Biology 120 Exam 1 Review
Describe the characteristics of a scientific hypothesis.
Must be testable & falsifiable
What are the features of a controlled experiment?
The control is the subject or group that is similar in every way to the experimental
subject or group EXCEPT that the control does not get the experimental treatment.
Distinguish between primary and secondary sources.
Primary sources are a paper written by a scientist sent of to a journal
Secondary sources are media reports in radio, news paper, magazines, tv
Know the following terms & how they relate to the scientific method:
Double-blind experiment- Limited
knowledge of experimental hypothesis.
No knowledge of which group Scientific theory- can explain how the
participants belong to. natural world works and is well-
Correlation studies- scientist can look at supported by observation and
existing data and determine if their is a experiment.
relationship or correlation b/w variables. Bias- to make sure a experiment is
Does not signify causation. unbiased scientist use control
Alternative hypotheses- differences b/w experiments
Statistical significance- result is very unlikely
due to chance difference b/w the experimental
and control groups... results likely represent a
Water, Biochemistry, and Cells
List the characteristics of life.
Why is pH important for life?
It measures the amount of H+ in a solution
Describe the physical and chemical properties of water. What’s the difference between
adhesion & cohesion?
physical-liquid at room temp. they cohere and adhere. can dissolve other substances. Can
hold a lot of heat. Expands when freezes less dance then liquid water
Adhesion- clings to many other substances, wetting them
Cohesion- stick to each other, creates surface tension
Describe carbohydrate structure(s) and function(s); Know the monomer & polymer
Structure- CH2OH, look like a hectagon Function- Provide quick energy
Monomer- Monosaccharide: glucose
Polymer- Polysaccharides: starch, glycogen, cellulose, chitin
Describe protein basic structure and function(s); Know the monomer & polymer
Structure- Chains swirled together
Function- Control cell processes, Speed life processes (enzymes) form structural parts of
cells. Needs specific shape to function. transport lipids.
Describe lipid structure(s) and function(s); Know the monomer & polymer
Structure- Triglyceride has 3 fatty acid tails
Cholesterol has 0 fatty acid tails
Phospholipids have 2 fatty acid tails
Function- build cells and hormones. Long term energy storage
Monomer- Monoglyceride (one fatty acid chain)
Polymer- Triglyceride, Steroids, Phospholipids
Describe nucleic acid structure(s) and function(s); Know the monomer & polymer
Structure-DNALadder RNAhalf a ladder in RNAinstead of T its U
Function- Stores hereditary info from 1 generation to the next and transmits genetic info
Monomer- Nucleotides AC G T (or U )
Polymer- NucleicAcid in DNA& RNA
Describe the plasma membrane structure and function.
Structure- composed of bilayer of phospholipids
Function- Controls what substances go in and out of the cell
What is Cell Theory?
1. All kn