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egoroff_w [7]
1 year ago
9

If the conservative model had been correct, how many generations of bacterial cell division would have had to pass before mesels

on and stahl would have observed evidence of a band in the cscl gradient corresponding to a hybrid dna molecule containing both 14n and 15n?.
Biology
1 answer:
Reil [10]1 year ago
3 0

No generations or hybrid would form before meselson and stahl would have observed evidence of a band in the cscl gradient.

The conservative model predicts that, following a single replication, half of the newly formed DNA double helices will be made entirely of the original, or old, DNA, and the other half will be entirely new. Then, each double helix would be completely replicated during the second round of replication. After that, 25% of the double helices would be all new, and 25% would be entirely old. Thus, the fraction of entirely new DNA double helices would increase with each succeeding round of replication, but the total number of completely unique DNA double helices would remain constant. Therefore, no hybrid DNA molecule containing 14N and 15N is replicated in the conservative model.

To learn more about conservative model. Click, brainly.com/question/14025877

#SPJ4

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There are three checkpoints in the cell cycle what is the role.
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The 3 checkpoints include G1 where the cell growth is checked, G2 where the integrity of the DNA/chromosome is checked, and M where the integrity of the metaphase plate is checked.

<h3>Cell cycle checkpoints</h3>

There are 3 regulatory checkpoints in the life cycle of cells:

  • G1: the size of the cell, the presence of growth factors, and the integrity of the DNA are checked before the cell irreversibly commits to division.
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More on cell cycle checkpoints can be found here: brainly.com/question/2128300

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8 0
3 years ago
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slamgirl [31]

Answer:

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Whereas Osmosis is the movement of solvents rather then the solute, from a solution of lower to a solution of higher concentration with the help of semipermeable membrane.

Explanation:

Diffusion is the movement of substances from area of higher concentration to an area of lower concentration of minerals, which mainly results in animal cells. Whether solute or solvent, diffusion occurs for both. Diffusion does not requires any semi permeable membrane. Diffusion occur in all state of matter, that solid, liquid and gas, whereas osmosis occurs only in liquid state. Osmosis requires semipermeable membrane and rate of which is related to concentration of solute dissolution in solvent medium. Only movement of solvent medium takes place. Classical example of osmosis is exhibited by cell membranes of animal cells. On the other hand diffusion is the spreading of perfume or fragrances to the external air.

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Read 2 more answers
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