Exam (elaborations)
Biology 120 Midterm Questions and answers latest update
- Course
- BIOL 120
- Institution
- Abilene Christian University
Biology 120 Midterm Questions and answers latest update
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Biology 120 Midterm cell - correct answer the basic structural and functional unit of all living organisms nucleic acids - correct answer DNA and RNA DNA - correct answer A complex molecule containing the genetic information that makes up the chromosomes. RNA - correct answer single -stranded nucleic acid that contains the sugar ribose fluorescence microscopy - correct answer fluorescent molecules absorb one particular wavelength of light and meat some of that absorbed light at another wavelength (black background) confocal laser scanning microscopy - correct answer focusing a laser light source onto a very thin plane within either a naturally fluorescent specimen, or one treated with commercial fluorescent dyes. (3D image using computer) Transmission Electron Microscopy - correct answer a beam of electrons is transmitted through an extremely thin section of a specimen (best resolution of internal organization of cells) Scanning Electron Microscopy - correct answer a beam of electrons is scanned over the surface of a specimen resulting in a detailed 3D image. (intact specimens) magnification - correct answer ratio of object as viewed to real size resolution - correct answer minimum distance by which 2 points of the specimen can be separated and still be seen as 2 points plasma membrane - correct answer A selectively -permeable phospholipid bilayer forming the boundary of the cells bilayer - correct answer two layers hydrophobic - correct answer Water fearing cell wall - correct answer A rigid layer of nonliving material that surrounds the cells of plants and some other organisms. glycocalyx - correct answer The external surface of a plasma membrane that is important for cell -to-cell communication pilus - correct answer A short, thick hair -like protein structure that allows a bacterium to attach to other bacteria and surfaces.The benefits of buying summaries with Stuvia:
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