Answer:
D. it is not true reproduction as a host cell is required to build new viruses
Explanation:
Viruses reproduce by using host cells to convert them into that virus. That is how they spread throughout your body.
This can be demonstrated by using an acellular environment to observe the 32P label entering phosphatidylethanolamine (PE) molecules by direct exchange.
Phosphatidylethanolamine (PE) is a major lipid component of cellular membranes in a wide range of organisms.
A scientist proposed that the 32P label was entering PE molecules by direct exchange, this can be proved using acellular environment.
In acellular environment, there aren't any bacterial cells to synthesize new PE. So if the 32P is incorporated into the PE in the acellular environment that means the proposed idea in the question stem is correct.
If no 32P is incorporated into PE in the acellular environment, then that means proposed idea is not correct.
Disclaimer: The question is not completed.
A scientist proposed that the 32P label was entering PE molecules by direct exchange (swapping phosphate groups with those found in solution) and NOT through synthesis of new PE by bacterial cells. What experimental modification can show this is NOT the case?
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Attached are two images concerning DNA.
The first image is a diagram that illustrates the base paring of DNA. First, there is the ribose-phosphate backbone that keeps the DNA together. Then the bases thymine and adenine are joined together by two hydrogen bonds. On the other hand, the bases guanine and cytosine are joined together by three hydrogen bonds.
The second image shows the helical structure of the DNA.
<span>Cells near the tip of a leaf stop dividing and elongating before those near the center and base of the leaf. TRUE. The nearer the cells to the tip, the greater possibility its elongation and division has to stop because of spatial factor.</span>
