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Andre45 [30]
3 years ago
7

How do prokaryotes and eukaryotes manage to fit their lengthy DNA inside of cells? Why is this necessary?

Biology
1 answer:
katrin [286]3 years ago
6 0

Answer:

In Eukaryotes, The DNA is so long that it needs to be super coiled to get fit inside the cell.

This process is required in both Eukaryotes and prokayotes. The super coiling and packaging using the DNA binding proteins allows the lengthy molecules to fit inside the cell.

The DNA in the bacterial cell is arranged in several super coiled forms. The over winding of DNA is prevented in bacterial cell by the help of an enzyme known as DNA gyrase which is a type of topoisomerase.

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3 years ago
Can someone please help me I don't understand the and my parents don't under please
bearhunter [10]

432hz x 432hz = 2228

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5 0
3 years ago
Plants maintain higher levels of phytochrome at their growing tips where phytochrome plays important roles in growth responses t
Naddika [18.5K]

Explanation:

Phytochrome is a protein with kinase activity present in plant organisms, whose function is to act as a photoreceptor mainly of red light (600-700nm) and distant red light (700-800nm), thanks to its chromophore. The phytochrome depending on the type of light detected can trigger different responses in the plant, such as flowering, germination, growth as an escape response to the shadow -development of epicotyls at night and cotyledons during the day-, regulation of expression of metabolic activity during day and night (circadian rhythms).

Phytochromes were discovered in the fifties as part of an investigation on the effect of light on the germination of lettuce seeds. It was observed that the seeds that germinated in the dark did not reach 20%; On the contrary, the germination percentage was maximum when the seeds were irradiated with a pulse of red light (R). It was also found that subsequent irradiation with a pulse of distant red light (RL) nullified the inducing effect of red light, preventing germination.

Alternating irradiation with light R and RL (R, R + RL, R + RL + R, R + RL + R + RL, etc.) showed that the last color applied determined the germination of the seeds and that the light red was the stimulating factor of the process and, its inhibitor, the distant red light.

In search of an explanation of such phenomena, the existence of a pigment was proposed, which they called phytochrome, which absorbed the red light. The phytochrome in question, after absorbing red light, became a way capable of absorbing distant red radiation; form that turned to its initial condition after performing said absorption. The hypothesis found experimental support in the early sixties with the purification, from extracts of cereal seedlings, of a protein endowed with the predicted characteristics. Phytochromes are soluble proteins found in the seeds, leaves, stems, roots and other organs of the plant.

Biochemically, phytochrome is a protein with a Bilin chromophore.

6 0
3 years ago
Explicamos los factores que
gladu [14]

Answer:

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Explicación:

La contaminación por quema de combustibles fósiles en vehículos, la deforestación y el uso de químicos en la agricultura son los factores que generan problemas ambientales en nuestra comunidad. La quema de combustibles fósiles en vehículos e industrias libera gas de dióxido de carbono que aumenta la temperatura del área, la tala de árboles para uso doméstico tiene un efecto negativo en el medio ambiente. En nuestra comunidad, los productos químicos se utilizan para obtener una mayor producción que también contaminan los cuerpos de agua y los animales acuáticos afectados.

5 0
3 years ago
According to classification, if two organisms are in the same class, then they must be in the same kingdom and
malfutka [58]
Phylum. The classification system goes: Kingdom, Phylum, Class, Order, Family, Genus, Species. Anything that shares a class also share anything above it. 
4 0
3 years ago
Read 2 more answers
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