Transport Across the Membrane
Role of Selective Permeability in Phospholipid Membrane
Explain the concept of selective permeability.
Predict the movement of molecules across the
phospholipid membrane based on t
Chemical Bonds 14-9-2016
Biology is founded on the principles of chemistry and physics
Components of cells
Functions of proteins
Flow of nutrients
Evolution of new genes
Biochemistry= atoms, molecules in living organism
Twelve Broad principles
The first eight principles are often used as criteria to define the basic feature of life
Principle 1: Cells are the simplest units of life.
The term organism can be applied to all living things.
Organisms maintain an i
Water and hydrogen bonds
Water ( H 2 O H-O-H) is a polar molecule
Electrons spend more time with O than H's
H's become slightly +, O slightly
When polar molecules are dissolved in water
The H's of water molecules are attracted to th
Scientific Methods 12-9-2016
From the Latin "scientia", meaning knowledge (based on
demonstrable and reproducible data)
The intellectual and practical activity encompassing the systematic
study of the structure and behavior of the physical and
Cell structure and Function 26-9-2016
Cell biology: Study of individual cells and their interaction with each other
Cell Theory (Cell Doctrine)
A unifying concept in biology
All organisms are composed of cells
Life processers of metabolism and heredity o
Organic vs. inorganic
of elements other than carbon
Organic: carbon-based chemistry (Carbohydrates, lipids,
proteins, Nucleic Acids)
1. What is the function of the plasma membrane?
2. Why is the plasma membrane called a mosaic?
3. How are the phospholipids arranged in the plasma membrane?
4. What types of proteins are found in the plasma membrane? Wha
1. Where is DNA found?_
2. Four categories of macromolecules are:
3. What is a monomer?
4. What are the main functions of lipids?
5. True or False. Lipids are polar.
6. Functions of nucleic acids
1. Summarize the steps in a signal transduction
pathway from receptor binding to activation of
2. Compare and contrast the different types of
receptors including Enzyme linked, ligand-gated ion
Volvox, Chlamydomonas, and the Evolution of Multicellularity
By: Stephen M. Miller, Ph.D. (Dept. of Biological Sciences, Uxniversity of Maryland, Baltimore
County) 2010 Nature Education
Citation: Miller, S. M. (2010) Volvox, Chlamydomonas, and the Evoluti
THE PROCESS OF SCIENCE
By the end of this session, students will:
1. List the properties of life and provide an
example of each
2. Compare and contrast methods of scientific
3. Describe how a valid exper