#Question id: 12326
#Unit 10. Ecological Principles
Please refer to the following art to answer the following question.
According to the Shannon Diversity Index, which block would show the greatest diversity?
#Question id: 21281
#Unit 12. Applied Biology
#Question id: 7283
#Unit 5. Developmental Biology
The Drosophila orthodenticle gene and the vertebrate Otx genes are homologous and provide a good example of the conservation of gene function during evolution. Which of the following statement is correct regarding to the expression of gene expression.
#Question id: 723
#Unit 1. Molecules and their Interaction Relevant to Biology
Common structural elements in proteins such as α-helices or β-sheets are characterized by uniformly repeating, energetically favorable main chain conformations which additionally exhibit a completely saturated hydrogen-bonding network of the main chain NH and CO groups. Although polyproline or polyglycine type II helices (PPII or PGII ) are frequently found in proteins, they are not considered as equivalent secondary structure elements. Which of the following statements are correct about PP and PGs.
A. PGII -like helices form hexagonal bundles which appear to fulfill the criterion of a (largely) saturated hydrogen-bonding network of the main-chain groups
B. main chain NH and CO groups of the central PGII -helix are saturated by either intra- or intermolecular hydrogen-bonds, resulting in a self-contained hydrogen-bonding network
C. The formation of the right-handed PPI helix is possible only with proline residues because of the required cis conformation.
D. PPII helices seem to be stabilized by main chain-water hydrogen bonds (in the absence of main chain- main chain H-bonds), and tend to have a regular pattern of hydrogen bonds with water. After this, it is not surprising, that PPII helices are found mostly on the protein surface.
#Question id: 7314
#Unit 5. Developmental Biology
With reference to
plant flowering pattern; match the terms of Column I with the most appropriate
term of Column II. (Se-Sepal; Ca-Carpel; St-stamen; Pe-Petal)
s.no. |
Homeotic
mutants (Column 1) |
S. No |
Flower
patterning (Column 2) |
A. |
Apetala2
mutant |
I. |
Ca-Ca-Ca-Ca |
B. |
Agamous
/Apetala3 mutant |
II. |
Se-Pe-Pe-Se |
C. |
Agamous
mutant |
III. |
Se-Se-Se-Se |
D. |
Apetala2/Apetala3
mutant |
IV. |
Ca-St-St-Ca |