- Step 1: Replication Fork Formation. Before DNA can be replicated, the double stranded molecule must be “unzipped” into two single strands. …
- Step 2: Primer Binding. The leading strand is the simplest to replicate. …
- Step 3: Elongation. …
- Step 4: Termination.
What are the 4 steps of DNA replication quizlet?
- Step 1: Starts at? DNA Replication begins at the Origin of Replication.
- Step 2: Unwinds. …
- Step 3: Holds strands. …
- Step 4: Two types of strands added 3′ to 5′ …
- Step 5: RNA Primer. …
- Step 6: Add bases. …
- Step 7: Fix mistakes, remove RNA Primer. …
- Step 9: join fragments together.
What are the steps of DNA replication?
How is DNA replicated? Replication occurs in three major steps:
the opening of the double helix and separation of the DNA strands, the priming of the template strand, and the assembly of the new DNA segment
. During separation, the two strands of the DNA double helix uncoil at a specific location called the origin.
What are the 4 enzymes of DNA replication?
- Helicase (unwinds the DNA double helix)
- Gyrase (relieves the buildup of torque during unwinding)
- Primase (lays down RNA primers)
- DNA polymerase III (main DNA synthesis enzyme)
- DNA polymerase I (replaces RNA primers with DNA)
- Ligase (fills in the gaps)
What are the four characteristics of DNA replication?
These are
initiation, elongation and termination
. Elongation also has replication fork, leading strand, lagging strand, DNA replication proteins, and replication machinery. DNA replication within eukaryotes is controlled within the context of the cell cycle.
What are the 5 steps in DNA replication?
- Step 1: Replication Fork Formation. Before DNA can be replicated, the double stranded molecule must be “unzipped” into two single strands.
- Step 2: Primer Binding. The leading strand is the simplest to replicate.
- Step 3: Elongation.
- Step 4: Termination.
What are the 6 steps of DNA replication?
- Recognition of initiation point. …
- Unwinding of DNA – …
- Template DNA – …
- RNA Primer – …
- Chain Elongation – …
- Replication forks – …
- Proof reading – …
- Removal of RNA primer and completion of DNA strand –
What are the steps for replication quizlet?
- DNA polymerases. …
- Helicase unwinds our double helix into two strands.
- DNA helicase. …
- Polymerase adds nucleotides to an existing strand.
- Ligase brings together the Okazaki fragments.
- Topoisomerase. …
- Topoisomerase cuts and rejoins the helix.
- RNA primase catalyzes the synthesis of RNA primers.
What is the first step in the process of DNA replication quizlet?
The first major step for the DNA Replication to take place is
the breaking of hydrogen bonds between bases of the two antiparallel strands
. The unwounding of the two strands is the starting point. The splitting happens in places of the chains which are rich in A-T.
What is the second step of DNA replication?
During the second phase,
elongation
, DNA polymerase synthesises the new DNA from each strand; the leading strand is synthesised continuously, the lagging strand requires discontinous synthesis of smaller fragments.
Which step happens first in DNA replication?
The first step in DNA replication is
to ‘unzip’ the double helix structure of the DNA
?
molecule
. This is carried out by an enzyme
?
called helicase which breaks the hydrogen bonds
?
holding the complementary
?
bases
?
of DNA together (A with T, C with G).
What are the stages of transcription?
Transcription takes place in three steps:
initiation, elongation, and termination
. The steps are illustrated in Figure 2. Figure 2. Transcription occurs in the three steps—initiation, elongation, and termination—all shown here.
What are the four base pairs in DNA?
There are four nucleotides, or bases, in DNA:
adenine (A), cytosine (C), guanine (G), and thymine (T)
. These bases form specific pairs (A with T, and G with C).
What are the four bases of DNA you must choose four of the following?
The four bases of DNA are:
adenine (A), thymine (T), guanine (G), and cytosine (C)
.
What is the process of DNA replication in the nucleus?
During DNA replication, a number of different enzymes work together to pull apart the two strands so each strand can be used as a template to
synthesize new complementary strands
. The two new daughter DNA molecules each contain one pre-existing strand and one newly synthesized strand.
What is the correct order of enzyme action during DNA replication?
Number the steps from 1 to 7. Synthesis of RNA primers (priming) Helicase/
topoisomerase activity DNA polymerization/proofreading 5′-3’exonuclease activity/DNA polymerization
Ligation Single-stranded binding proteins bind and preventreannealing Binding to origin of replication (AT rich.
