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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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How many dna molecules are present in a synapsed pair of homologous chromosomes?
uranmaximum [27]

Answer:

The answer is 4

Explanation:

The answer is 4 because we are talking about pairs of homologous chromosomes and there  two copies  are held together and they are located in the centromere.

Synapsis is two homologous chromosomes pairing. During the event of <em>meiosis </em>homologous chromosomes are being pared but then also separated because of reducing the genetic content of the resulting haploid cells.

7 0
3 years ago
Which event might cause the carrying capacity of a population to change?
tamaranim1 [39]

Answer:

Carrying capacity can be described as the maximum number of population of a species that a particular habitat can hold.

There are a number of events which effect the carrying capacity like:

  • Environmental changes:

Environmental changes like weather conditions might become favorable for a species in a habitat. It might be that a certain weather condition raises more food for a species. Hence, the carrying capacity would increase.

It might be conditions like drought make the availability of nutrients scarce for a population of species. In this case, the carrying capacity of the ecosystem would decrease.

  • Other organisms :

It might happen that other species might come to live in the particular area. That species will deplete the availability of resources and cause the carrying capacity to decrease.

  • Water supply:

If adequate amount of rain fall occurs in an area, it might cause the carrying capacity of a species to increase as there will be more water. But if the water supply becomes scarce, the carrying capacity would decrease.

6 0
3 years ago
The most common usable form of energy in a cell is
vlada-n [284]

Answer:

ATP

Explanation:

Adenosine triphosphate, or ATP, is the primary carrier of energy in cells

4 0
2 years ago
I need help please ​
Temka [501]

Answer:

75 percent, 25 percent

Explanation:

5 0
3 years ago
If color blindness is an X-linked recessive trait, what genotype in a father and a mother would be predicted to produce a 1:1 ra
Likurg_2 [28]
The genotype would be X'Y for the father (he would be colorblind)
The genotype would be X'X for the mother (she would be a carrier)
The offspring would be X'X' _ X'X_ X'Y_ XY
The ratio would be 1:1 normal to colorblind
Hope this was helpful(;
3 0
3 years ago
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