Because one original strand of the double-stranded helix is found in each daughter molecule, the replication process is called semiconservative.
Replication is the process by which a DNA molecule generates two identical to itself, and is key in cell reproduction.
All cells in the body must have the exact same genome (as in asexual reproductive organisms, which are practically clones of each other) and this is achieved through replication.
The process consists of separating the two strands of DNA, each of which will function as a template to synthesize a new one.
That is, each of the two strands of DNA serves as a template to synthesize a new complementary strand of the template.
In the end, two DNA molecules are formed, each of the two DNA molecules has a new chain and one original strand, this mode of replication is called semi-conservative.
Therefore, we can conclude that because one original strand of the double-stranded helix is found in each daughter molecule, the replication process is called semiconservative.
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<span>Levene is known for his "tetranucleotide hypothesis" (formulated around 1910) which first proposed that DNA was made up of equal amounts of adenine, guanine, cytosine, and thymine.</span>
Answer:
<em>The correct option is B) the birthrate increased</em>
Explanation:
The picture simply shows that after a period of 10 years, the population of the prairie dogs increased.
Carrying capacity can be described as the maximum number of individuals of a species that a particular habitat can hold. As the diagram shows, there are no factors showing that the carrying capacity of the particular habitat has increased. Hence, other statements like statement D is false.
Answer:
1.A single band of intermediate density.
Explanation:
According to semiconservative model of DNA replication, the two strands of one DNA molecule separate at the time of replication and each strand acts a template for a new strand. So, the resulting new DNA molecule has one old strand and one new strand.
Here, the E coli cells were grown originally in 14N medium. So all the DNA molecules had 14N strands. When they were transferred to a 15N medium, only 15N was available then for further replications. In the first round of replication in new medium, all the old 14N strands (14N14N) separated and formed a new strand each using 15N. Hence all the resulting DNA molecules had one 14N strand and one 15N strand (14N15N).
Since 14N is of lighter density and 15N is of heavier density, 14N15N strands will give band of intermediate density. Since after one round of replication all DNA molecules will be 14N15N, there will be only one band of intermediate density.
A hypothesis refers to a suggested illustration for a phenomenon. For a hypothesis to be a scientific hypothesis, there is a need to test it. Upon analysis, a hypothesis can be modified or rejected, but it can never be proved 100 percent accurate.
A hypothesis needs more work by the individual testing it in order to either disprove or confirm it. A working hypothesis refers to a hypothesis, which is tentatively accepted as a foundation for a further research.
