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Transcription and translation test

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Lesson 34 & 35

Question 1 of 11

1

Which of these are substrates of transcription of DNA?

Select one of the following:

  • ATP, CTP, GTP and UTP

  • AMP, CMP, GMP and UMP

  • ATP, CTP, GTP and TTP

  • AMP, CMP, GMP and TMP

  • None of these

Explanation

Question 2 of 11

1

What is able to do the enzyme RNA polymerase II?

Select one of the following:

  • 1.) Unwind the helix of DNA

  • 2.) Catalyze the synthesis of one molecule of DNA

  • 3.) Correct and error in the transcription

  • 1.) and 2.) are true

  • All are true

Explanation

Question 3 of 11

1

What is a transcription factor?

Select one of the following:

  • A protein that will bind to DNA and RNA polymerase

  • A region in DNA sequence that will indicate where is the start of transcription

  • A region in DNA sequence that will indicate where is the end of transcription

  • A molecule that will induce the formation of what is called "bubble of transcription"

  • One enzyme that is necessary to phosphorylate RNA polymerase

Explanation

Question 4 of 11

1

RNA polymerase will be phosphorylated just after the "bubble of transcription" is formed

Select one of the following:

  • True
  • False

Explanation

Question 5 of 11

1

Which of these statements is not true?

Select one of the following:

  • 5' capping consists in introduce a protection in the end of the non-mature RNA to avoid the degradation of DNA

  • An AAA (An) tail (Non-coding end sequence) is introduced to eliminate some sequence introduced in the intron

  • After RNA molecule is finished, there is going to be introduced a polyadenyl tail in the 5' end

  • The intron of DNA will be cut by a process called splicing

  • One exon is the area of the sequence of DNA that is transcripted and translated

Explanation

Question 6 of 11

1

Which codon indicate when the sequence starts?

Select one of the following:

  • UUA

  • UGA

  • CCG

  • AGA

  • AUG

Explanation

Question 7 of 11

1

How many possible reading frames exist?

Select one of the following:

  • 1

  • 2

  • 3

  • 4

  • 5

Explanation

Question 8 of 11

1

During initiation of translation...

Select one of the following:

  • mRNA is going to bind to the small ribosomal subunit

  • mRNA is going to bind to the large ribosomal subunit

  • An amino acid enters in the Site A of the ribosome

  • Methionine is placed in the Site E of the ribosome

  • An amino acid linked to a tRNA enters to the Site P of the ribosome

Explanation

Question 9 of 11

1

During elongation, the second amino acid in the protein will enter in the Site A of the ribosome linked to a tRNA

Select one of the following:

  • True
  • False

Explanation

Question 10 of 11

1

If a molecule of insulin is synthesized, what does it lose when it reach the place where is needed?

Select one of the following:

  • Methionine

  • Signal peptide

  • A fragment of the sequence, because a fragmentation is done

  • Its inicial n-dimensional shape (a refolding of the protein is made)

  • Any of these

Explanation

Question 11 of 11

1

Which is the name of the molecules that refold proteins?

Select one of the following:

  • Chaperons

  • Aggregates

  • Folders

  • Cleavage factors

  • Refolding factors

Explanation

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