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den301095 [7]
2 years ago
15

A fragment of a strand of nucleic acid isolated from a silk moth species contains the base sequence CAGACT. The strand must be f

rom
Biology
2 answers:
Anna35 [415]2 years ago
4 0

CAGACT is DNA strand

Mars2501 [29]2 years ago
3 0
If the strand of Nucleic acid does not have a U - it must be DNA. Any sequence with a U is considered to be RNA. Therefore, CAGACT is considered to be a strand of DNA.
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Consider a simplified metabolic model to describe nitrogen metabolism in the body. Nitrogen is ingested in the food (F), a fract
Alik [6]

The given question is incomplete, the complete question is:

Consider a simplified metabolic model to describe nitrogen metabolism in the body. Nitrogen is ingested in the food (F), a fraction of which is actually absorbed (A), the remainder being lost in the feces (W). The absorbed nitrogen is taken up by the muscle to make protein. At small fraction of the stored muscle protein undergoes degradation and the liberated nitrogen (L) is released from the muscle. Of the liberated nitrogen, a fraction is recycled back to the muscle (R), while the rest is lost to excretion (E) in the urine. If the nitrogen ingested in food is 100 g/day, but only 80% of the food is actually absorbed, while the rest goes to waste, what is the amount of nitrogen lost by excretion? Assume steady-state. Of the nitrogen liberated from muscle, 90% is excreted, while the rest is recycled, what fraction of the nitrogen entering the muscle is from the absorbed food? (In other words, what is the ratio A/(A+R)). Again, assume steady-state

Answer:

The amount of nitrogen lost in the process is 20 grams in a day and the fraction of nitrogen entering the muscle is 0.909.

Explanation:

Based on the given question, the amount of nitrogen absorbed is 80 percent of 100 grams, that is,  

100*(80/100) = 80 grams in a day.  

The concentration of nitrogen lost in the process is,  

Nitrogen ingested-nitrogen absorbed = 100-80 = 20 grams in a day.  

Let us assume that all the ingested nitrogen is liberated from the muscle. Therefore, 80 grams of nitrogen is liberated. If 90 percent of the nitrogen liberated from the muscle get excreted, then the value of excreted nitrogen will be,  

90% of 80 grams = 90/100*80 = 72 grams

Now the nitrogen recycled will be,  

Liberated nitrogen - excreted nitrogen = 80-72 = 8 grams

From the absorbed food, the fraction of the nitrogen entering the muscle will be,  

80/(80+8) = 80/88 = 0.909.  

6 0
3 years ago
What component of volcanic eruptions can block sunlight over large areas?
Len [333]

c. sulfur dioxide can block sunlight due to the thickness of the gas.

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Mashcka [7]

Answer:

c

Explanation:

sperm

What are produced in both the male and female reproductive systems in humans?

4 0
2 years ago
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sergejj [24]
A. Nutrients and other materials pass through the cell membrane through the process of diffusion. This allows the cell to perform all the activities it requires for daily maintenance and living. The concentration gradient allows the cell to regulate just how much of a certain material passes through it.
6 0
3 years ago
Read 2 more answers
Which of these describes the most common way that material is added to a continental shelf?
slavikrds [6]
Had to look for the missing options and here is my answer.

The one that gives the best description of the most common way how material is added to the continental shelf is this: "Deposition of continental <span>sediments". This deposition includes biological, physical, and even chemical processes that occurred in a span of time. Hope this helps.</span>
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