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defon
3 years ago
12

The unwinding of the dna double helix is accomplished with a variety of nuclear enzymes called:

Biology
1 answer:
tester [92]3 years ago
5 0
The answer is DNA Helicases
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Crossing over occurs during which phase of meiosis
grandymaker [24]

prophase

Further genetic variation comes from crossing over, which may occur during prophase I of meiosis. In prophase I of meiosis, the replicated homologous pair of chromosomes comes together in the process called synapsis, and sections of the chromosomes are exchanged.

Hope it helps!

4 0
3 years ago
You are performing a biochemical purification of enzymes involved in DNA replication. You have purified the replisome. You wish
algol [13]

Confirm that the sample has both helicase and primase activities, but not the ability to synthesize DNA

  • The replisome is a multiprotein-RNA complex that is required for the replication of DNA. The replisome consists of different proteins which include:

            1. Helicase enzymes that unwind and separate the DNA strand

            2. Replication factor C (RFC), a DNA-dependent ATP that acts as an activator of DNA polymerase.

           3. Proliferating cell nuclear antigen (PCNA)

           4. DNA gyrase/topoisomerase that cuts and reseals DNA strands, which is essential for DNA synthesis.

           5. Primase enzyme that synthesizes short RNA fragments called primers.

          6. DNA polymerase III, an enzyme that catalyzes the polymerization of deoxyribonucleotides into a DNA strand.

           7. DNA ligases enzymes that form phosphodiester bonds at a single-strand break in DNA

  • A primosome is a multiprotein complex responsible for creating RNA primers on single-stranded DNA (ssDNA) during the replication process.
  • The primosome is composed of different primase and helicase enzymes. In<em> Escherichia coli</em>, it consists of PriA helicase, PriB, PriC, DnaB helicase, DnaG (encoded by the dnaG gene), DnaC and DnaT primase.

Learn more in:

brainly.com/question/14674568?referrer=searchResults

6 0
3 years ago
The hydrolysis of atp on the na+/ k+ pump results in
Shalnov [3]
I believe it results to a conformation change that moves the Na+ binding site to the inside of the cell. ATP hydrolysis involves the release of chemical energy that has been stored in the high-energy phosphoanhydride bonds in adenosine triphosphate.For example in muscles. The process of moving sodium and potassium ions across the cell membrane is an active transport process involving the hydrolysis of ATP to provide the necessary energy. It involves an enzyme referred to as Na+/K+ ATPase.
4 0
3 years ago
What is the name of the structure labeled C in the diagram below?
elena-s [515]

Answer:

it is a cell membrane (d)

Hope this helps!!!

3 0
2 years ago
Is coffin Lowry syndrome more common in males or females? why or why not?
tiny-mole [99]
1). Thus, the syndrome is typically more severe in males because males have only one X chromosome, while females have two. It is unclear how changes (mutations) in the DNA structure of the gene lead to the clinical findings. There is no cure and no standard course of treatment for Coffin-Lowry syndrome.
4 0
3 years ago
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