#Question id: 1302
#Unit 4. Cell Communication and Cell Signaling
A mutation that disrupts the ability of an animal cell to add polysaccharide modifications to proteins would most likely cause defects in which of the following organelles or structures?
#Question id: 5632
#Unit 5. Developmental Biology
In the egg,_______ contains proteolytic enzymes that are released by exocytosis after fertilization and are important for preventing polyspermy.
#Question id: 4431
#Unit 3. Fundamental Processes
Which of the following transcription factors enhance transcription without binding to DNA?
#Question id: 11132
#Unit 7. System Physiology – Animal
The sensation of temperature is signaled mainly by warm and cold receptors whose sensory fibers travel in association with the sensory fibers carrying pain signals. Which of the following statements best characterizes the transmission of signals from warm receptors?
#Question id: 7201
#Unit 5. Developmental Biology
Many of the cell and tissue movements in Xenopus
gastrulation happen simultaneously. Still identify the different types of
behaviors that occur during Xenopus gastrulation:
A. Epiboly: The thinning
and spreading of the animal cap cells over the vegetal hemisphere, powered by
proliferation and radial intercalation.
B. Vegetal rotation:
Vegetal cells asymmetrically press up against the inner blastocoel roof on the
dorsal side.
C. Bottle cell formation
and invagination: The leading edge of invaginating cells crawls up onto the
blastocoel roof.
D. Involution and cell
migration: Localized apical constriction at the dorsal blastopore lip creates
anisotropic forces that foster invagination.
E. Convergence and
extension: The targeted medial-to-lateral intercalation of cells on the midline
(convergence) drives anterior-posterior axis elongation (extension).
Which of the following definition are correct according to their process?