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Study Guide

BSCI 105- Final Exam Guide - Comprehensive Notes for the exam ( 67 pages long!)


Department
Biological Sciences Program
Course Code
BSCI 105
Professor
Keller
Study Guide
Final

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UMD
BSCI 105
Final EXAM
STUDY GUIDE

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

Only pages 1-3 are available for preview. Some parts have been intentionally blurred.

09-22-14
The Cell as the Fundamental Unit of Life
Molecular Challenges of a Cell
Make/break molecules
Build/take apart structures
Use/store energy (ex. glycogen)
Move, change shape
Interact with other cells
Organize cell components
Common Features
Phospholipid bilayer (plasma membrane)
Cytoplasm
DNA/RNA
Ribosomes
Cell Types
Prokaryotes the defining feature of the cell is the lack of internal membranes
o Cell wall/capsule
o Plasma membrane
o Cytosol
o Nucleoid body
o Ribosomes
Eukaryotes
o Plasma membrane allows compartmentalization of areas that can do different
things
o Cell wall
o Cytosol
o Endomembrane system
o Organelles
o Cytoskeleton
The Cell Endomembrane System
Nucleus
o Large organelle that contains DNA
o Double membrane - nuclear envelope
Set of membranes folded back on themselves to create giant pores that
things like ribosomes can move in and out of.
Molecules must enter and leave the nucleus through large protein
complexes called nuclear pores
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Nuclear lamina nuclear envelope supported by an internal array of
structural proteins
o Chromosomes
Chromatin - DNA + proteins
o Nucleolus
Lots of RNA and protein
Ribosome assembly
Endoplasmic Reticulum
o Continuous with nuclear envelope
Lumen interior of ER for compartmentalization. Lumen of nucleus
connects to the lumen of the ER.
Enclosed compartment separate from the rest of the cell for
storage. (ex. calcium)
Tubes and flat sheets of membrane
Tremendous surface area
Smooth ER
Site of multiple processes
o Lipid synthesis
o Metabolic reactions
o Calcium sequestration
Rough ER
Has attached ribosomes
Synthesis of secretory glycoproteins, intramembrane proteins, and
phospholipids
Bulk assembly of new membranes
Golgi apparatus
o Stack of membranes located between ER and plasma membrane
o Receive and release vesicles
“cis” face
Closest to ER
“receiving” side of the Golgi; where molecules enter the Golgi
apparatus
“trans” face
Facing plasma membrane
“shipping” side of the Golgi
Golgi is the “distribution center” of the cell
Receives molecules from the ER
Modifies molecules and adds tags that direct them to the final
destination in the cell
Can synthesize polysaccharides, such as pectin
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