Science Basics
Macromolecules
Evolution
Cell Organelles
Wild
100
Which variable do we measure in an experiment?
Dependent variable
100
Is this lipid saturated or unsaturated?
Saturated (no double bonds)
100
Define natural selection
Those best adapted to their environment will survive and reproduce (survival of the fittest)
100
Which organelle controls what goes in and out of the cell?
Cell Membrane
100
What is the total magnification of a microscope with a 10x eyepiece and a 40x objective lens?
400x
(10 x 40 = 400)
200
Write a quantitative observation
Any observation involving a measurement or numbers
200
Starch is what type of macromolecule?
Carbohydrate
200
True or False: Early life required oxygen
False. O2 was not present in early Earth's atmosphere
200
What organelle is this?
Golgi apparatus
200
Name 3 characteristics of life (RACEHOGS)
Reproduction, Adaptation, Cells, Energy, Homeostasis, Organization, Growth, Stimuli
300
What is a control in an experiment?
A trial of the experiment without the IV (the "normal" test)
300
Is thymine found in DNA or RNA?
DNA
300
Name two evidences for evolution
Adaptation, Fossils, Comparative Anatomy, Biochemistry, Embryology
300
What organelle is like the janitor's closet of the school?
Vacuole (storage) OR lysosome (waste removal)
300
A cell is placed into pure water. Will water enter or leave the cell? What is the tonicity of the water?
Enter the cell, hypotonic solution
400
Write a qualitative observation
Any observation based on qualities, does not contain a measurement or number
400
Which element(s) are in nucleic acids but not carbohydrates?
Nitrogen (N) and Phosphorous (P)
400
Name three causes for evolution
Mutation, Natural selection, Artificial selection, Gene flow, Genetic drift, Isolation
400
Name a part of the school or factory that has the same function as the mitochondria
Power generator, electrical grid, etc
400
Name two macromolecule tests and what they detect (ex: Test XYZ detects proteins)
Lugol's iodine: starch
Benedict's solution: simple sugars
Biuret: Protein
Paper bag test: lipids
500
What makes a molecule "organic"?
It contains carbon, generally bound to oxygen and hydrogen, to form a molecule essential to life
500
Draw a simple diagram of a triglyceride
500
Chloroplasts are organelles with their own membranes. Who proposed they were once their own cells, and why?
Lynn Margulis proposed that they were once prokaryotes as they have their own membranes and DNA
500
Is this a plant cell or animal cell? How do you know?
Plant cell
It is rectangular/angular
500
In cystic fibrosis, certain chloride ion channels do not work properly, trapping chloride in the cells of the lungs. What effect might this have on water, the cells, and the body?
Water enters the cells (drawn to chloride).
The cell may swell and water is drawn away from the lungs, thickening mucus, and making it harder to breathe