A general theory for modeling strings of symbols, such as bases in DNA sequences

Question

A general theory for modeling strings of symbols, such as bases in DNA sequences, has been developed by linguists. There is a hierarchy of these so-called transformational grammars that deal with situations of increasing complexity.

Options:

A . True

B . False

C . May be True or False

D . Can't say

Answer: Option A
Answer: (a).True

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Question 1. In a SCFG, each production of a non-terminal symbol has an associated probability for giving rise to the resulting produ....are a set of productions, each giving a different result.

Question 2. The application of SCFGs to RNA secondary structure analysis is very similar in form to the probabilistic covariance mod....is very similar in form to the probabilistic covariance models.

Question 3. ______ regions in sequences, such as those in RNA that will form secondary structures, are an example of such context-fr....form secondary structures, are an example of such context-free sequences.

Question 4. The use of SCFGs in RNA secondary structure production analysis is in fact very similar to that of the covariance model,....grammatical productions resembling the nodes in the ordered binary tree.

Question 5. One of the first methods used to find tRNA genes was to search for sequences that are complementary and can fold into a ....fold into a knot like the three found in tRNAs.

Question 6. ______ molecules can simply be identified based on their sequence similarity with already-known sequences.....

Question 7. Fichant and Burks (1991) described a program, tRNAscan, that searches a genomic sequence with a sliding window searching....conserved self-complementary regions in tRNAs with an accuracy of 97.5%.

Question 8. The probabilistic model was used to identify small nucleolar (sno) RNAs in the yeast genome that methylate ribosomal RNA....(sno) RNAs in the yeast genome that methylate ribosomal RNA.

Question 9. The probability model mentioned above was a hybrid combination of HMMs and SCFGs trained on sno RNAs.....

Question 10. Base pairing, in RNA, is A–G and U–C.....

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