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Nesterboy [21]
4 years ago
12

DNA damage checkpoints are crucial for preventing cell proliferation when DNA damage has occurred The role of DNA checkpoint pro

teins in the cell cycle is closely tied to the roles of DNA repair enzymes, although these proteins perform different functions. Which of the following statements is true for DNA checkpoint proteins and not for DNA repair enzymes? A. These proteins remove a single nucleotide of damaged DNA B. These proteins nick the phosphodiester backbone of the damaged DNA. C. These proteins prevent the cell cycle from progressing if damaged DNA is detected D. These proteins remove the region of damaged DNA.
Biology
1 answer:
postnew [5]4 years ago
8 0

Answer:

Letter C

Explanation:

The checkpoint proteins are specialized proteins that act during some specific points in the cell cycle in order to prevent some errors on the genetic material that is being duplicated. If the error is identified the cycle that is being made takes a halt by those checkpoint proteins.

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Crank

Answer:

C. Flagella

Explanation:

Axial filaments are the locomotory organs. They are found in the spirochetes such as Borrelia. Each axial filament is made up of fibrils which are similar to the flagella. These are originated from the periplasmic space of the cell. Periplasmic space is the space between the inner and outer membrane of a cell. It also helps in rotating the cell body. Axial filaments are made up o many endoflagella.  It is a special type of filament that arises from endoflagella. Axial filaments help the cell contraction in forward,  and backward direction like a screw.

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3 years ago
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6 0
3 years ago
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myrzilka [38]

Answer:

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Explanation:

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8 0
3 years ago
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Basile [38]

Answer: D. Secondary

Explanation:

An ecological disturbance is a circumstance caused by an agent that can be of biological or non-biological origin. The agent is capable of bringing negative changes to an ecosystem. Fire is an example of ecological disturbance. In the given situation, the forest burns down the trees are an example of the direct interaction of fire with the trees; therefore, it is a primary disturbance. Nevertheless, this interaction led to the loss of habitat of animals forced to move to other areas as the fire burned the trees. It is called secondary disturbance.

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2 years ago
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3 years ago
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