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Cloud [144]
3 years ago
7

What are the two main functions of DNA​

Biology
2 answers:
Vinvika [58]3 years ago
6 0

The two main functions of DNA are to store and use information to direct cell activities and copy itself exactly for new cells

Explanation:

erik [133]3 years ago
5 0
DNA is used to store genetic information

DNA gives us specific identity different from anyone else on this planet
You might be interested in
Which of the following groups of animals has the most efficient gas exchange?
Lana71 [14]

Answer:

birds

Explanation:

I found a quizlet online with the answer:^

4 0
3 years ago
In the ocean, plants and other photosynthetic organisms take in carbon. This carbon is transferred through the food web into the
musickatia [10]

Answer:

C.  Oceans are carbon sinks because they store more carbon than they emit.

Explanation:

Oceans are carbon sinks because they store more carbon than they emit. Most of the carbon is produced in the respiration process as well as burning of fossil fuels. This carbon moves to the atmosphere and dissolved into the ocean which is required by the vegetation of ocean. Due to this carbon, vegetation produced more food for the organisms. About 25% of all CO2 emissions are absorbed by the ocean. Source is the part of a plant where materials are produced e.g. leaves whereas Sink refers to the part of the plant where the substrate can be stored e.g. roots or stem for starch.

6 0
2 years ago
Como podemos trasladar una caja de 50 kg desde planta baja hata un primer piso que presenta una inclinacion de 40º que tipo de m
avanturin [10]

Answer:

Explanation:

We can easily move the box from a ground floor though to the first floor at an angle of 40° to the horizontal by simply pushing the load through an inclined plane. We will simply be lean the inclined plane on the building at the required angle and the push through the the height of the building.

Based on the explanation above, the best type of simple machine to use is an INCLINED PLANE. <em>Note that the essence of using a machine is simply to make our work easier and faster and also be able to overcome a much larger load with a minimal effort. </em>

4 0
3 years ago
(04.04 LC)
podryga [215]

Answer:

A) The production of energy without the presence of oxygen  - Anaerobic respiration

B) The chemical breakdown of a substance  - Fermentation

C) The breakdown of food to create energy in the presence of oxygen  - Aerobic respiration

D) An organic molecule that occurs as an intermediate in many metabolic processes - Pyruvate

Explanation:

A) Anaerobic respiration is a type of cellular energy production that occurs in the absence of oxygen. it is much less efficient than aerobic respiration (see question C). In cellular respiration, cells produce ATP, which is the "currency" of energy in the cell, by breaking down glucose. ATP is required to carry out the normal functions of a cell.

As it is much less efficient than aerobic respiration, it produces much less ATP. However, when there is no oxygen, it is the only choice. An example is when muscle cells are working very hard and use up all the oxygen in the tissue. To keep producing some energy, they undergo anaerobic respiration, which only produces 2 molecules of ATP for every molecule of glucose.

B) In respiration, Fermentation is a pathway of breaking down glucose into chemical energy that occurs in the absence of oxygen. Anaerobic respiration can lead to two types of fermentation, lactic acid fermentation (described above) and ethanol fermentation which is another type of anaerobic respiration in which fungi (such as yeast) break down glucose into ethanol, producing 2 molecules of ATP carbon dioxide as a by-product. This is how we make bread and beer!

C) Aerobic respiration is cellular respiration in the presence of oxygen. It creates a net gain of 36 molecules of ATP, compared to the 2 ATPs created without oxygen. This is because in aerobic respiration, the oxygen acts as a final electron acceptor for the electron transport chain. In its absence the electron transport chain cannot proceed. The electron transport chain is how cells generate most of their chemical energy.

D) Pyruvate is an important molecule in the process of respiration. Both aerobic and anaerobic respiration begin with the same process, glycolysis. Glycolysis is the process by which 1 molecule of glucose is broken down into two molecules of pyruvate - a metabolic intermediate. This releases 2 molecules of ATP. In the presence of oxygen, pyruvate is oxidised and enters the Krebs cycle, which makes a series of compounds that donate electrons to the electron transport chain, which produces extra ATPs through oxidative phosphorylation.

In the absence of oxygen, pyruvate is converted either to lactic acid or ethanol by fermentation

5 0
3 years ago
What would happen to a flower if it had dark petals or no petals at all?
nadya68 [22]

Answer:

it might catch to much sun with black petals or no sun at all with none so in other words it  would probably die.

Explanation:

white reflects heat, black attracts heat

4 0
3 years ago
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