FINAL EXAM Chapter 1-Biochemistry and the Unity of Life Flashcards
Know the abundant elements that are important for Biochemistry
What are the four major classes of Biomolecules?
-Proteins
-Nucleic Acid
-Lipids
-Carbohydrates
What roles does a protein have?
-Signal molecules
-Receptors for signal molecules and enzymes
-Biological catalysts
What are Nucleic Acids? and what are the two types of Nucleic Acid?
-Information molecules of the cell
-DNA and RNA
What are lipids?
- Storage form of fuel and serve as a barrier
What are the dual properties of a lipid?
-Hydrophobic tail
-Hydrophilic head
What are Carbohydrates?
important fuel source
What enzyme is DNA replicated by?
DNA polymerase
Which enzyme catalyzes transcription?
RNA polymerase
Translation occurs within__________
Ribosomes
What is the key difference between Eukaryotes and Prokaryotes ?
Eukaryotes have membrane enclosed compartment inside the cell and prokaryotes lack that.
What is the key difference between Plant cells and Animal cells?
Plant cells have a cell wall and a cell membrane but Animal cells have only a cell membrane
What is the function of a Plasma membrane ?
-Separates the inside of the cell from the outside.
What is the function of a plant vacuole?
-to store water, ions, and various nutrients
-Keeps the cell rigid by increasing pressure inside the cell
What is the function of a Cytoplasm
gel like fluid in the cell, it is the medium for any reactions