All categories

3 years ago

In at least 200 words explain how DNA replicates

2 answers:

5 0

Answer: Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. 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. Several enzymes and proteins then work together to prepare, or prime, the strands for duplication. Finally, a special enzyme called DNA polymerase organizes the assembly of the new DNA strands. The following description of this three-stage process applies generally to all cells, but specific variations within the process may occur depending on organism and cell type.

~i hope this helps :)

dangina [55]3 years ago

3 0

Answer:

QUESTION:

ANSWER:

Replication is the process by which a double-stranded DNA molecule is copied to produce two identical DNA molecules. DNA replication is one of the most basic processes that occurs within a cell. Each time a cell divides, the two resulting daughter cells must contain exactly the same genetic information, or DNA, like the parent cell. To accomplish this, each strand of existing DNA acts as a template for replication.

The initiation of DNA replication occurs in two steps. First, a so-called initiator protein unwinds a short stretch of the DNA double helix. Then, a protein known as helicase attaches to and breaks apart the hydrogen bonds between the bases on the DNA strands, thereby pulling apart the two strands. As the helicase moves along the DNA molecule, it continues breaking these hydrogen bonds and separating the two polynucleotide chains

Meanwhile, as the helicase separates the strands, another enzyme called primase briefly attaches to each strand and assembles a foundation at which replication can begin. This foundation is a short stretch of nucleotides called a primer

After the primer is in place on a single, unwound polynucleotide strand, DNA polymerase wraps itself around that strand, and it attaches new nucleotides to the exposed nitrogenous bases. In this way, the polymerase assembles a new DNA strand on top of the existing one

Explanation:

A lot more than just 200 words sorry.

Hope that this helps you out! :)

If you have any questions please put them in the comment section below this answer.

Have a great rest of your day/night!

Please thank me on my profile if this answer has helped you.

You might be interested in

Which of the following statements are true

bearhunter [10]

Answer:

Calorie is a unit of heat

3 0

3 years ago

Researchers have found that mitochondria and chloroplasts in eukaryotic cells have their own DNA. This DNA is different from the

ikadub [295]

Answer:

B. Early Eukaryotic cells engulfed mitochondria and chloroplasts

Explanation:

Mitochondria and Chloroplast are organelle that are found in cells of higher animals. Chloroplast are found almost exclusively in plants and mitochondria is found in animal cells. The function of these organelles are to produce energy to the cells, and by extension, the organism that they live in.

Unique features of these organelles show that they have their own DNA and divide and multiply on their own. This strongly suggest that they were once free living prokaryotes and were engulfed by larger cells and a symbiotic relationship began.

As time progressed, these prokaryotes did not require all of their genetic information and this was removed from their system. They kept essential genes and regulatory bodies separate that they needed for their maintenance and function that they provide.

8 0

3 years ago

Does the ANIMAL CELL have a CYTOSKELETON? A. Yes B. No

Nezavi [6.7K]

B. No is correct. Only the plant cell has A cytoskeleton.

7 0

3 years ago

Read 2 more answers

Which statement accurately describes an interaction between plants and animals? A. Animals release O2, required for plant surviv

almond37 [142]

The answer is B.

Animals do cellular respiration which requires the intake of oxygen and the output of carbon dioxide. In order for plants to do photosynthesis, they need carbon dioxide to be able to make oxygen for animals to breathe.

8 0

3 years ago

Read 2 more answers

Anaerobes carry on whereas aerobes carry on cellular respiration

Tcecarenko [31]

Answer:

Anaerobes carry on cellular respiration in the absence of oxygen, whereas aerobes carry on cellular respiration in the presence of oxygen.

Explanation:

Many of the cell processes needed need some energy to occur. Cellular respiration is the process by which cells degrade organic compounds and turn them into energy. Cellular respiration follows two ways, which depend on the presence or absence of oxygen, and both of them begin with the process of glycolysis, which occurs in the cytoplasm and does not need oxygen to occur.

Aerobic Respiration

Occurs in the presence of free oxygen.
Series of reactions by which pyruvic acid (product of glycolysis) turns into CO₂ and H₂O, producing many ATP molecules.
Respiration occurs in the mitochondria.
Takes place in two steps or stages: Krebs cycle and electron transporter chain.
Glycolysis and Krebs cycle produce electrons, which then travel along the electron transporter chain while releasing energy, and ATP is produced.

Anaerobic Respiration

Occurs in the absence of free oxygen
Series of reactions by which using pyruvate (product of glycolysis) 2 ATP molecules van be produced.
There are two ways in which anaerobic respiration can be produced: lactic fermentation and alcoholic fermentation.
Lactic fermentation produces lactic acid and 2 ATP
Alcoholic fermentation occurs in two steps, and the final products are ethylic alcohol, 2ATP, and 2 CO₂
The whole anaerobic process occurs outside the mitochondria.

6 0

3 years ago