• RNA strand complementary to RNA strand, formed by DNA polymerase

• DNA strand complementary to RNA strand, formed by RNA polymerase

Which of the following are involved in both translation and transcription?

• complimentary base pairing

• DNA and RNA

• DNA and ribosomes

• RNA and ribosomes

What is the sequence of the amino acids that is being translated from the following mRNA sequence?

5' AUG GGU GCU UAU UGG UAA 3'

• Met-Pro-Arg-Ile-Thr

• Met-Cys-Ser-Tyr-Trp

• Met-Gly-Ala-Tyr-Trp

• Met-Gly-Tyr-Ala-Thr

What is a codon?

• A sequence of nucleotides on rRNA that corresponds to an amino acid

• A sequence of nucleotides on mRNA that corresponds to an amino acid

• A sequence of nucleotides on tRNA that corresponds to an amino acid

• A sequence of nucleotides on DNA that corresponds to an amino acid

Which one of the following happens during translation?

• Copying of mRNA to produce tRNA

• Copying of DNA to produce mRNA

• Binding of a specific tRNA molecule to an mRNA codon

• Polysaccharide synthesis

Which molecule is not involved in the transcription of a gene?

• DNA antisense strand

• helicase

• RNA nucleotide

• RNA polymerase

Which one of the following best describes the role of tRNA molecules?

• transport the mRNA from the nucleus to the ribosome

• bring a specific amino acid to a ribosome that is added to a polypeptide chain

• bind to the anticodon on the mRNA molecule

• make up the structure of a ribosome