#Question id: 10380
#Unit 6. System Physiology – Plant
Two separate processes, the first involves a signaling pathway that facilitates the infection process itself and the second involves the activation of a set of genes that regulate the formation of root nodules. Which of the following receptor is thought to participate in both processes?
#Question id: 19099
#Unit 6. System Physiology – Plant
#Question id: 7175
#Unit 5. Developmental Biology
The primitive streak is derived from epiblast cells and the central cells of Koller’s sickle. As the primitive streak extends rostrally, Henson’s node is formed. Following are few statements regarding this:
A. As endodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the center of the area pellucida to a more posterior position.
B. As endodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the periphery of the area pellucida to a more posterior position.
C. As mesodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the center of the area pellucida to a more posterior position.
D. As mesodermal ingression continues, the primitive streak starts to regress, moving Henson’s node from near the periphery of the area pellucida to a more anterior position.
Which of the following statements are correct?
#Question id: 7111
#Unit 5. Developmental Biology
Hox genes:
#Question id: 3693
#Unit 3. Fundamental Processes
In prokaryotes, the RNA primer from the lagging strand is removed and replaced by the DNA sequence. This process is catalyzed by an enzyme ________ which possess 5'-3' exonuclease activity and 5'-3' polymerase activity.