Chapter 1 (Pt. 4) Flashcards
what are the three postulates of Cell Theory?
- all life forms have one or more cells
- cell is the simplest unit of life
- all cells come from other cells
what is modern cell theory?
- all life is composed of one or more cells
- cells are the basic functional and organizational unit of life
what is modern cell theory?
- all life is composed of one or more cells
- cells are the basic functional and organizational unit of life
- all cells come from pre-existing, living cells via cell division
modern cell theory also states that: (4)
- genetic info is passed on to new cells
- activity of an organism is dependent on activity of independent cells
- energy flow occurs within cells
- cells have the same chemical composition
activity of an organism is dependent on activity of independent cells. what’s a pathology where this goes wrong?
diabetes
what is another way to describe “energy flow” within cells? (2)
metabolism and biochemistry
describe the central dogma of genetics
DNA is transcribed into RNA which is translated into protein
when can info travel from protein to protein?
prios
when can info travel from protein to protein?
prions
functions of RNA? (3)
- messenger between DNA and proteins
- store genetic material
- act as a catalyst
if all cells come from living cells, where did the first cell come from?
RNA World Hypothesis: RNA were first and had functions of DNA and proteins
why would it have been beneficial for RNA to code for DNA in the RNA World Hypothesis?
DNA is more stable
does cell theory apply to bacteria?
yes
does cell theory apply to plants?
yes
does cell theory apply to neurons?
yes
