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This section includes 6 Mcqs, each offering curated multiple-choice questions to sharpen your Bioinformatics knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
In Jukes Cantor Model to correct evolutionary distances, A formula for deriving evolutionary distances that include hidden changes is introduced by using a logarithmic function. It is ____ |
| A. | d<sub>AB</sub> = (3/4) log[1 (4/7)p<sub>AB</sub>] |
| B. | d<sub>AB</sub> = (3/4) ln[1 (5/3)p<sub>AB</sub>] |
| C. | d<sub>AB</sub> = (3/4) log[1 (4/3)<sub>pAB</sub>] |
| D. | d<sub>AB</sub> = (3/4) ln[1 (4/3)<sub>pAB</sub>] |
| Answer» E. | |
| 2. |
DNA sequences are sometimes more biased than protein sequences because of preferential codon usage in different organisms. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 3. |
Protein sequences can remain the same while the corresponding DNA sequences have more room for variation. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 4. |
In many cases ______ sequences are preferable to ______ sequences because they are relatively ____ conserved. |
| A. | protein, nucleotide, less |
| B. | nucleotide, protein, less |
| C. | protein, nucleotide, more |
| D. | nucleotide, protein, more |
| Answer» D. nucleotide, protein, more | |
| 5. |
For studying the evolution of ________ divergent groups of organisms, one may choose either ______ nucleotide sequences, such as ribosomal RNA or protein sequences. |
| A. | less widely, slowly evolving |
| B. | more widely, slowly evolving |
| C. | more widely, rapidly evolving |
| D. | less widely, rapidly evolving |
| Answer» C. more widely, rapidly evolving | |
| 6. |
Which of the following is an incorrect statement about Newick Format? |
| A. | It was designed to provide information of tree topology to computer programs without having to draw the tree itself |
| B. | In this format, trees are represented by taxa excluded in nested parentheses |
| C. | In this linear representation, each internal node is represented by a pair of parentheses |
| D. | For a tree with scaled branch lengths, the branch lengths in arbitrary units are placed immediately after the name of the taxon separated by a colon |
| Answer» C. In this linear representation, each internal node is represented by a pair of parentheses | |