How do enzymes impact a chemical reaction?

1 answer:

8 0

Enzymes are biological catalysts. Catalysts lower the activation energy for reactions. The lower the activation energy for a reaction, the faster the rate. Thus enzymes speed up reactions by lowering activation energy.

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The portion of the ocean in which these organisms are most likely to be found is the:

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Oceanographers classify marine organisms by separating them into two primary groups: plants and animals. Ocean Plants ... There are two general types of plants found in the ocean, those having roots that are attached to the ocean bottom and those not having roots which simply drift about with the water.

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Which is the correct sequence of polypeptide transport in the secretory pathway?

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Secretory pathway refers to the channel through which the secretory organelles secrete proteins to the extracellular compartment.
The polypeptide transport in the secretory pathway involved the transportation of proteins from the ribosomes to the endoplasmic reticulum and then to the golgi bodies and finally to the plasma membrane.

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Identify two characteristics of the inner layer of the eye

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Retina and start of optic nerve

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What is the role of the grass? primary producer secondary producer primary consumer secondary consumer

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The role of grass is the primary producer because it is the beginning of almost every food chain.

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Why is it important to have MET at the beginning of mRNA?

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The Beginning of mRNA Is Not Translated
Interestingly, not all regions of an mRNA molecule correspond to particular amino acids. In particular, there is an area near the 5' end of the molecule that is known as the untranslated region (UTR) or leader sequence. This portion of mRNA is located between the first nucleotide that is transcribed and the start codon (AUG) of the coding region, and it does not affect the sequence of amino acids in a protein (Figure 3).

So, what is the purpose of the UTR? It turns out that the leader sequence is important because it contains a ribosome-binding site. In bacteria, this site is known as the Shine-Dalgarno box (AGGAGG), after scientists John Shine and Lynn Dalgarno, who first characterized it. A similar site in vertebrates was characterized by Marilyn Kozak and is thus known as the Kozak box. In bacterial mRNA, the 5' UTR is normally short; in human mRNA, the median length of the 5' UTR is about 170 nucleotides. If the leader is long, it may contain regulatory sequences, including binding sites for proteins, that can affect the stability of the mRNA or the efficiency of its translation.

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