无生源说——从非生命中创造出生命——这是第二个障碍。 The basic building blocks of life aren't unique to Earth: amino acids have been found in comets, complex organic molecules in interstellar dust clouds, water in exoplanetary systems. 构成生命的基本要素并非地球独有:在彗星中发现了氨基酸,在星...
RNA can be classified into various types based on the state that it is in. mRNA is the messenger RNA that travels on to the ribosomes in order for protein synthesis to occur. Answer and Explanation:1 RNA is found inside the cytoplasm of a cell. RNA is however, not synthesized in the ...
Why are L-amino acids found only in proteins? How spindle fibers are formed in plants? Describe six organelles that are seen in the cells and explain their functions. Which offspring of a single-celled eukaryote would inherit a mutation acquired by the parent cell?
so hummingbirds meet their needs for protein, amino acids, vitamins, minerals, etc. by preying on insects and spiders, especially when feeding young.Most hummingbirds have bills that are long and straight or nearly so, but in some species the bill shape is adapted for specialized...
But even a starting supply of several tons of, say, amino acids, delivered by meteors or baked into Earths’ crust, wouldn’t be enough to sustain organic chemistry long enough for life to emerge. Whatever amino acids and benzene rings found their way to early Earth from deep space, they...
another damage can be caused by the interaction of original materials with organic acids secreted as metabolic products (oxalate, acetate, succinate, etc.) which promote the oxidation of polymeric chains, catalyzing depolymerization processes. Other types of pigmented metabolites can cause further aestheti...
They suggest that rare species are likely to be functionally dissimilar from abundant ones and therefore are likely to offer complementary, or unique, metabolic pathways to support community function. This high functional diversity of rare species can also be found in macroorganisms, for example, ...
Are amides found in nature? The prevalence of amides can be seen in Nature inproteins, peptides and many amide-bond containing biomoleculesas well as in many synthetic compounds with diverse applications e.g. as pharmaceutically active compounds or synthetic polymers. ...
Where in the cell is messenger RNA found? Where is mRNA found in the cell? What is found in RNA but not DNA? Where can double-stranded RNA genomes be found? What are the four nitrogenous bases found in RNA? What are three sources of double-stranded RNA?
What are proteins? How can the diversity of proteins in living organisms be explained? Proteins are made of building blocks called ___. Amino acids are building blocks of which type of food? How is Protein BAG3 expressed? What other proteins interact with BRCA protein? Where...