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?

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#Question id: 312

#Unit 1. Structure and Function of Biomolecules

The type of molecules that forms the aggregate through a self-assembly process which is driven by the hydrophobic effect is _______

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#Question id: 313

#Unit 1. Structure and Function of Biomolecules

What is the difference between a particle being hydrated versus being solvated?

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#Question id: 314

#Unit 1. Structure and Function of Biomolecules

Which statement explains the cleaning action of soap on greasy dishes?

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#Question id: 315

#Unit 1. Structure and Function of Biomolecules

Which is not a proper way to form a hydrogen bond? (The symbol ʺRʺ represents a general organic group. The hydrogen bonding is represented by dashed lines.)

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#Question id: 316

#Unit 1. Structure and Function of Biomolecules

Which of these noncovalent forces in biological systems is usually the strongest?

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#Question id: 317

#Unit 1. Structure and Function of Biomolecules

Hydrogen bonds can occur when hydrogen is covalently bonded to atoms like nitrogen and oxygen. What property of nitrogen and oxygen is important for this?