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Bio 101 Session 6 September 17, 2015
SI Leader: Janet Van De Stroet
Glucose is an important example of a
Hydrogen bonds are especially important for living organisms because
They occur only inside of organisms
They are stronger than covalent bonds and maintain the physical stability of molecules
They enable polar molecules to dissolve in water, which is the universal medium for life processes
Once formed, they never break
which of the following is a property shared by all life-forms on Earth?
Use of DNA for reproduction
Presence of a cell wall composed of long chains of sugars
Storing of genetic information in the nucleus
Ability to capture energy from the nonliving environment for all metabolic needs
Cell Plasma Membranes
What is the purpose of the plasma membrane?
Forms a barrier, waste and nutrient exchange, communication, anchoring the cell in place.
What are membranes composed of?
Phospholipid bilayer, proteins, some carbohydrates.
Fluid mosaic model
Why is the fluid mosaic model said to be ‘semi-permeable’?
It only allows certain substances to pass in and out of the cell
What types of materials are able to pass though the plasma membrane?
Prokaryotic vs. Eukaryotic
Why are cells so small?
Transport of materials through cell
Surface Area: Volume Ratio
What are the ways that a cell can overcome surface area to volume ratio?
Where is it found?
In eukaryotic cells
What are some important facts?
Double plasma membrane, nuclear envelope
Contains DNA scrunched up into Chromosomes
Which represents a SA:v ratio that is more beneficial to the cell?
Which is/are apart of the plasma membrane?
A and B
B and C
A, B and C
A B and D
All of the above
Which of the following is manipulated by the experimenter in a controlled experiment?