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Klio2033 [76]
3 years ago
5

Two natural plant products, vinblastine from the rosy periwinkle and paclitaxel (taxol) from the pacific yew, have been used suc

cessfully in the treatment of a wide range of cancers. these chemicals work by interfering with mitosis but by different methods. vinblastine inhibits mitosis by preventing the assembly of the spindle. paclitaxel promotes microtubule synthesis and binds to the microtubules preventing the depolymerization (disassembly) of the spindle during mitosis. based on your knowledge of mitosis, at what phase do you expect cell division to be interrupted by each of these cancer fighting compounds? explain your answer based on the activities occurring at mitotic stages.
Biology
1 answer:
Ugo [173]3 years ago
6 0
<span>If vinblastine prevents assembly of the spindle, then it interrupts cell division in Profase 1, when the assembly of the spindle begins. Paclitaxel prevents the depolymeritation of the spindle, so it will interrupt cell cycle in Anaphasis, when the dissasembly of spindle takes place.</span>
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Answer:

B) a nonsense mutation; this is because a nonsense mutation results in the change of a regular amino acid codon into a stop codon, which ceases translation. This fits with the problem's description of the protein that causes the symptoms as too short, as translation is the process by which proteins/polypeptides are created. A missense mutation would not be the answer because it still codes for an amino acid, which would not shorten the protein. A duplication of the gene would probably just lengthen the protein or not affect its length at all.

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3 years ago
A dumping site in the small town of Love Canal, New York, was used for the disposal of industrial chemical wastes from 1970-1975
zheka24 [161]

Answer:

There is no control group and variables were not addressed.

Explanation:

In the context, it is given that there is a dumping ground in a small town called Love Canal and harmful chemical waste of industries are dumped there. Lately, it is noticed that there were traces of the toxic substances on the walls of the schools and the hospitals. The hospitals also noticed that during the period of 1970 to 1980, there were increase in the number of the birth defects in the area. The people of the Love Canal has genetic abnormalities and the chemical waste is responsible for it.

Thus it can be concluded that there is a no such any control group in this case. The confounding variables like the comorbidities as well as the family history of the genetic defects were not addressed.

4 0
3 years ago
A cytoskeleton is:_______.
Softa [21]

Answer: e

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1. Prokaryotic cytoplasm lacks certain features of eukaryotic cytoplasm, such as cytoskeleton and cytoplasmic streaming.

2. The cytoskeleton provides support and shape to cell.

3. It help in transporting substances through cell.

4. It help in phagocytosis.

5. It help in cytoplasmic streaming that is movement of eukaryotic cytoplasm from one part of cell to another which help distribute nutrients and move the cell over the surface.

6. The study of the numerous interaction between microbes and host cell cytoskeleton is a very intense area of investigation on virulence mechanism.

7 0
3 years ago
According to the kinetic theory of matter, how many particles that make up a substance are constantly in motion?
Novay_Z [31]

Answer:

D

Explanation:

4 0
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Kitty [74]

Answer:

A eukaryotic plant cell

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This is the answer because eukaryotic plant cell have nuclei which means more than one nucleus.

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3 years ago
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