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LuckyWell [14K]
3 years ago
6

What happens during the first step in DNA replication?

Biology
2 answers:
Nina [5.8K]3 years ago
7 0

The first step in DNA replication is the separation of the two DNA strands that make up the helix that is to be copied.

WITCHER [35]3 years ago
3 0

It starts when a protein starts the unwinding of the DNA helix. Next comes the separation of the DNA strands right before the transfer of genetic data to the newly assembled DNA strands starts. A protein known as helicase is what breaks down the hydrogen bonds between strands of DNA during replication.

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Which disorder is a less severe but chronic form of depression?
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Answer:

Persistent depressive disorder.

Persistent depressive disorder, known as dysthymia or low-grade depression, is less severe than major depression but more chronic. It occurs twice as often in women as in men. Persistent depressive disorder (PDD) is a serious and disabling disorder that shares many symptoms with other forms of clinical depression.

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How did wegner use climate evidence to support his hypothesis​
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Explanation:

Wegener used evidence of climate change to support his hypothesis. As a continent moves toward the equator, its climate becomes warmer. As a continent moves toward the poles, its climate becomes colder. But the continent carries with it the fossils and rocks that formed at its previous locations.

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Describe the flow of blood through the heart and around the body?
almond37 [142]
I ts acts as a pump regulator where it has 4 chambers.
keep in mind that out of four two take blood fromm all over the body while two transport ut to other organs through veins and capillaries.
the deoxygenated blood enters the heart through two large veins, the inferior and superior vena cava, emptying oxygen-poor blood from the body into the right atrium.
As the atrium contracts, blood flows from your right atrium into your right ventricle through the open tricuspid valve.
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Left side of the heart:
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As the atrium contracts, blood flows from your left atrium into your left ventricle through the open mitral valve.
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3 0
3 years ago
Under which of the following circumstances would a DNA microarray be useful? Multiple Choice It would enable a researcher to det
diamong [38]

Answer:

The correct answer is ''All of these are circumstances in which a DNA microarray would be useful.''

Explanation:

A DNA microarray is used to determine the complete genetic expression of a tissue at a given time. DNA microarrays is one of the most important applications for the information obtained from the systematic sequencing of complete genomes. They consist of a membrane, which can be made of nylon, silicone or a simple glass slide. The DNA of many genes, arranged according to a specific pattern, is immobilized on this membrane. These DNA fragments, which are known as probes or oligos, are arranged in microscopic spots. Microarray technologies are used in research at the molecular level, they allow the study of simple changes in the DNA sequence and mutations in complex genes that are associated with a specific disease, helping to diagnose diseases.

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