Gene Expression: Transcription Overview

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What is the function of helicase in DNA replication?

Joins Okazaki fragments

Binds nucleotides to form new strands

Adds short primers to the template strand

Unwinds the parental double helix (correct)

What is the role of binding proteins in DNA replication?

Stabilize separate strands (correct)

Unwinds the parental double helix

Adds short primers to the template strand

Joins Okazaki fragments

Which enzyme binds nucleotides to form new strands in DNA replication?

Helicase

Ligase

Primase

DNA Polymerase (correct)

Where do replication forks form during DNA replication?

Origins of replication Signup and view all the answers

At which sites does DNA synthesis occur during DNA replication?

Replication bubbles Signup and view all the answers

During which phase of the cell cycle does DNA replication occur?

S phase Signup and view all the answers

What is the main function of DNA Replication?

Duplicating the entire genome Signup and view all the answers

Which model of DNA replication conserves half of the original DNA in each new double helix?

Semiconservative model Signup and view all the answers

What happens in step 4 of the basic flow of DNA Replication?

Sugar-phosphate backbones of daughter strands close Signup and view all the answers

Why must DNA replication be coordinated with chromosome segregation?

To ensure proper distribution of genetic material to daughter cells Signup and view all the answers

What is removed and the ends spliced together before translation into protein?

Introns Signup and view all the answers

Which parts of the gene remain after the removal of introns for translation to protein?

Exons Signup and view all the answers

What is the genetic code's correspondence between?

mRNA and protein Signup and view all the answers

How many different amino acids make up biological proteins?

20 Signup and view all the answers

Which sequence serves as the start codon in translation?

AUG Signup and view all the answers

What does a stop codon indicate in translation?

<code>End of translation</code> Signup and view all the answers

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

Transcription Signup and view all the answers

Which of the following is true about the DNA coding strand in RNA synthesis?

It contains Uracil (U) instead of Thymine (T). Signup and view all the answers

What initiates transcription at specific sites on chromosomes?

Transcription factors Signup and view all the answers

What is the function of Transcription factors in gene expression?

Binding DNA at specific sequences to initiate transcription Signup and view all the answers

Which strand of DNA is used for RNA synthesis of a particular RNA product?

Template Strand Signup and view all the answers

During translation initiation, the start codon (AUG) attracts which type of tRNA?

Initiator tRNA carrying Methionine Signup and view all the answers

What happens when the ribosome moves down the mRNA by one codon during translation elongation?

The tRNA at the P site is released Signup and view all the answers

In translation, which subunit of the ribosome bonds to the initiation complex?

Large ribosomal subunit Signup and view all the answers

What signifies the start of a polypeptide during translation initiation?

Initiator tRNA binding to the mRNA Signup and view all the answers

When does a third tRNA bring in its amino acid during translation elongation?

After the first tRNA is released Signup and view all the answers

Which molecule forms hydrogen bonds with the small ribosomal subunit in translation initiation?

Leader sequence of mRNA Signup and view all the answers