Scientific Investigation
Cells and Cell Theory
Water
Macromolecules and Enzymes
Cell Membrane and Transport
100
Students in Mr. Kelly's class predicted that "if eggs are placed in syrup, water will leave the egg causing it to shrink." What type of statement is this?
A hypothesis
100
Which cells are smaller and simple - prokaryotes or eukaryotes?
prokaryotes
100
What are the 7 properties of water?
Water is polar - Solid water less dense than liquid water - Adhesion - Cohesion - High Heat Capacity - High Heat of Evaporation Neutral pH
100
Carbon is a part of ALL organic compounds. What about Carbon allows it to be the main part of so many different molecules?
It can form four bonds
100
The cell membrane is mostly made up of one kind of fatty molecule. What are they?
Phospholipids
200
Which would be a more reliable source for the most up-to-date scientific research: a biology textbook, a scientific journal, or a newspaper?
A scientific journal
200
What are the three tenets (main ideas) of cell theory?
All living things are made of cells - Cells are the basic unit of life - Cells only come from other living cells
200
Which property of water explains why many lakes won't freeze solid in winter?
Water is less dense as a solid (ice floats!!)
200
What is the function of an enzyme?
To speed up reactions
200
What structures provides a "bridge" or "tunnel" through the cell membrane?
Transport or channel proteins
300
In an experiment to determine the effect of different pH levels on enzyme function, which is the Independent Variable? The Dependent Variable?
IV - pH DV - enzyme function
300
Name 3 of the 4 things that can be found in all cells
Cytoplasm; ribosomes; cell membrane; DNA
300
Draw a diagram of a water molecule. Include the charges on each atom.
Diagram:
300
List the 4 Macromolecules and the monomer name next to it. (Example: Carbohydrates - )
Carbohydrates: monosaccharides - Lipids: Triglyceride (or fatty acid) - Nucleic Acids: Nucleotides - Proteins: Amino Acids
300
What type of transport (active or passive) does NOT require a cell to use energy?
Passive
400
What is included in an experiment as a comparison group to the experimental group?
A control group
400
When Hooke looked at cork through a microscope and described cells, what was he actually seeing (cell walls, nuclei, or cell membranes)?
Cell walls
400
Which property of water helps keep organisms from overheating or freezing?
High heat capacity
400
List each macromolecule and one function for each (Ex: Carbohydrates - )
Carbohydrates (primary energy source) - Lipids (energy storage, energy source, insulation, impact protection, key part of the cell membrane) - Nucleic acids (Storing genetic information, directing protein synthesis) - Proteins (Structure, transport, movement, cell reactions, regulatory, defense)
400
Diffusion involves the movement of molecules from an area of ___________ to an area of ______________.
high concentration - low concentration
500
Two students design an experiment to see how light affects plant growth. They exposed 10 bean plants to light for 8 hours a day, 10 radish plants to light for 6 hours a day, and 10 corn plants to light for 4 hours a day. At the end of 20 days, they measured the plants and compared the change in height of the plants. What is the flaw in this experiment?
Too many variables (testing too many things)
500
What organelle would a unicellular organism store food in until it is broken down (digested)?
a vacuole
500
How does sweating help maintain homeostasis?
Because it cools you down.
500
If you have a breakfast of eggs (made up of protein and fat), what monomers would your body have available once that breakfast was broken down?
amino acids and triglycerides (or fatty acids)
500
If an egg A is put into a concentrated saltwater solution, and egg B is put into distilled water, which egg would you expect to lose weight? Why?
The egg in the saltwater solution - Water would exit the egg because the saltwater is hypertonic.
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