University:
York University
Course:
BIOL 107 | Introduction to Cell Biology
Academic year:

2024
Views:

269

Pages:

2
Author:

Ciara T.

Nucleic Acid RNA contains uracil Basic unit of Nucleic Acid is the Nucleotide Nucleotide Composed of: Nitrogenous base Purines (adenine, guanine) Pyrimidines (cytosine, thymine, uracil) Sugar (Ribose or deoxyribose) Phosphate group Lipids structure is diverse predominantly non-polar and hydrophobic Polymerization Building repeating units DNA polymerase RNA polymerase peptidyl-transferase Depolymerization Disassembly of repeating units Nuclease Protease Information System All cells contain DNA as their genetic info, which codes for RNA, which in turn codes for protein Energy and Metabolism All cells need a source of carbon and a source of energy (E) All cells use E to build macromolecules and carry out the processes of life All cells use ATP as the major E carrier inside cells Main differences: pepto glycan polymer composed of sugars amino acid gram-positive - thick layer gram-negative - thin layer surround = outer membrane Describe the process by which proteins are targeted to the RER and other parts of the endomembrane system? Asking us to explain how proteins reach their destinations