Why do eukaryotic cells require mitochondria?

2 answers:

7 0

Eukaryotic cells require mitochondria because the mitochondria is the organelle that converts food (or protein) into energy.

valentinak56 [21]2 years ago

6 0

Eukaryotic cells need Mitochondria to released stored energy for cell activities.

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Dr. Kettlewelll predicted that clean forests would have _____________ colored moths, and polluted forests would have _________ c

Mashcka [7]

Answer:

Kettlewell thought that if natural selection caused the change in the moth population, the following must be true: Heavily polluted forests will have mostly dark peppered moths. Clean forests will have mostly light peppered moths. Dark moths resting on light trees are more likely than light moths to be eaten by birds.

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A process by which large particles may be taken into the cell for food, protection of the body, or for disposing of old or dead

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The answer for the question is true

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With the endosymbiotic hypothesis in mind, what structure within modern-day chloroplasts is likely derived from the cytoplasm of

777dan777 [17]

Inner membrane of the chloroplasts

Explanation:

The present day eukayrotes are all considered to be derived from its original ancestor – the cyanobacteria.

Earlier, photosynthesis by the first photoautotrophs took place utilizing hydrogen sulphide as the electron donor. However, it was later when the cyanobacteria, which were originally residing in the mitochondria of an eukaryotic cell under an endosymbiotic relationship, developed into true chloroplasts, the use of water as electron donor to perform photosynthesis began.

The cyanobacteria were aerobic in nature and required oxygen to survive. They evolved the chloroplasts covered with an external protective membrane and an internal membrane. It is the internal membrane which contains all the necessary organelles or components necessary for photosynthesis like thyllakoids, stroma etc which helped them to utilize water as an electron donor during photosynthesis like all the eukaryotes.

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2 years ago

Dangerous decreases in respiration, heart rate, and body temperature typically begin with a BAC of approximately __________ .

liberstina [14]

Answer: c. 0.15%

Explanation:

The blood alcohol concentration or BAC refers to the percentage of alcohol present in the bloodstream. The value of blood alcohol concentration of 0.15% is very high. It will affect the balance of voluntary muscles, walking and talking will also become difficult. The person will experience a severe increase in the rate of heart, the body temperature will rise, the person will experience irregular breathing and the bladder control will become weak.

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Which of the proposed models for the mechanism of initial transcription suggests that the entire RNA polymerase enzyme moves alo

Degger [83]

Answer:

The right answer is Letter A

Explanation:

The proposed model for the mechanism of initial transcription that suggests the entire RNA polymerase enzyme moves along the DNA is transient-excursion model, and the proposed model that is best supported by experimental findings is scrunching model.

Because RNA polymerase leaves the promoter, translocate a short way along DNA template, synthesizes a short transcript before aborting transcript, releasing the transcript and returning to its original location on promoter. That is the transient-excursion model.

The scrunching model downstream DNA is pulled into the enzyme and has accumulated within the enzyme as single stranded bulges.

Experiments show that scrunching is right, experiments using single molecule analyses that allow the positions of different parts of polymerase to be measured relative to each other and to the template DNA during transcription.

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2 years ago