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zimovet [89]
2 years ago
10

PLEASE! ASAP! 100 POINTS!

Biology
2 answers:
Alex Ar [27]2 years ago
5 0

Answer:

je n'arrive a faire o travail je suis désolée

Ipatiy [6.2K]2 years ago
4 0

Answer:

THis was 2 months ago so dont think you need this

Explanation:

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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
1. Please describe the signal transmission across a myoneural junction that allows the nervous system to move the muscles of a f
SSSSS [86.1K]
1. Action potential reaches the axon terminal and depolarizes it.

2. Depolarization opens voltage-gated calcium channels, enabling influx of Ca into the neuron.

3. Calcium binds to specialized proteins on vesicles (containing pre-made acetylcholine) and triggers them to fuse with the neuron membrane at the synapse.

4. Exocytosis of acetylcholine into the synaptic cleft occurs.

5. Acetylcholine diffuses across the synapse and binds to nicotinic receptors on the end plate of the myocyte.

6. Activated nicotinic receptors, themselves ion channels, cause cation influx into the myocyte and generate an end plate potential. This eventually gives rise to the full depolarization within the myocyte that enables contraction.
6 0
3 years ago
What has resulted in significant climate changes?
Novosadov [1.4K]

Answer:

In colder areas if it becomes warmer and hot which is the weather that area does not normally see then animals that live in this area may die or move locations fast because they are not made to live in hot places. Also nature, for example there are some plants and trees that are made to live in colder weather so when it becomes hot they will die and not grow in this area anymore becuase they cannot just get up and walk away as animals can.

Explanation:

3 0
3 years ago
Identify two earliest inhabitants of Kenya​
schepotkina [342]

Answer:

i hope it helps

mapriend

5 0
3 years ago
In a bacterium cell division takes place when
insens350 [35]
Takes place in <span>two stages</span>
6 0
2 years ago
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