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2 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]2 years ago

6 0

Answer:

The proteins are expressed differently in each cell.

Explanation:

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A fertilizer producer finds that it can sell its product at a price of dollars per unit when it produces units of fertilizer. Th

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Answer:

700

Explanation:

If from the question the price per unit of fertilizer, p(x) = 300 - 0.1x

The cost of x units of fertilizer = C(x) = 15000 + 125x + 0.025x^2

And we know that Profit = Revenue - Cost

Revenue for x units of fertilizer R(X) = x*p(x)

= 300x - 0.1x^2

Hence Profit: P(x) = R(x) - C(x)

= [300x - 0.1x^2] - [15000 + 125x + 0.025x^2]

= -0.125x^2 + 175x - 15000

To determine critical values

P'(x) = -0.25x + 175 = 0

Thus x = 175/0.25

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3 years ago

How do sulfur and phosphorus move from the biotic to the abiotic pools during their cycles?

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Decomposers break down the remains of producers and consumers.

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3 years ago

Which of the following is NOT true regarding the sounds associated with the heart? Select one: a. The "lub-dub" sound originates

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Answer:

B) The "lub-dub" sound originates from blood turbulence through the heart.

Explanation:

The systole and diastole in the heart produce the lub and dub sound in the heart.

The systole represents the contraction of both left and right ventricles and pumps the blood to the body and the right ventricle to the lungs. This involves the opening and closing of the valves. The closing of the atrioventricular valves produces lub sound.

At the end of the systole or ventricular contraction or when the blood has been pumped to the aorta and the pulmonary valves then the semilunar valves present in the aorta and pulmonary closes. This produces a sound dub.

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