#Question id: 19892
#Unit 12. Applied Biology
#Question id: 5668
#Unit 5. Developmental Biology
Following statements are made in relation to the five widely recognized stages of Arabidopsis embryogenesis:
A. The fusion of haploid egg and sperm takes place in zygotic stage
B. Rapid cell division in two regions on either side of the future shoot apex forms globular stage
C. The cell elongation throughout the embryo axis and further development result in Torpedo stage
D. The embryo loses water and becomes metabolically inactive in the torpedo stage
Which combination of the above statements is correct?
#Question id: 18005
#Unit 9. Diversity of Life Forms
#Question id: 10383
#Unit 6. System Physiology – Plant
The nitrogenase enzyme complex fixes N2 produces ammonia, The nitrogenase
enzyme complex catalyzes this reaction by following characteristics given
below;
a) It can be separated into two components—the Fe protein and the MoFe
protein— neither of which has catalytic activity by itself
b) Fe protein is the smaller of the two components and has two identical
subunits, each contains an iron–sulfur cluster, which participates in the redox
reactions
c) The Fe protein is irreversibly inactivated by O2 while MoFe protein is
activated by O2
d) MoFe protein has four subunits, each subunit has two Mo–Fe–S clusters
e) Ferredoxin serves as an electron donor to the Fe protein, and Fe
protein reduces the MoFe protein without any hydrolysing ATP
f) Only prokaryotes have nitrogenase enzyme
Which of the following characteristics of nitrogenase enzyme complex is incorrect?
#Question id: 4714
#Unit 11. Evolution and Behavior
After the drought of 1977, researchers hypothesized that on the Galápagos Island Daphne Major, medium ground finches with large, deep beaks survived better than those with smaller beaks because they could more easily crack and eat the tough Tribulus cistoides fruits. A tourist company sets up reliable feeding stations with a variety of bird seeds (different types and sizes) so that tourists can get a better look at the finches. Which of these events is now most likely to occur to finch beaks on this island?