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Vinvika [58]
3 years ago
5

Explain how studying viruses led to the discovery that DNA contains genetic material

Biology
1 answer:
Ainat [17]3 years ago
6 0

Answer:

See below

Explanation:

Hershey and Chase Experiment:

Viruses, such as T2 Bacteriophage infect by injecting their genetic material into a cell. When Hershey and Chase used radioactive isotopes of sulfur (marking proteins) and phosphorous (marking DNA) and saw which was injected into the cell by the T2 Bacteriophage, sulfur was found outside while phosphorous was found inside the cell. That means that DNA was injected into the cell, not proteins. As the genetic material is injected into the cell to hijack it, and as DNA was injected inside while proteins remained outside, DNA is the genetic material.

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Describe the typical principles used to identify topogenic sequences within proteins and how these principles can be used to dev
Sonja [21]

Answer:

Topogenic sequences share a series of structural features, and thereby computational algorithms can be used to predict these protein-membrane segments  

Explanation:

Topogenic sequences are protein segments formed by alpha-helical transmembrane domains, which are required for the insertion of membrane proteins. These domains share a series of well-defined features: they are composed of segments of about 20 hydrophobic amino-acid residues. In consequence, computational algorithms can be designed to identify protein patterns that fulfill these structural requirements (i.e. segments with a length of 20 residues, hydrophobic level, etc). The models assign a similarity threshold (threshold value) that predict if the similarity level of the protein pattern is good enough to detect a topogenic segment.

6 0
3 years ago
many organisms depend on land as a food source. seasons can affect the amount of food that is available to these organisms. how
Amanda [17]
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6 0
3 years ago
A client is admitted with chest pain. a series of diagnostic tests are ordered, and the client undergoes coronary artery bypass
Nonamiya [84]

Answer;

Although the cost of care for this client was greater than the DRG reimbursement amount, the hospital will be reimbursed only at the set fee.

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8 0
3 years ago
HELP!!!
Mashutka [201]

Answer: Classified as a theory.

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3 0
3 years ago
Process of a structure of a specialized cell.
ikadub [295]

Answer:

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Tissues are made up of specialized cells, those tissues make up organs, organs make up system and systems make up bodies.

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3 years ago
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