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natima [27]
3 years ago
13

What helix shaped structure tells the cell when to grow and what to do?

Biology
2 answers:
PtichkaEL [24]3 years ago
6 0

<u>Answer</u>:

Deoxyribo Nucleic Acid (DNA) is a helix-shaped structure that tells the cell when to grow and what to do.  

<u>Explanation</u>:

DNA is made up of polynucleotide sequences that code for the information of the synthesis of the particular protein.

These proteins further help the host cells of different organs and tissues to carry out different functions like cell growth, cell division and cell-cell communication. Defects in DNA sequence can also leads to uncontrolled cell division and cell growth leading to tumor formation.

mylen [45]3 years ago
4 0
La estructura se llama Cromosoma.

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Explain why something with only one cell can be considered to be an organism.
IgorC [24]
<span> Organism- an individual form of life that is capable of growing metabolizing nutrients, and usually reproducing. </span>regardless of the organism being unicellular or multicellular.
4 0
3 years ago
Which of the following is not a body segment of the fruit fly embryo?ThoraxAbdomenHeadAntenna
AfilCa [17]

Answer: Antenna

Explanation:

The morphogenesis is a process by which the egg get transformed into a matured adult insect. The egg transform into several transitional stages such as embryo, larva, pupa and finally to adult insect.

The fruit flies undergoes three development stages during morphogenesis  these includes the egg, larvae and pupa. The fruit flies can develop into adult within 1-2 weeks at room temperature. The egg as well as larval stages takes a span of eight days whereas the pupal stage takes six days for development.

The embryo enclosed inside the egg exhibit three important parts the head, thorax and abdomen the antenna is the structure which develop in adult flies.

8 0
3 years ago
Chris has been experiencing trouble with her central vision. Her doctor confirms that Chris’ condition is due to damage to the b
KonstantinChe [14]
Macular Degeneration.
4 0
3 years ago
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
Which cell organelle is the site for photosynthesis? A. chloroplast B. endoplasmic reticulum C. Golgi apparatus D. lysosome
olganol [36]

Answer: Chloroplast

Explanation:

Plants use photosynthesis to make energy for themselves and this process is located in the chloroplast. If you can't remember this, you might remember the name chlorophyll which is the food a plant makes. The prefix is similar as you can see.

8 0
3 years ago
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