7. With respect to interpreting BLAST search results, when you do a BLAST seareh

Question

7. With respect to interpreting BLAST search results, when you do a BLAST seareh BLAST will come back with a result, that includes A. the reference of the search program B. the number of letters in your sequence C. the number of letters in the database D. a graphic representation of the sequence matches E. a list of matches sorted with the best matching sequences shown first F all of the above G. A, C & E only 8- In interpreting BLAST results select the answer below that is false A. IfBLAST returns an E-value that is very small or close to zero, then you probably have a meaningful match that is not due to random chance. B. Since each match therefore contains 2 bits of information (and only 1 is correct out of 4 possibles), then the higher the score, the better is the match. C To interpret the matches, you therefore need to pay attention to whether the E-value is reasonably small D. Two or more sequences may match extremely well but appear to belong to completely different species. E none of the above 9- Select the incorrect statement below about denaturation. A. Denaturation sometimes alters primary structure. B. Denaturation is the loss of organized structure of a globular protein C. Denaturation is not the same as hydrolysis D. Denaturation is the precipitation of proteins with heat causing them to turn "inside out" E. Denaturation disrupts the native conformation of a protein 10- Select the incorrect statement below about denaturation. A. Denaturation refers to the loss of the native conformation or the organized structure of a protein brought about by the effect of certain agents B. Denaturation is associated with changes on the physical and chemical properties of the protein and lost of its biological activity C. Denaturation alters all the levels of protein structure. D. Denaturation breaks up the 3-D shape of the proteir E. Denaturation is a change in the chemical or physical property of a protein. 11-Select the incorrect statement below about denaturation. A. Denaturation may refer to a structural change in macromolecules caused by extreme conditions B. Denaturation includes structural alterations due to destruction of the chemical bonds holding proteins in a three- dimensional form. C. Denaturation differs from hydrolysis in that in hydrolysis the protein is broken down into smaller peptides or amino acids D. Denaturation does not alter primary structure, but only the higher levels of structure of proteins. E. none of the above F. A and DS only

Explanation / Answer

ANS 7) While doing BLAST search BLAST will come back with a result that includes:

F) All of the above

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ANS 8) E) None of the above

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ANS 9) A) Denaturation sometimes alters primary structures

The above statement is FALSE because it  involves the disruption and possible destruction of both the secondary and tertiary structures.

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ANS 10) E) Denaturation is a chane in the chemical or physical property of a protein

The above statement is FALSE because denaturation only changes the structure of protein

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ANS 11) E) None of the above

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