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Whitepunk [10]
2 years ago
15

Upon examination, a cell is found to have twice as much DNA as the normal diploid state but is no longer in the process of repli

cating the DNA. All of the DNA is found within a single nucleus. Which stage of the cell cycle is this cell in?
Biology
1 answer:
irina1246 [14]2 years ago
6 0

The Gap 2(G2) stage of Interphase

Explanation:

In a eukaryotic cell, the cell cycle refers to both -cell growth and cell division - leading to the production of identical daughter cells. The cell cycle is basically divided into interphase (I) and mitosis (M).

The interphase, during which the cell grows and replicates its DNA takes place by the following stages – Gap 1 (G1), Synthesis (S), Gap 2(G2).

The cells grow and increase in size during the G1 period.

The G2 phase or the second gap phase the cell utilizes energy and produces necessary proteins for undergoing chromosome manipulation and other organelles and prepares the cell for mitotic cell division.

DNA replication mainly takes place in the Synthesis or the S stage of interphase with each of the chromosomes (46) is replicated.  

Due to this DNA replication in the S stage, its content is doubled (4-N DNA content) when it enters the G2 stage and all the DNA is found within a single nucleus.

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Consider a series of metabolic events during fasting. Within a few days after a fast begins, nitrogen excretion accelerates to a
timurjin [86]

Answer:

A series of events occur, in prolonged fasting; the body undergoes changes and adaptations of its metabolism to continue to meet energy needs and maintain vital functions, despite not receiving food

These changes are divided into three phases according to the elapsed days of fasting and according to the metabolic processes involved.

First phase: main consumption of reserve carbohydrates.

Second phase: main consumption of fats.

Third phase: serious consumption of proteins.

Explanation:

If the fast is prolonged in time, the metabolic processes change in their qualitative and quantitative characteristics, so that the energy products consumed (glucose, free fatty acids and ketone bodies) are modified, their oxidation decreases globally and after the initial depletion of hepatic and muscular glycogen and protein catabolism, the main source of glucose is the liver through gluconeogenesis. The substrates initially come from protein catabolism and lipolysis, but later protein destruction slows down, maximizing lipolysis.

Between the first phase and the second phase of the fast some muscle proteins are lost but not excessively, even with fasts of two or three weeks.

After about 2 weeks of fasting, up to two-thirds of the energy the brain needs is obtained from ketone bodies. These ketone bodies are the breakdown products of fats and are responsible for the typical ketone breath reminiscent of the smell of acid apples; urine also smells like ketone.

In this phase, damage begins to occur in some important organs such as the liver and kidneys. Starting the first week of fasting, acidosis affects the heart's function of the circulation and the brain.

In the third phase of the prolonged fast it happens from 3 weeks, that is, about twenty days without food, although it varies according to the constitution of each person. A peak of muscle protein consumption occurs and a great loss of weight begins to be perceived with great weakness. Edema occurs and albumin concentration in the blood is altered, as a sign of the self-digestion of muscle proteins.

From approximately 30 days of fasting, the state of malnutrition severely affects all body systems. After forty or fifty days the deterioration is noticeable due to physical wear, the person loses his mobility and suffers from unconsciousness. Finally, starvation death can occur from cardiorespiratory arrest or from lack of blood supply to the brain.

7 0
3 years ago
Read 2 more answers
According to Piaget, children have acquired the cognitive skill of conservation when they're able to
Solnce55 [7]

Answer:

The right answer is D: realize that the term heavy describes an object one way and the term big describes it another way.

Explanation:

The studies of Piaget suggested that when a child is born, his brain if of a very basic kind of structure. He did not agree with the idea that intelligence is a pre-determined trait and in contrast he said that during the process of child's growth and development, when the interaction with environment occurs, his cognitive abilities also grow.

When the child is able to realize that term heavy describes an object one way and the term big describes it another way, that is the point when , children have acquired the cognitive skill of conservation.

Hope it help!


3 0
3 years ago
Why Do many scientist think that prokaryotes are similar to the first organisms on the earth?
Vilka [71]

Explanation:

Between prokaryotes and eukaryotes, which type of cells are believed to have evolved first? Scientists have concluded that prokaryote life forms preceded the more complex eukaryotes. All organisms on Earth are classified into two basic cell types. Kary means nucleus.

3 0
2 years ago
Read 2 more answers
Part 4 - Natural Selection and Adaptations
levacccp [35]

Answer:

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4 0
2 years ago
Which of these pollutants is biodegradable?
vfiekz [6]

Answer:

Food waste

Explanation:

Food waste is an organic compound, unlike the other choices. Organic compounds are biodegradable because living organisms, such as decomposers, have evolved mechanisms of breaking down these large carbon-based compounds/polymers into smaller molecules for energy. Food waste is therefore easily recycled into the environment.

The others do not have naturally occurring organisms to break them down or reduce them. They would, therefore, accumulate in the environment. This is exactly what is happening to plastc pollution. Accumulation of plastic in the environment is due to fact that they are not broken down into simpler molecules by any naturally occurring bacteria or organisms in the environment.

7 0
3 years ago
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