Which statement about DNA replication is FALSE?
DNA ligase adds nucleotides to the lagging strand
. This statement is FALSE. DNA ligase joins the Okazaki fragments in the lagging strand, turning it into a continuous strand.
Which statement is false about DNA replication?
Which statement about DNA replication is FALSE?
DNA ligase adds nucleotides to the lagging strand
. This statement is FALSE. DNA ligase joins the Okazaki fragments in the lagging strand, turning it into a continuous strand.
Which of the following statement is not applicable for DNA replication?
When an incorrect base pair is recognized, DNA polymerase moves backward by one base pair of DNA. The 3’–5′ exonuclease activity of the enzyme allows the incorrect base pair to be excised (this activity is known as proofreading). So, the incorrect statement is “
D
“.
What is correct about DNA replication?
DNA replication is
the process by which DNA makes a copy of itself during cell division
. … The separation of the two single strands of DNA creates a ‘Y’ shape called a replication ‘fork’. The two separated strands will act as templates for making the new strands of DNA.
What is faulty DNA replication?
Replication errors can also involve
insertions or deletions of nucleotide bases
that occur during a process called strand slippage. Sometimes, a newly synthesized strand loops out a bit, resulting in the addition of an extra nucleotide base (Figure 3).
Is DNA replication a Semiconservative process?
DNA replication is a
semi-conservative process
, because when a new double-stranded DNA molecule is formed: One strand will be from the original template molecule.
What is the first thing to occur in DNA replication quizlet?
RNA primase lays down
an RNA primer
to start DNA replication.
Where does DNA replication occur?
DNA replication occurs
in the cytoplasm of prokaryotes and in the nucleus of eukaryotes
. Regardless of where DNA replication occurs, the basic process is the same. The structure of DNA lends itself easily to DNA replication. Each side of the double helix runs in opposite (anti-parallel) directions.
Which sugar is present in DNA?
The sugar in deoxyribonucleic acid (DNA) is
deoxyribose
. The deoxy prefix indicates that the 2′ carbon atom of the sugar lacks the oxygen atom that is linked to the 2′ carbon atom of ribose (the sugar in ribonucleic acid, or RNA), as shown in Figure 5.2.
Does DNA replication occur before cell division?
Explanation: DNA replication needs to occur because existing cells divide to produce new cells. … So
the DNA needs to be copied before cell division
so that each new cell receives a full set of instructions! Here is a video which uses an animated tutorial to explain the process of DNA replication.
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 three steps in DNA replication?
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 is the order of enzymes in 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)
What problems can occur with DNA replication?
DNA replication is a highly accurate process, but mistakes can occasionally occur, such as a DNA polymerase inserting a wrong base. Uncorrected mistakes may sometimes lead to serious consequences, such as
cancer
. Repair mechanisms correct the mistakes.
What happens when DNA replication is incomplete?
What would happen if cell division of a body cell took place without DNA replication, or when DNA replication was incomplete? During cell division, one cell divides to produce two new cells. … If DNA replication did not take place fully, or at all,
the offspring cells would be missing some or all of the genome
.
What will happen if DNA replication does not occur?
The DNA replication occurs at the synthesis phase of the cell cycle. The cell cycle is regulated at each stage. If DNA replication does not occur, then
the cell cycle will not proceed to the next stage and the subsequent division will not happen
. It will lead to cell death.
