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Gene Expression: Transcription Overview

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Questions and Answers

Which phase of the cell cycle does DNA replication occur?

S phase (correct)

G2 phase

M phase

G1 phase

What is the first step in the basic flow of DNA Replication?

Sugar-phosphate backbones close

Hydrogen bonds break

Parental strands unwind and separate

Parent DNA molecule (correct)

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

Semiconservative model (correct)

Conservative model

Dispersive model

None of the above

What breaks to allow the separation of base pairs during DNA replication?

Hydrogen bonds (A) Signup and view all the answers

When must the parental cell duplicate its entire genome in preparation for cell division?

S phase (C) Signup and view all the answers

Which enzymes are responsible for binding nucleotides to form new DNA strands in DNA replication?

DNA Polymerase (A) Signup and view all the answers

What is the function of helicase in DNA replication?

Unwinds the parental double helix (A) Signup and view all the answers

How many phases can DNA replication be divided into?

Three (A) Signup and view all the answers

What are the sites at which single-stranded DNA is exposed during DNA replication?

Replication forks (C) Signup and view all the answers

In DNA replication, what does primase do?

Adds short primer to the template strand (A) Signup and view all the answers

What did Matthew Meselson and Franklin Stahl rule out regarding DNA replication mechanisms?

Conservative model (A) Signup and view all the answers

What is the process of copying DNA information into RNA known as?

Transcription (A) Signup and view all the answers

Which of the following is NOT a step in gene expression?

Replication (A) Signup and view all the answers

What replaces Thymine (T) in RNA sequences?

Uracil (U) (A) Signup and view all the answers

Which strand of DNA is used as a template for RNA synthesis?

Template Strand (B) Signup and view all the answers

What initiates transcription at specific sites on chromosomes?

Transcription Factors (C) Signup and view all the answers

Which strand of DNA is the complement of the RNA that is produced?

<ul> <li>AntiSense Strand (B)</li> </ul> Signup and view all the answers