From what we know, we can confirm that Negative-sense single-stranded RNA viruses are thought to have arisen many times independently because the nucleotide sequences are not related.
<h3>What does this mean?</h3>
Nucleotide sequences are what make up the DNA of humans, or in this case, the RNA of the virus. Just as with humans, these sequences can be used to trace a lineage and see the relationships between the various kinds of viruses. These studies showed that the viruses are not related.
Therefore, since the nucleotide sequences of these viruses did not match, scientists were led to believe that Negative-sense single-stranded RNA viruses have arisen many times independently.
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The best answer would be B
A decline in plasma albumin levels would cause plasma osmotic pressure to decrease.
<h3>What is plasma osmotic pressure?</h3>
Plasma osmotic pressure is a type of pressure in the serum of blood caused by its protein content.
The plasma osmotic pressure is mainly due to the presence of albumin, which is the main constituent of the plasma.
In conclusion, a decline in plasma albumin levels would cause plasma osmotic pressure to decrease.
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Bloom syndrome (BS) is a rare autosomal recessive disorder characterized by growth deficiency, immunodeficiency, genomic instability, and the early development of cancers of many types. BLM, the protein encoded by BLM, the gene mutated in BS, is localized in nuclear foci and absent from BS cells. BLM encodes a DNA helicase, and proteins from three missense alleles lack displacement activity. BLM transfected into BS cells reduces the frequency of sister chromatid exchanges and restores BLM in the nucleus. Missense alleles fail to reduce the sister chromatid exchanges in transfected BS cells or restore the normal nuclear pattern. BLM complements a phenotype of a Saccharomyces cerevisiae sgs1 top3 strain, and the missense alleles do not. This work demonstrates the importance of the enzymatic activity of BLM for its function and nuclear localization pattern.
<u><em>What DNA sequence were the researchers trying to detect? </em></u>
<u><em>Are you referring to the choices below?</em></u>
Hairpin like structures are formed in both DNA and RNA but are common in RNA than in DNA. This is because DNA can be double stranded or single stranded while RNA is generally single stranded structure that can be double stranded only when it forms a hair pin like structure.
The features of hairpin structure in RNA are as follows:
1. This structure is a building block of many secondary structures of RNA.
2. The termination sequence during transcription also forms a hairpin loop like structure.
3. tRNA also forms a hairpin loop like structure and helps in the process of translation.