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3 years ago

Which of these requires a host cell to copy its genetic material and protein coat?

Biology

2 answers:

alex41 [277]3 years ago

4 0

Answer: A) Virus

Explanation:

A virus is an infectious agent with its genome is uncoated from the protein and injected into the host cell. This means they can only replicate within a host organism, literally taking over the host's functions. Then the viral genome hijacks the host cell's machinery, and to produce viral proteins, it forces the cell to replicate the viral genome. So, viruses depend on the host cells that they infect to reproduce.

B) is a plant cell and D) is an animal cell. They are both structural and functional unit of all living organisms, they do not need another cell to copy its genetic material. And C) is a bacteria, which reproduces by binary fission. In this process the bacterium divides into two identical daughter cells, and the DNA of the bacterium divides into two. So none of them needs a host cell to copy its genetic material and protein coat.

svet-max [94.6K]3 years ago

3 0

The virus' DNA becomes a part of the host cell's DNA, and every time the host cell copies and divides, it also copies viral DNA. The viral DNA may remain inactive (a provirus) for a long time, but it can become active when it frees itself from the host's chromosome, which triggers the lytic cycle.

I forget which one is the virus' DNA

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Translate:

Las proteínas de membrana se pueden clasificar en dos categorías amplias: integrales (intrínsecas) y periféricas (extrínsecas), según la naturaleza de las interacciones membrana-proteína (véase la figura 3-32). La mayoría de las biomembranas contienen ambos tipos de proteínas de membrana.

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2 years ago

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3 years ago

Five dialysis bags constructed of membrane, which is permeable to water and impermeable to sucrose, were filled with various con

Gekata [30.6K]

Answer:

The options

A. A

B. B

C. C

D. E

The CORRECT ANSWER IS D.

Explanation:

It is a regular occurrence for dialysis bags or dialysis tubing to be employed in permitting smooth movement of molecules when having to do with a fluid. These bags are normally evaluated to ensure that the client has adequate amount in th bag so as to be able to achieve the goal at hand.

If we have five dialysis bags being formed from a semi-permeable membrane which is impermeable to sucrose, they may be saturated with different concentrations of the sucrose with each of these bags being positioned in different beakers that have an initial amount of 0.6 M of a sucrose solution.

At ten minute intervals, the bags were massed and the weight was calculated to look for changes in the level of concentration. In this situation, the bag with the lowest initial concentration of sucrose is be the one that has its mass reducing over time and that is E.

The attached image confirms our answer as from the graph, option E shows the lowest initial concentration of sucrose.

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3 years ago

What two types of molecules move through a cell membrane Using a channel protein?

Helga [31]

Answer:

polar and ionic molecules

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3 years ago