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Karo-lina-s [1.5K]
2 years ago
7

Assertion (A): A proton gradient cannot be established in the mitochondria.

Biology
1 answer:
mixas84 [53]2 years ago
5 0

Based on the nature of proton gradient, (A) is false, but (R) is true.

<h3>What is a proton gradient?</h3>

A proton gradient is a gradient that exists due to difference in proton concentration between the inner and outer mitochondrial matrix.

An assertion is a statement or claim stating a given position.

  • Assertion (A): A proton gradient cannot be established in the mitochondria.
  • Reason (R): Hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria.

The assertion, A, is false because a proton gradient is established in the mitochondria due to the function of the proton pump which pumps out protons from the inner mitochondrial matrix to the outer membrane.

The reason, R is true as hydrogen molecules are pumped out of an internal space (the matrix) in the mitochondria by the proton pump.

Therefore, (A) is false, but (R) is true.

Learn  more about proton gradient at: brainly.com/question/1602075

#SPJ1

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The field of psychology is a collection of diverse subfields. Psychologists who conduct ____________ research contribute by expa
serious [3.7K]

Answer:

d. basic; applied

Explanation:

  • The basic research is a type of research that mainly aims to increase the existing base of the scientific knowledge and hence, in the case of psychology the basic research would increase the knowledge about psychology.
  • Therefore, the purpose of basic research is to add up to the knowledge that already exists.
  • The research that is conducted to especially solve certain problems or answer specific questions is called applied research. Its main aim is to find out the solution for a given problem.
  • Therefore, in the case of psychology applied research is conducted to explore practical problems.
8 0
3 years ago
After eating a large meal of pasta, an individual's blood sugar levels are elevated. In response to this, the pancreas secretes
almond37 [142]

Answer:

d) A negative feedback loop

Explanation:

A negative feedback loop counteracts the deviation from homeostasis by generating a required response. The function of the insulin hormone is to lower down the blood glucose level when it raises above the normal range. Insulin triggers the uptake of glucose from the blood by cells. It specifically triggers muscle and liver cells to take up glucose from the blood.

Once the blood glucose level is restored to the normal value, the secretion of insulin stops. Here, a change in normal body condition (raised blood glucose level) was counteracted by the secretion of insulin hormone to restore the homeostasis of blood sugar levels.

5 0
3 years ago
What are frankenfoods? Are Genetically Modefied foods safe?
barxatty [35]

Opponents of GMOs have been unceasing in their campaign to vilify genetically modified foods by describing them as “Frankenfoods,” thus implying they are not natural and are potentially harmful.

“The practice of introducing new DNA and chemicals to seeds or animals (Aqua Advantage has developed a GMO fish) is similar to how Mary Shelly’s Frankenstein created his monster–—through piecing together lots of different organisms,” wrote the Organic Authority on its website—a common allusion in the anti-GMO world. “We all know what happened when the monster turned on Frankenstein, and many critics of genetic engineering have likened the inevitable backlash of GMO technology to the destruction and murderous rampage of Frankenstein’s monster.”

Many anti-GMO articles that warn of the dangers GM crops are often accompanied by an image of a tomato fruit or vegetable with syringes sticking out of them. Very often it is a fruit or vegetable for which there is no current GM equivalent such as a tomato. This depiction is used to reinforce the notion that GM foods are created in laboratories and not by nature and therefore are dangerous to consume.

With the constant barrage of scare-based imagery, it is not surprising that there is widespread public suspicion that GMOs are dangerous to human health. But there is little controversy surrounding GMOs within the scientific community with 88 percent of the members of the American Association for the Advancement of Science believing GMOs are “generally safe.” The safety of GMOs were once again reinforced by the May 2016 report by the U.S. National Academy of Sciences, Engineering and Medicine, which concluded, there was “reasonable evidence that animals were not harmed by eating food derived from genetically engineered crops”, and epidemiological data indicated there was no increase in cancer or other health related problems associated with these crops entering our food supply.

David Zilberman, a professor of agriculture and resource economics at the University of California, Berkley, has noted that Frankenfood was “a terrible word, a stigmatization word, one that’s used to scare people… People are afraid of GMOs for little or no reason. GM is simply a tool. Because it allows us to modify plants with far greater precision and control then before, it will be very valuable.”

The reality is that the vast bulk of the foods we consume whether organic or conventionally grown have had their genetics altered in the field or in a laboratory via a process of selective breeding or advanced biotechnology techniques, and all such foods are safe to eat. The altering of genes in plants is even known to occur naturally as highlighted by the sweet potato.

6 0
2 years ago
Because cell walls consist of a cross-linked network of long filaments embedded in a stiff surrounding material, they can be cal
Contact [7]

According to the research, the correct answer is fiber composites. Because cell walls consist of a cross-linked network of long filaments embedded in a stiff surrounding material, they can be called fiber composites.

<h3>What are cell walls?</h3>

It is a network that covers prokaryotic cells and plant cells that is located outside the plasma membrane, helping to form the structure.

In this sense, since it is made up of a network of carbohydrates, phospholipids and structural proteins, and the different cell types of plants can be identified by their characteristics, they can be called fiber composites.

Therefore, we can conclude that cell walls are a network embedded in a matrix composed of carbohydrates and proteins.

Learn more about cell walls here: brainly.com/question/965751

#SPJ1

8 0
1 year ago
- always expressed when one or two alleles are present
iren [92.7K]

Answer:

A dominant phenotype will be expressed when at least one allele of its associated type is present, whereas a recessive phenotype will only be expressed when both alleles are of its associated type. However, there are exceptions to the way heterozygotes express themselves in the phenotype.

Explanation:

8 0
3 years ago
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