Explain why the genetic code is called a triplet code

1 answer:

6 0

The genetic code is broken down into a series of codons on the mRNA. Each codon consists of 3 nucleotides which (normally) correspond to a single amino acid (e.g. AUG codes for methionine). I say normally because you can also have a codon indicate a stop codon (so no amino acid will be inserted and instead the polypeptide chain will terminate). This mRNA molecule with its list of codons will instruct a ribosome to synthesize a protein according to this code.

This code is the set of rules - based on the triplet or codon. This triplet code is universal - all organisms use the same codons to specify the placement of each of the 20 amino acids in a protein.

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Which of the following is not true of the carrier molecules involved in facilitated diffusion?

PtichkaEL [24]

Carrier proteins are involved in passive transport, moving solute molecules form one side of the membrane to the other. Option (A) is not true. <em>They increase the </em><em>speed of transport</em><em> across the membrane. </em>

<h3>Facilitated diffusion </h3><h3 />

It is the transport of hydrophilic molecules that can not freely cross the membrane.

Channel protein and many carrier proteins are in charge of this transport.

When uncharged molecules cross the membrane, they do it according to their concentration gradients, going from the more concentrated side to the lower concentrated one.

When ions need to cross the membrane, the process depends on an electrochemical gradient

<h3>Carrier molecules</h3><h3> </h3>

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They do not need energy. They move solutes according to the electrochemical gradient.

The carrier proteins have specific binding sites recognized by the transported molecules.

When the proteins and the solutes get together, the carrier proteins suffer a temporal change in their structure.

These changes allow the solute passage to the other side of the membrane.

Options,

(A) They increase the speed of transport across the membrane. FALSE

(B) They concentrate solute molecules on one side of the membrane TRUE

(D) They undergo conformational changes upon binding the solutes. TRUE

The incorrect option about carrier proteins is A. <em>Carrier proteins </em><em>Do Not increase</em><em> the </em><em>speed</em><em> of </em><em>transport</em><em>. They just make it possible. </em>

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<em>You can learn more about </em><em>carrier proteins</em><em> at</em>

<em>brainly.com/question/241437</em>

<em>brainly.com/question/21036213</em>

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