advanced cell biology

Which statement best defines a scientific theory? - Answer A scientific theory is a concept heavily supported by scientific evidence and facts. What experiment did Louis Pasteur perform to disprove the spontaneous generation theory? - Answer He used swan neck flasks filled with sterile broth to prove life did not spontaneously occur. Which of the Domains of Life DO NOT have a membrane bound nucleus? - Answer Bacteria and Archaea Which component(s) of an atom contribute...

Lipids - Answer Fat, Cholesterol, terpenes, phospholipids Histone - Answer Holds chromosomal DNA together Cristae - Answer Infoldings of the inner membrane of a mitochondrion that houses the electron transport chain and the enzyme catalyzing the synthesis of ATP. Rough endoplasmic reticulum - Answer Organizes the macromolecules in a cell Peroxisome - Answer organelle with various specialized metabolic functions; produces hydrogen peroxide Cytoskeleton...

Which of the following can readily cross the cell plasma membrane without the aid of a transport protein? a. K+ d.O2 b. Na+ e. amino acids c. RNA - Answer D. Oxygen Transport of glucose by Na+/glucose symport is an example of a. simple diffusion. d. indirect active transport. b. facilitated diffusion. e. none of the above. c. direct active transport. - Answer D. Indirect active transport A major difference between active transport and facilitated diffusion is that in faci...

Understand the conceptual basis of cell communication - Answer - cellular or organ level - speed, duration and mechanism vary Understand what a signal can be - Answer - Contact-dependent/short-range (e.g. neuronal synapsing) - Paracrine signaling (local mediators) - Endocrine signaling (long-distance, e.g. adrenaline) Understand how cells can respond to signaling - Answer - receptors - intracellular protein de/activation - cells can react in different ways depending ...

Preparation for Asymmetric Cell Division of Stem Cells - Answer The cell becomes polarized, with the cell-fate determinant localized on one side of the cell; the mitotic spindle is positioned to orient the plane of cell division; thus, one daughter inherits the fate determinant to maintain stem-cell identity Asymmetric Cell Division of Stem Cells - Answer a process internal to the dividing stem cell causes a biased inheritance of one or more important molecules that influences the...

a. The membrane reseals. - Answer Which of the following is most likely to occur after the lipid bilayer is pierced? a. The membrane reseals. b. The membrane collapses. c. A tear is formed. d. The membrane expands. b. selective permeability - Answer Which of the following functions of the plasma membrane is possible without membrane proteins? a. intercellular communication b. selective permeability c. cellular movement d. import/export of molecules a. phospholi...

he was a business man, selling silk and wanted to be able to visualize the thread count of his silk so he further improved the microscope - Answer what was Anton van Leeuwenhoek’s contribution to science? ability to differentiate two points in space - Answer define resolution particle wavelength, refractive index of medium (air or oil), angular aperture (lens) - Answer what 3 factors influence resolution a light source is ran through a condenser and as light passes t...

What are the three big picture ideas of cell biology? - Answer 1. All living organisms descend from a common ancestral cell (~3.9-2.5 billion years ago) 2. The genetic material provides the "blue print" for a cell and an organism 3. Changes in the genetic material (mutations) drive evolution What results from the fact that all living organisms descend from a common ancestral cell? - Answer we see a high degree of conservation in the genetic make up, protein sequence and f...