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Anonymous bunnyliv
wrote...
A week ago
please help me answer these questions!


Put the following steps of DNA replication in order.

Question options:

A group of enzymes, called the helicases, bind to the DNA at each replication origin.

DNA polymerase can only synthesize the new nucleotide chain in the 5´ to 3´ direction.

New DNA strands are produced when an enzyme called DNA polymerase inserts into the replication bubble.  A primase enzyme synthesizes an RNA primer that serves as the starting point of new nucleotide attachment by DNA polymerase

As a result, one strand (the leading strand) is replicated continuously in the 5´ to 3´ direction in the same direction that the replication fork is moving.

These fragments, called Okazaki fragments, are spliced together by DNA ligase.

Replication ends with each new molecule of DNA containing one parent strand and one new strand.

The other strand, known as the lagging strand, is replicated in short segments, still in the 5´ to 3´ direction, but away from the replication fork.

Replication begins with a specific nucleotide sequence called the replication origin.

When replication is complete, DNA polymerase dismantles the RNA primer and proofreads the nitrogen base pairing of the two new DNA molecules.

The helicases cleave and unravel a section of the original double helix, creating Y-shaped areas (replication forks) at the end of the unwound areas, which form a replication bubble.


Match the following characteristics with either DNA or RNA

Question  options:

Deoxyribose sugar


Cytoplasm


One form (type)


Nucleus


Double strands


Uracil


Bacteria


Single stranded, but may fold on back itself


Ribose sugar


Three forms (type)


PO4


Located in the mitochondria


Thymine

1.   
DNA

2.   
RNA

3.   
Both RNA and DNA

4.   
Neither RNA or DNA


What is meant by semi-conservative replication?

Question  options:

This means that each new molecule of RNA contains one strand of the original parent RNA and one strand of new, complementary RNA. Each new RNA molecule thus contains half of the original molecule.


This means that each new molecule of RNA contains two strands of the original parent RNA and two strands of new, complementary RNA. Each new RNA molecule thus contains a whole of the original molecule.

 


This means that each new molecule of DNA contains one strand of the original parent DNA and one strand of new, complementary DNA. Each new DNA molecule thus contains half of the original molecule.


This means that each new molecule of DNA contains two strands of the original parent DNA and two strands of new, complementary DNA. Each new DNA molecule thus contains a whole of the original molecule.


thank you!!
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hello123456hello123456
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A week ago
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2) A group of enzymes, called the helicases, bind to the DNA at each replication origin.

5) DNA polymerase can only synthesize the new nucleotide chain in the 5´ to 3´ direction.

4) New DNA strands are produced when an enzyme called DNA polymerase inserts into the replication bubble.  A primase enzyme synthesizes an RNA primer that serves as the starting point of new nucleotide attachment by DNA polymerase

6) As a result, one strand (the leading strand) is replicated continuously in the 5´ to 3´ direction in the same direction that the replication fork is moving.

8) These fragments, called Okazaki fragments, are spliced together by DNA ligase.

10) Replication ends with each new molecule of DNA containing one parent strand and one new strand.

7) The other strand, known as the lagging strand, is replicated in short segments, still in the 5´ to 3´ direction, but away from the replication fork.

1) Replication begins with a specific nucleotide sequence called the replication origin.

9) When replication is complete, DNA polymerase dismantles the RNA primer and proofreads the nitrogen base pairing of the two new DNA molecules.

3) The helicases cleave and unravel a section of the original double helix, creating Y-shaped areas (replication forks) at the end of the unwound areas, which form a replication bubble.



Deoxyribose sugar DNA


Cytoplasm DNA and RNA


One form (type) Neither RNA or DNA


Nucleus DNA and RNA


Double strands DNA


Uracil RNA


Bacteria DNA and RNA


Single stranded, but may fold on back itself RNA


Ribose sugar RNA


Three forms (type) RNA


PO4 DNA and RNA


Located in the mitochondria DNA and RNA


Thymine DNA



This means that each new molecule of DNA contains one strand of the original parent DNA and one strand of new, complementary DNA. Each new DNA molecule thus contains half of the original molecule.
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