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tangare [24]
3 years ago
15

when running a gel you need to have a positive control and negative control. what do these mean and what are they each used for?

Biology
1 answer:
Makovka662 [10]3 years ago
3 0
I believe the positive control receives a treatment with a known response, so that this positive response can be compared to the unknown response of the treatment. This is used in electrophoresis to compare the DNA strands to the DNA standard. The negative control is used when no response is expected, which is also used in the process of electrophoresis. Electrophoresis is a technique used in laboratories  in order to separate macromolecules based on size. It applies a negative charge so proteins move towards a positive charge. It is sued for the analysis of both DNA and RNA. 
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How does an increase in cell volume impact the diffusion of materials through the cytoplasm?
Setler [38]
Increasing the cell's volume would reduce the efficiency of the diffusion of materials through the plasma membrane into the cytoplasm of the cell. 

On the other hand, increase the surface area and decreasing the volume oft the cell would increase the rate of diffusion across the plasma membrane.
4 0
3 years ago
If our visual perception depends only on the feature detectors in the visual cortex, what would we see?
Anika [276]

The sophistication of the visual cortex can be simplified through understanding that the neurons found in this region are distinguished by the kind of stimulus that each detects.

There are three major groups of feature detectors in visual cortex. These includes simple cells, complex cells and hypercomplex cells. The simple cells are the most specific since it responds to the geometric characteristics of the stimulus such as the lines of particular width, orientation, angle and position within the visual field. The complex cells are similar to simple cells. What differentiates one from the other is that they respond to the proper stimulus in any position within the receptive visual field. In addition, some of the complex cells respond to particular lines or edges moving in a specific direction opposite the receptive field. Lastly, the hypercomplex cells are responsive to the specific length of the lines. It is believed that the information from all feature detectors conjoin in to result in the visual stimulation perception.

3 0
3 years ago
Which is a function of a plants leaves?
Over [174]

Answer:

See Below.

Explanation:

The main function of the plants leaves is to create it's own food source via photosynthesis which produces glucose as one of it's products. Transpiration also occurs in the plant leaves where water evaporates out of the leaf increasing the concentration gradient, allowing more water to move up via the xylem via a column of water.

6 0
3 years ago
3. The mechanism in which organisms best suited for their environment survive<br> and reproduce.
lys-0071 [83]

The mechanism in which organisms best suited for their environment survive

and reproduce <u>NATURAL SELECTION.</u>

<u></u>

Explanation:

When individuals in a population compete for resources or live in their environment, the individuals with the slightest advantage over the others have an increased chance of reaching maturity and  reproducing to passing down their genes to the next generations.

Natural selection works on the variations of the population to ‘select’ the best alleles of genes in the population that offer an advantage in ‘survival for the fittest’. This how natural selection fits a population to its environment. The greater the variation within a population, the higher its capacity to adapt to changes in the environment.

Learn More:

For more on natural selection check out;

brainly.com/question/1184863

brainly.com/question/875198

#LearnWithBrainly

5 0
3 years ago
The picture represents a lipid before it undergoes the process of digestion. The chains that are broken during the process of di
Arlecino [84]

Answer:

Fatty acid chains

Explanation:

A Triglyceride molecule is made up of 3 fatty acid chains and 1 glycerol molecule held together by ester bonds.

Digestion of lipids using lipases hydrolysed the ester bonds to release 1 molecule of glycerol and 3 molecules of fatty acid chains.

5 0
3 years ago
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