BIO 1090 Final Notes-2 - Shreya BIO 1090 Final Notes...

Info icon This preview shows pages 1–3. Sign up to view the full content.

Shreya BIO 1090 Final Notes Lecture 13: The three things it takes to make life are Information (genetics provides information about a cell and how it functions)- we need dynamic information Chemistry- need it to keep life Compartments- life is the chemistry of compartments The Miller-Urey Experiment Chemical experiment that stimulated the conditions thought to be present on Earth which tested the chemical origin of life Used Water, Methane, Ammonia and Hydrogen to produce cyanide and formaldehyde Main components of the cell theory The cell is the structural unit of life All organisms are composed of 1 or more cell types Cells can arise only by the division of a pre-existing cell The cell is the fundamental unit of life The Basic Properties of Cells Highly complex and organized Activity controlled by a genetic program Can reproduce- makes copies of themselves Assimilate and utilize energy (source of all energy on earth is the sun) Carry out many chemical reactions through the use of enzymes which allow the reactions to occur without a large input of energy Engage in mechanical activities- have the ability to move and do this because they have a cytoskeleton Respond to stimuli through receptors embedded on the plasma membrane (e.g. leptin proteins interact with the receptors) Capable of self-regulation They evolve Lecture 14: Two types of cells on Earth: 1. Prokaryotic a. Bacteria b. Structurally simpler 2. Eukaryotic a. Protista, fungi, plants, animals b. Structurally more complex
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

2 Basic Properties of Cells: Cells are highly complex and organized o Contain a large number of parts o Organized with respect to time and space o Parts interact with little tolerance for error o Fidelity of interaction is maintained through control of regulation of parts (Provides precision in cellular activities o Cellular organization is very consistent (conserved throughout evolution) The nuclear pore complex enables movement of molecules into and out of the nucleus Cytoskeletal elements –actin filaments, microtubules, intermediate filaments o Contribute to cell shape and movement o Provide structural support o Support transport of material Some examples of different cell types in a human fetus are: red blood cells, muscle cells, fat cells, etc. Viruses A virus is a non-cellular macromolecular package that can function and reproduce only within living cells o Outside of cells, a virus can exist as an inanimate particle- VIRION o A VIRION is composed of: § Small amount of DNA or RNA (encoding to a few hundred genes) § Protein capsule = capsid Lecture 15: Viruses: Viruses bind to a cell surface via specific proteins and enter into a cell- this defines the cell types the virus can infect and the host range WIDE HOST RANGE: o Rabies can infect cells in dogs, bats and humans NARROW HOST RANGE: o Humans cold and influenza viruses infect epithelial cells of the human respiratory system
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern