Gene Expression and Transcription Process

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Questions and Answers

During transcription, in which direction does RNA polymerase read the template?

  • 3' to 5' (correct)
  • In a random direction
  • 5' to 3'
  • From the middle outwards

What is the main function of the TATA box in transcription initiation?

  • Initiating DNA replication
  • Catalyzing RNA synthesis
  • Preventing RNA polymerase binding
  • Directing transcription factors to the promoter region (correct)

What is the role of RNA polymerase in transcription elongation?

  • Adds RNA nucleotides in a 5’ to 3’ direction (correct)
  • Unwinds the DNA double helix
  • Binds to the TATA box
  • Signals the start of the gene

Which step in transcription involves binding of transcription factors and RNA polymerase to a promoter?

<p>Transcription Initiation (C)</p> Signup and view all the answers

What is the significance of ribonucleotides (ATP, GTP, CTP, UTP) during transcription?

<p>Are incorporated into the growing RNA strand (B)</p> Signup and view all the answers

Which enzyme catalyzes the process of DNA-dependent RNA synthesis?

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

Which enzymes unwinds the parental double helix during DNA replication?

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

Which enzyme adds short primer to the template strand in DNA replication?

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

Where does DNA replication start at specialized sites?

<p>Origins of replication (C)</p> Signup and view all the answers

What is the function of binding proteins during DNA replication?

<p>Stabilize separate strands (B)</p> Signup and view all the answers

What occurs at replication forks during DNA synthesis?

<p>Nucleotide binding (C)</p> Signup and view all the answers

In which phase of DNA replication does Helicase unwind the double helix?

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

What is the process of copying DNA information into RNA called?

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

In RNA synthesis, what base replaces Thymine (T) in the DNA sequence?

<p>Uracil (U) (D)</p> Signup and view all the answers

Which molecules are taken out of the nucleus and into the cytoplasm after transcription?

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

What are the factors that form an apparatus binding DNA at specific sequences during transcription called?

<p>Transcription factors (B)</p> Signup and view all the answers

Which strand of DNA is the sequence used to determine what amino acids are produced through mRNA?

<p>Sense Strand (C)</p> Signup and view all the answers

What is the term for the process that follows transcription in gene expression?

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

What is the direction of synthesis for the leading strand during DNA replication?

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

Why is an RNA primer required in DNA replication?

<p>To allow DNA polymerase to add bases (C)</p> Signup and view all the answers

What is the function of DNA ligase during DNA replication?

<p>To seal the sugar-phosphate backbone (A)</p> Signup and view all the answers

Which enzyme is responsible for unwinding the DNA strands during replication?

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

What is the role of DNA polymerase in DNA replication?

<p>Adds DNA nucleotides to the RNA primer (D)</p> Signup and view all the answers

In which direction does continuous strand synthesis occur during DNA replication?

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

What is the main function of introns in the pre-mRNA molecule?

<p>To be removed before translation (D)</p> Signup and view all the answers

Why does a codon need to consist of more than one mRNA base?

<p>To increase the number of possible amino acids encoded (B)</p> Signup and view all the answers

What will happen if a DNA sequence is read in an overlapping manner?

<p>It will decrease the number of amino acids specified (C)</p> Signup and view all the answers

What is the function of the 'stop codon' UGA in translation?

<p>Indicate the end of translation (D)</p> Signup and view all the answers

Why does the genetic code need controls like 'start codon' AUG?

<p>To regulate gene expression (A)</p> Signup and view all the answers

Which term refers to the parts of mRNA that remain after introns are removed?

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

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