please help me answer these questions!
Put the following steps of DNA replication in order.
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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
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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?
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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.
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