Comp Mol Bio Unit -3

Characters that is similar due to common ancestry

•  (a) Analogus  

• (b) Homologus

•  (c) Analogus 

• (d) Paralogus

------- is common ancestor of all taxa

 

 

 

• (a) Branch 

•  (b) Root 

•  (c)Leaves   

•  (d) Node

. -------- produces numerous most parsimonious trees

 

• a) Maximum parsimony

• b) maximum likelihood

• c) Minimum evolution

• d) none

Helix-turn- Helix motif is an example for protein -------- motif.

  

 

• (a) Sequence 

•   (b)Structural     

•  (c)Primary     

• (d)Alignment

5. Tree obtained as result of cladistic methods are called--------.

• (a) Dendrogram

• (b) Phylogram 

•  (c) Cladogram  

• (d) Histogram

6. Well-conserved regions in multiple sequence alignments:

.

• a) reflect areas of structural importance.

• b) reflect areas of functional importance

• c) reflect areas of both functional and structural importance.

• d) reflect areas likely to be of functional and/or structural importance.

     

Which of the following is false about the ‘loop’ structure in proteins?

• a) They connect helices and sheets

• b) They are more tolerant of mutations

• c) They are more flexible and can adopt multiple conformations

• d) They are never the components of active sites

What is the length of a motif, in terms of amino acids residue?

 

• a) 30- 60

• b) 10- 20

• c) 70- 90

• d) 1- 10

β-pleated sheets are the examples of _________

 

• a) Primary structure

• b) Secondary structure

• c) Tertiary structure

• d) Quaternary structure

Which among the following motifs contain a positively charged ion?

• Leucine zippers

• b) H-T-H motif

• c) Homeobox

• d) Zinc fingers