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3 years ago

Which of the following best describes how a liver cell and skin cell have the exact same DNA

2 answers:

7 0

Though not exact, the statement that best describes how a liver cell and skin cell have the exact same DNA sequence and yet look different and perform different functions is the last one, the DNA is expressed differently, which leads to proteins being "expressed" differently in each cell.

During early embryonic development, the few cells that make up our organism are totipotent in nature. A totipotent cell is one with the capability to produce any tissue in the human body. All the cells that later make up our bodies are derived from these.

This explains that although not all of the DNA sequence is expressed at all times, the DNA is still present in the cell, meaning that option 1 is false. Option 2 is also false due to the fact that although mutations can occur from time to time, they are certainly not a common process nor are they normal. Finally, option 3 is false given that tRNA's only role is to apport the correct amino acid for each sequence.

As development continues, cells specialize into specific tissues. They do this by compressing certain areas of their DNA, making it unreadable and therefore limiting the expression of that area of the genetic code. This causes the proteins that are synthesized to be unique for each type of tissue.

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padilas [110]3 years ago

6 0

Answer:

The proteins are expressed differently in each cell.

Explanation:

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Helga [31]

Answer:

Conduct an experiment.

Explanation:

Any scientific hypothesis or theory requires the proper step and the procedure to explain the particular points about the theory. Any statement made in the science needs the experimental proof.

The scientific experiments includes the different steps used for the validation of any hypothesis. The experiments can explain the main cause of any phenomena and the factors that might affect the experiments. The experimental studies are performed by the scientists.

Thus, the correct answer is option (e).

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3 years ago

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The two routes of transport of substances across the epithelium of the gut are by transcellular method and paracellular method.

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3 years ago

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Which of the following is the best reason that scientific models are used?

Elodia [21]

The correct answer is b. Option a is incorrect because these models can demonstrate scientific theories, but they don't prove scientific theories (you would need experiments for that). Option c is incorrect because the models aren't always representing something abstract (i.e. DNA is very real, just very small). Option d is incorrect because they don't precisely mimic something in nature, but instead help us visualize something in nature that is difficult to see or comprehend.

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3 years ago

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r-ruslan [8.4K]

Answer: The answer is B

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3 years ago