Lock and key theory states that enzymes have a specific shape that directly correlates to the shape of the substrate.
<h3>What is the lock and key theory of enzymes?</h3>
Enzymes are globular protein that catalyses a biological chemical reaction.
One of the characteristics of enzymes is that they are usually substrate-specific i.e. They bind and act to a particular substrate.
This characteristics is explained by the lock and key theory of enzymes, which states that enzymes have a specific shape that directly correlates to the shape of the substrate.
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Answer:
The modified hemoglobin with free imidazole cannot be expected to show cooperativity in oxygen binding. The movement of iron ion takes place up in the plane of heme when binding of one subunit of hemoglobin takes place with oxygen. One of the iron's and oxygen's axial ligands comprise the proximal histidine's imidazole ring.
With the movement of iron into the hemoglobin ring, the pulling of proximal histidine takes place along with it. Therefore, when binding of oxygen takes place with one subunit, a modification also takes place in the intersubunit associations, this also comprises displacement of the alpha helix. This phenomenon plays an essential role in modifying the hemoglobin's tensed state to the relaxed state. The withdrawal or mutation of the imidazole ring from the histidine residue does not further permit the cooperative binding as it is not associated physically with the alpha-helix.
The correct answer is A.
Animal cells do not have a cell wall.
A cell wall is the rigid, outermost covering of plant cells and is made up of cellulose. It is absent in animal cells. The cell wall is visible under a light microscope.
Animal cells are instead covered by a cell membrane. It is made up of lipids, proteins, and small amounts carbohydrates. It is a thin and delicate structure that can only be seen using an electron microscope.
Answer:
Explanation:
True:
The universe's average temperature and rate of expansion support the idea that it began as one super-dense and hot mass 13.8 billion years ago.
This is true because it is exactly how we know how old the universe is, it is also how we know it began "at a point" or at least that it used to be very dense.
False:
Human life is more valuable than other forms of life on Earth because humans are more intelligent than other organisms.
What this is implying is that somehow we are better than other organisms. There is no evidence that supports this claim.
True:
Ocean tides are caused by the uneven gravitational pulls of the Moon and Sun on different parts of Earth.
This is why there are tides and it has direct evidence.
False:
The opinions of randomly selected participants in a survey prove the idea that global temperatures are not increasing on Earth.
What people think (most of the time) is wrong. People can "know" things but that doesn't mean they are true. this is what neil degras tyson calls a "self truthe". You can't base your claim off of what people claim rather you should do a real scientific experiment.
<u>I hope it helped!!!</u>
<em>Wbob1314</em>
Given what we know about the translation process, we can confirm that the RNA in question that aids in the process of translating a short sequence of RNA into an amino acid is mRNA.
mRNA is referred to as messenger RNA. This RNA molecule acts as just that, a messenger carrying the necessary code to create amino acids and therefore, proteins. This messenger binds itself to <em><u>the </u></em><em><u>ribosomes</u></em><em><u> of a </u></em><em><u>cell</u></em>, which are in charge of reading the code,<em><u> one </u></em><em><u>codon </u></em><em><u>at a time,</u></em> and <u>chaining together the corresponding </u><u>amino acids</u><u>. </u>
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