11th Hour: Introduction to Molecular Biology by Deanna Raineri

Molecular Biology

By Deanna Raineri

The eleventh Hour sequence is designed for use while a textbook doesn''t make experience, while the path content material is difficult, or for those who simply desire a higher grade within the path. The authors reduce during the fluff, get to what you must understand, after which assist you know it.

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11th Hour: Introduction to Molecular Biology

The eleventh Hour sequence is designed for use whilst a textbook doesn''t make feel, while the path content material is hard, or if you simply need a greater grade within the direction. The authors lower throughout the fluff, get to what you want to understand, after which assist you are aware of it. scientific correlations or daily purposes comprise examples from the genuine global to assist scholars comprehend key suggestions extra with no trouble.

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SOME RNA MOLECULES HAVE ENZYMATIC ACTIVITY Some RNA molecules alone can catalyze particular reactions. These recently discovered catalytic RNAs are referred to as ribozYIlles. For example, RNase P is a widely occurring RNA molecule that acts as an endonuclease that processes primary tRNA transcripts, and yet another catalytic RNA molecule, discovered in Tetrahymena, removes intron sequences from primary rRNA transcripts. The removal of noncoding sequences by catalytic RNA molecules is referred to as self-splicing because it occurs in the absence of protein.

This would in turn cause the translational apparatus to assume that the intron was intended to be part of the protein, leading to a larger and (most likely) nonfunctional protein. We now know that some internal intron sequences are translated. However, intron sequences that are translated are very rare and are not covered in this review. Check Your Performance From DNA to RNA: The Process of Transcription The Central Dogma Questions: 1, 11 Copying DNA Into RNA Questions: 2, 3, 4, 5, 6, 7, 8, 9, 10 RNA Processing Questions: 12, 13 Note the number of questions in each grouping that you got wrong on the chapter test.

D 8. e 9. In bacteria, transcription termination occurs in one of two ways. In intrinsic or rhodependent termination, the RNA polymerase recognizes a specific termination sequence in the DNA that signals the end of transcription. In rho-dependent termination, a special termination protein recognizes the termination sequence and causes the RNA polymerase to be released from the DNA template. 10. a. Multiple RNA polymerases; b. noncoding sequences within and between genes; c. compartmentalized transcription and translation.

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