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LenKa [72]
4 years ago
9

Which statement about the DNA replication process in prokaryotes is true?

Biology
2 answers:
spayn [35]4 years ago
8 0

the answer is definitly D.)

PtichkaEL [24]4 years ago
6 0

The right answer is D.

The origin of replication (also called "ori") is a unique DNA sequence that allows the initiation of replication. It is from this sequence that unidirectional or bidirectional replication begins.

Prokaryotes have a single circular DNA molecule and therefore usually only one origin of replication. Depending on the Archaea species, there may be one or more origins of replication by replicon1. Eukaryotes have multiple origins of replication on each chromosome.

The origin of replication of Escherichia coli is known as oriC and extends over 245 base pairs (bp). It contains upstream of a 13 bp sequence (GATCTNTTNTTTT) repeated three times, and further downstream, four 9 bp (9mer) sequences that are in either orientation. Proteins, called DnaA, will bind to the repeated 9 bp sequences. The DNA will then wrap around the protein complex of DnaA. This conformational change in DNA results in the opening of the DNA double helix at the adenine and thymine-rich 13 bp repeat which allows enzymes and other factors to bind to dissociated strands and start replication.

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butalik [34]
The answer is invasive species.

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<span>After being introduced into the Hawaiian Islands, the cane toads greatly affect local ecosystem. In the new area, they have a few natural predators and are able to spread. If they spread beyond the area they are introduced, they become invasive species which can overgrow native biotopes and are a great threat to the local biodiversity. This could lead to the extinction of some native species.</span>

8 0
3 years ago
Read 2 more answers
How long does it take for a person's cells to all die after clinical death?
Blababa [14]
Clinical death is the medical term for cessation of blood circulation and breathing, the two necessary criteria to sustain human and many other organisms' lives.

It occurs when the heart stops beating in a regular rhythm, a condition called cardiac arrest.


Brain injuries start to accumulate almost immediately after Clinical Death.

Full recovery of the brain after more than 3 minutes of clinical death at normal body temperature is rare.

Usually brain damage or later brain death results after longer intervals of clinical death even if the heart is restarted and blood circulation is successfully restored.
Although loss of function is almost immediate, there is no specific duration of clinical death at which the non-functioning brain clearly dies.






The most vulnerable cells in the brain, CA1 neurons of the hippocampus, are fatally injured by as little as 10 minutes without oxygen.

However, the injured cells do not actually die until hours after resuscitation.

Brain failure after clinical death is now known to be due to a complex series of processes called Reperfusion Iinjury that occur after blood circulation has been restored, especially processes that interfere with blood circulation during the recovery period.

Hope this helps!!!
~Alkka♥


4 0
3 years ago
Put in the correct order. Ejaculation-implantation-birth-fertillisation-ovulation-development.​
Elis [28]

Answer:

Ovulation, ejaculation, implantation, fertillisation, development, birth

Explanation:

6 0
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Georgia [21]
It kills the plant so no mineral salt
5 0
4 years ago
How might a homeothermic species deal with rising global temperatures?
PolarNik [594]

Answer:

The answer is evolve a warmer set point.

Explanation:

Because species with slightly warmer set points will fare better than those wtih average set points.

7 0
3 years ago
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