Llamamos pigmentos respiratorios a un grupo de proteínas que tienen la propiedad de combinarse de forma reversible con oxígeno molecular. Por esa razón, pueden transportar oxígeno, captándolo en un lugar y liberándolo en otro.
Winds near the surface move across the isobars at an angle when the frictional force, pressure gradient force, and apparent Coriolis force are combined.
<h3>What is the motion of horizontal and vertical air in a high-pressure anticyclone and in a low-pressure cyclone?</h3>
Winds near the surface move across the isobars at an angle when the frictional force is combined with the pressure gradient force and the apparent force of the Coriolis effect. Consequently, the air spirals and converges as it advances in the direction of low pressure. A cyclone sometimes referred to as a low-pressure system, is created by this spiraling inward toward a center of low pressure. Convergence is the technical term for this inward spiraling action, which likewise raises the air at the center.
Air spirals downward and outward from an anticyclone, also known as a high-pressure system, in a high-pressure area. Divergence is the name for this spiraling outward motion. Cyclones rotate anticlockwise in the northern hemisphere and clockwise in the southern hemisphere.
Learn more about Coriolis effect here:
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Complete question: <em>"RNA plays important roles in many cellular processes, particularly those associated with protein synthesis: transcription, RNA processing, and translation. Drag the labels to the appropriate bins to identify the step in protein synthesis where each type of RNA first plays a role. If an RNA does not play a role in protein synthesis, drag it to the "not used in protein synthesis" bin.</em>
<em>1. transcription/RNA processing
</em>
<em>2. translation
</em>
<em>3. not used in protein synthesis
</em>
<em>a) snRNA
</em>
<em>b) tRNA
</em>
<em>c) mRNA
</em>
<em>d) RNA primers
</em>
<em>e) pre-mRNA
</em>
<em>f) rRNA</em>
Answer
1. transcription/RNA processing:
<em>a) snRNA</em>
<em>c) mRNA</em>
<em>e) pre-mRNA</em>
2. translation
<em>b) tRNA</em>
<em>f) rRNA</em>
3. not used in protein synthesis
<em>d) RNA primers</em>
Explanation:
There are many RNAs, each in charge of performing a different function.
- preRNA is the precursor of the mature mRNA. These molecules possess long intermediate sequences called introns that do not codify for proteins. It occurs a posttranscriptional modification that eliminates introns and makes the RNA to get mature as mRNA.
- snRNA means <em>"small nuclear RNA"</em>. These are small RNA molecules located in the nucleus and are implicated in the mRNA maturation process. They associate with proteins composing the small nuclear ribonucleoproteins, and their function is to contribute to the initial mARN processing that transcribes from DNA and that must maturate to be exported from the nucleus. These molecules eliminate the introns.
- mRNA means "<em>messenger RNA</em>". These molecules are carriers of the genetic information and are in charge of transporting it from the genome to the ribosomes. They are the mold for the new protein synthesis. Their nucleotide sequence is complementary with the nucleotide sequence of a particular DNA segment.
- rRNA means "<em>ribosomal RNA</em>". They are the principal ribosomal component. Ribosomes are constituted by two subunits. One of them is a big RNA molecule associated with about 20 proteins. The other subunit is composed of three RNA molecules associated with about 50 proteins.
- tRNA means "<em>transference RNA</em>". These molecules are in charge of transferring activated amino acids from the cytosol to the ribosomes where the new protein is being synthesized.
Protein synthesis is initiated when mRNA meets a free ribosome, the primary structure for protein synthesis. Ribosomes can be found in the rough endoplasmic reticulum or floating in the cytosol. They read the mRNA code and add the correct amino acid using transference RNA to build the protein.