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kumpel [21]
3 years ago
10

7. The increased levels of telomerase associated with many tumor cells likely promote cancer by: A) enhancing levels of DNA repa

ir so that cells remain normal and have stable genomes and thus would be able to replicate their DNA and divide more often. B) promoting the efficiency of the spindle-assembly checkpoint. C) reducing the expression of several oncogenes. D) decreasing the number of epigenetic changes that would promote cancer. E) allowing cells to continue to divide when nor
Biology
2 answers:
Lunna [17]3 years ago
8 0

Answer:

The increased levels of telomerase associated with many tumor cells likely promote cancer by E) allowing cells to continue to divide when normally chromosomes should shorten beyond a point where division would be no longer possible

Explanation:

Telomerase is an enzyme that enables cells to stay its genome and be healthy. Increased levels of telomerase allow cells to have more divisions and more mutations, having as a result incomplete information for cells, becoming them cancer cells. When it is possible to inhibit this enzyme, telomers get shorter and cancer cells might die.

Akimi4 [234]3 years ago
7 0

Completed option E

allowing cells to continue to divide when normally chromosomes should shorten beyond a point where division would be no longer possible

Answer:

E

Explanation:

Telemerase  is a reverse transcriptase enzymes that maintains the length of telemoeres. The later is a repetitive nucleotide sequence of a chromosomes that  stabilizes  the end of the chromosomes from deteriorating and possible fusion with adjacent chromosomes.  its length decreases with each cell division, but replenished by enzymes telemerase.

Telomeres undergo  division to protect the removal  of the  gene portion  located ahead of them on the chromosomes.They are protected by protein Shelterin,

In  Cancer cells, telemere length is increased thus cells undergo prolong cell division which leads to multiple cells production.  Therefore if  telomerase concentration is increased, the telomeres will be replenished after each cell division, by this enzyme. its length will increase, and consequently more tumor cells will be produced.

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alexandr402 [8]

Answer:

Genetics

Explanation:

Heredity refers to one's genes

4 0
3 years ago
Karina is looking at a group of cells under the microscope. The organism has many cells, each with a cell wall and green chlorop
son4ous [18]
The answer would be C. Plantae because it has membrane bound organelles and green chloroplasts, as well as containing a nucleus.
8 0
3 years ago
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based on the fluid mosaic model of the cell membrane, which type of molecule can move passively across the membrane, without the
Monica [59]

Answer:

My guess would be H₂O/ water, since osmosis is a form of passive transport and I can't see the model the question references. Gases like O₂/ oxygen, CO₂/ carbon dioxide, and simple sugars like glucose can also pass through a cell membrane with passive transport though.

8 0
3 years ago
An unknown bacterium produces colorless colonies when inoculated onto an EMB plate. Predict what you would see if you inoculated
marshall27 [118]

The EMB (Eosin Methylene Blue) agar is a selective and differential agar medium. It contains sucrose and lactose as fermentable substrates together with Eosin Y and methylene blue dyes which in combination gives the agar its characteristic color when prepared and serves as a pH indicator as well as an inhibitor of growth of Gram-positive bacteria. Hence, it is primarily used to isolate Gram-negative fecal coliforms while some positive fecal coliforms such as Staphylococci are also able to grow.

These coliforms are of two types:

  • Lactose or sucrose fermenting coliforms form metallic sheens on the agar as a result of acid production and the response of the indicator to the increased acidity.
  • Non-lactose/sucrose fermenters are only able to produce acid by protein deamination. Hence they either form colorless or pinkish colonies on the agar

On the other hand, Mannitol salt agar is a selective and differential agar medium that is primarily used to isolate Staphylococcal bacteria. The presence of sodium chloride in the medium makes it a partial or complete inhibitor of other bacteria.

Hence, an unknown bacterium that forms colorless colonies on EMB will either be a non-lactose fermenting, Gram-negative coliform that will hardly grow on Mannitol salt agar, or a Gram-positive fecal Staphylococcus.

Staphylococci bacteria are of two types:

  • Coagulase-positive will form yellow colonies on the Mannitol salt agar.
  • Coagulase-negative will form red colonies on the Mannitol salt agar.

More about isolating media can be found here: https://brainly.in/question/7238948

5 0
3 years ago
When a cold can of soda is insulated, the heat flow into the can on a hot day ____.
maksim [4K]
The word insulate means to protect from heat, cold,...
So when a can is insulated, means that is protected from heat.
So the answer is:
C. stays the same :)))
I hope this is helpful
have a nice day
4 0
3 years ago
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