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WINSTONCH [101]
3 years ago
5

Researchers performed an experiment to investigate DNA replication. First, they synthesized radioactively-labeled nucleotides, w

hich are nucleotides that contain radioactive elements that allow them to be visualized. Then, they inserted the radioactively-labeled nucleotides into a cell. When the cell divided, it incorporated the radioactively-labeled nucleotides into its DNA during DNA replication.
The following image shows the cell's DNA before and after replication. The original DNA strands are shown in blue and the DNA strands with the radioactively-labeled nucleotides are shown in orange.


Which statement is best supported by the results of this experiment?
Biology
2 answers:
Andrej [43]3 years ago
7 0

Answer:

DNA replication is a semiconservative process.

Explanation:

The DNA molecule is made of two chains (or two strands), also called double-stranded (two chains).

There is complementarity of nucleotides or nitrogen bases:

- Thymine with Adenine,

- Guanine with Cytosine.

This DNA molecule is duplicated. For this, locally, we have an opening of these two chains by enzymes. We speak of enzymatic complex. This set of enzymes comes to open both strands of DNA. After opening the two strands, in the nucleus, there are several free nucleotides which bind to the template strand by complementarity.

We had a single molecule of DNA, we then had two. The two chromatids (or the two DNA helices) are therefore sister, because they are strictly identical. We speak of a semi-conservative replication because we keep one of the two matrix strands to copy identically its complementary, thanks to the complementarity of nucleotides or nitrogenous bases.

Reptile [31]3 years ago
7 0

Answer DNA replication is a semiconservative process.

The DNA molecule is made of two chains (or two strands), also called double-stranded (two chains).

There is complementarity of nucleotides or nitrogen bases:

- Thymine with Adenine,

- Guanine with Cytosine.

This DNA molecule is duplicated. For this, locally, we have an opening of these two chains by enzymes. We speak of enzymatic complex. This set of enzymes comes to open both strands of DNA. After opening the two strands, in the nucleus, there are several free nucleotides which bind to the template strand by complementarity.

We had a single molecule of DNA, we then had two. The two chromatids (or the two DNA helices) are therefore sister, because they are strictly identical. We speak of a semi-conservative replication because we keep one of the two matrix strands to copy identically its complementary, thanks to the complementarity of nucleotides or nitrogenous bases.

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What are DNA machines, according to Kraves?
Harrizon [31]

Answer:

they are machines or devices build to find la DNA trace and copy it multiple times.

Explanation:

DNA machines are machines built to find a DNA line and copy it multiple times, so scientists can read, observe, and find information about the DNA strand. For example, DNA machines can determine if someone is related, if someone has cancer, and it can distinguish a person’s ancestry. Mainly this is how forensic science uses to determine when there's a suspect in a crime.

7 0
3 years ago
A bat species (species 1) lives in a city. Another bat species (species 2) established a population in that same city after some
ddd [48]

Answer:

Roosting areas in buildings of any height are the resource partitioning of both bat species.

Explanation:

  • The <em>fundamental niche</em> refers <u>only </u>to <u>physic conditions</u> in which a species can live and survive in the absence of any interaction with other species.
  • The <em>realized niche</em> refers to the <u>restricted conditions</u> in which a species can live and survive as a result of <u>environment physic characteristics</u> and the <u>interaction</u> with other species.
  • <em>Competitive exclusion</em> refers to the <u>exclusion</u> of the inferior competitor by the superior competitor when there is not habitat differentiation, and both species can not share the same niche. In this case, the effective niche of the dominant species completely occupies the fundamental niche of the inferior competitor.
  • Resources partitioning refers to one dominant species monopolizing the resources, and the other inferior species use resources -partially or completely-, migrates or get extinguished.

A way in which species can divide resources is by living in different habitat areas. These species <em>might eat the same food</em>, and <em>can roost in different places</em> within the same habitat. This resource partitioning and differentiation in the function of their physic location allows both species to coexist more effectively.

In the present example, both bat species can coexist in the same city but the weaker bat species (species 1) roost at the top of the shorter buildings while dominant species (species 2) roost at the top of the highest buildings.

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Which statement about entropy is not true
Maurinko [17]

Answer:

c all matter will remain unchanged

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hodyreva [135]

Answer: d or c

Explanation:

im pretty shure.

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How do mutual ism and parasites compare
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Mutualism is when two organisms are involved and they both benefit where as parasites is when two organisms are involved, but one is benefitted while the other is harmed.

-Hope I helped!
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3 years ago
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