Transcription Elongation Process
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Questions and Answers

What is the direction of RNA polymerase unwinding the double helix during transcription elongation?

  • 3' to 3'
  • 3' to 5' (correct)
  • 5' to 5'
  • 5' to 3'

Which base pairs with Adenine in RNA during transcription?

  • Cytosine
  • Uracil (correct)
  • Guanine
  • Thymine

What is the purpose of capping the ends of the mRNA during transcription termination?

  • To promote splicing
  • To enhance translation efficiency
  • To change the mRNA sequence
  • To protect the strand from enzyme degradation (correct)

What is the function of introns in gene expression?

<p>They do not code for anything and are removed during splicing (B)</p> Signup and view all the answers

What is the purpose of alternate splicing in gene expression?

<p>To combine exons of a gene in different ways (C)</p> Signup and view all the answers

Which type of sequence does not code for anything and is removed through splicing?

<p>Introns (A)</p> Signup and view all the answers

What type of bond forms between the amino acid brought by the second tRNA and the methionine brought in by the first tRNA?

<p>Peptide bond (C)</p> Signup and view all the answers

What happens in the termination process of protein synthesis?

<p>The protein release factor binds to the stop codon (C)</p> Signup and view all the answers

Which level of protein structure involves bonds between the R groups shaping the three-dimensional form?

<p>Tertiary structure (D)</p> Signup and view all the answers

What is the secondary structure of proteins mainly characterized by?

<p>Amino acid sequence getting close together (B)</p> Signup and view all the answers

What process occurs after translation in protein synthesis?

<p>Formation of amino acids (D)</p> Signup and view all the answers

What affects the folding of proteins into three-dimensional shapes?

<p>Attractions and repulsions between components (A)</p> Signup and view all the answers

What structures are formed when DNA double helix is opened at the origins of replication?

<p>Replication forks (D)</p> Signup and view all the answers

In which direction is the leading strand synthesized during DNA replication?

<p>5' to 3' (C)</p> Signup and view all the answers

What is the role of transcription factors in transcription?

<p>Initiate transcription (A)</p> Signup and view all the answers

How is the lagging strand replicated during DNA replication?

<p>Discontinuously as fragments joined later (C)</p> Signup and view all the answers

Where does DNA synthesis occur during DNA replication?

<p>At the replication forks (B)</p> Signup and view all the answers

What type of proteins does human genes encode?

<p>$20,325$ types of proteins (D)</p> Signup and view all the answers

What is the primary function of chaperone proteins in protein folding?

<p>Stabilize partially folded regions (A)</p> Signup and view all the answers

What happens to misfolded proteins tagged with ubiquitin?

<p>They are taken back to the Endoplasmic Reticulum (C)</p> Signup and view all the answers

How do proteins with multiple tags get processed within the cell?

<p>They are taken to a proteasome for degradation (B)</p> Signup and view all the answers

What is the main role of a signal sequence in protein secretion?

<p>Signal the beginning of translation (B)</p> Signup and view all the answers

Which level of protein structure involves bonds between multiple polypeptide chains?

<p>Quaternary structure (A)</p> Signup and view all the answers

What is the Central Dogma theory?

<p>Genetic information flows from DNA to RNA to protein. (A)</p> Signup and view all the answers

During which phase of Cell Division does DNA replication occur?

<p>S phase (C)</p> Signup and view all the answers

Which model of DNA replication proposed that only one strand of DNA is copied?

<p>Semiconservative Model (B)</p> Signup and view all the answers

What did Matthew Meselson and Franklin Stahl demonstrate in 1957 regarding DNA replication?

<p>DNA replicates via a semiconservative mechanism. (B)</p> Signup and view all the answers

What is the final step in the Central Dogma process?

<p>Translation (A)</p> Signup and view all the answers

When does a parental cell need to duplicate its entire genome?

<p>Before Cell Division (A)</p> Signup and view all the answers

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