Biomg 1350 - Study guides, Class notes & Summaries

Out of approximately 21,000 protein-coding genes in humans, how many are approoxiamtely devoted to cell signaling? Correct Answer-More than 7,000 What types of molecules can Signaling Molecules or Ligands be? (General Principle of Signaling) Correct Answer-Proteins, Peptides, Amino Acids, Nucleotides, Steroids, Fatty Acid Derivatives, Gases What must a cell have in order to accept a signal? (General Principle of Signaling) Correct Answer-A receptor What processes does the intracellular ...

BIOMG 1350 Lecture 11 Review Questions with Complete Solutions.

What unit of length would you generally use to measure a typical plant or animal cell? Correct Answer-Micrometers Resolving power is the ability to distinguish between two objects. Resolving power is limited by the _____________ of illumination. Correct Answer-Wavelength Electron microscopy has a resolving power in Correct Answer-Angstroms Cell theory implies that living organisms do not form Correct Answer-Spontaneously Cell theory implies that living organisms must be generated fro...

BMP4 Ans signaling molecule that causes ectoderm to become mesoderm; in the absence of this molecule, the cells become neurons true Ans True or False: BMP4 is produced uniformly throughout the embryo BMP inhibitors Ans secreted by the organizer to pattern epidermal development lowest Ans concentration of BMP4 is ______ near the organizer ventral, epidermal Ans Strong BMP4 signaling specifies _____ fate in the mesoderm and endoderm; specifies _______ fates in the ectoderm. cortical ...

bicoid - these genes encode cytoplasmic determinants in the anterior tip of the embryo syncytial blastoderm - the stage of embryonic development during which bicoid expression is significantly reduced syncytial blastoderm - stage of embryonic development in which nuclei move to the periphery of the cell, forming a single layer, with each nuclei barely separated from its neighbors cellular blastoderm - stage of embryonic development after cellularization and before gastrulation bicoid...

bicoid Ans these genes encode cytoplasmic determinants in the anterior tip of the embryo syncytial blastoderm Ans the stage of embryonic development during which bicoid expression is significantly reduced syncytial blastoderm Ans stage of embryonic development in which nuclei move to the periphery of the cell, forming a single layer, with each nuclei barely separated from its neighbors cellular blastoderm Ans stage of embryonic development after cellularization and before gastrulation...

Steps of embryonic development Correct Answer-1) Zygote (fertilized egg) undergoes early cleavages -> morula (group of equivalent, undistinguishable cells) 2) As morula grows, cell acquires specific characteristics & some morphological differences (ex. embryonic axes) -> blastula (characterized by presence of hollow cavity, blastocele) 3) Gastrulation (gastrula) originates 3 definitive germ layers (ectoderm, mesoderm, endoderm) 4) Once scaffold & primordial for tissues & organs laid out...

1-5 um - average organelle size 25 nm - average ribosome size 0.1 nm - single hydrogen atom size 0.2 mm (200 micrometers) - resolution of unaided eye 0.2 um (200 nm) - resolution of light microscope 0.2 nm (2 A) - resolution of electron microscope Resolving power - Ability to distinguish 2 close objects; if they are below resolving power apart, cannot be distinguished with this instrument

BIOMG 1350 – Final Exam Questions With Correct Answers Bicoid - answerthese genes encode cytoplasmic determinants in the anterior tip of the embryo syncytial blastoderm - answerthe stage of embryonic development during which bicoid expression is significantly reduced syncytial blastoderm - answerstage of embryonic development in which nuclei move to the periphery of the cell, forming a single layer, with each nuclei barely separated from its neighbors cellular blastoderm - answerstage ...