#Question id: 2439
#Unit 2. Cellular Organization
α- and β-tubulin
a. are highly conserved.
b. bind GTP.
c. hydrolyze GTP to GDP.
d. are found in all eukaryotes.
e. are related to the bacterial protein FtsZ.
#Question id: 8955
#Unit 9. Diversity of Life Forms
#Question id: 32345
#Unit 1. Molecules and their Interaction Relevant to Biology
#Question id: 7224
#Unit 5. Developmental Biology
Following statements are given regarding to the migration through primitive streak in chick.
A. Cells migrate to the primitive streak, and as they enter the embryo, the deep-moving cells give rise to the endodermal organs of the embryo, as well as to most of the extraembryonic membranes.
B. The migration of mesodermal cells through the anterior primitive streak and their condensation to form the chordamesoderm also appear to be controlled by FGF and Wnt signalling.
C. Wnt is expressed in the primitive streak and repels migrating cells away from the streak.
D. Once cells migrate away from the streak, further movement of the mesodermal precursors appears to be regulated by FGF8 proteins.
Which of the following statement is incorrect?
#Question id: 28323
#Unit 5. Developmental Biology
A cleavage furrow cleaved only a portion of the cytoplasm and does not penetrate the yolky portion, this type of cleavage is referred to as___