Scientific Method
Why is it important to have many trials in an experiment?
To ensure the data is reliable
To ensure the data is precise
To minimize errors
Glucose falls under what macromolecule category?
Carbohydrates
What is the smallest unit of life?
Cell
What is the chemical formula of water?
H2O
What do proteins get broken down into?
Amino acids
Why must the procedure section of a lab report be detailed and specific
So that another person can repeat the experiment
What is an easy way to distinguish carbohydrates from other macromolecules?
It has ring structure and C,H,O
Justify why fire is living or nonliving.
Fire does not have cells.
What is the property of water that allows water to stick to other things?
Adhesion
Which macromolecule stores the most amount of energy? How much?
Lipids; 9 calories/gram
A set of data are all close to each other, but they are not close to the actual value. This set of data can be described as…
Precise
What macromolecule category does a phospholipid fall into and what part is hydrophilic?
Lipids; phosphate group
Why do birds migrate to the south during winter?
They are responding to the environment
When placed in water, oil does not dissolve and stays separate. This means oil is
Hydrophobic or nonpolar
What are the monomers of nucleic acids called?
Nucleotides
What part of the experiment serves as a basis of comparison. It sets the baseline results for the experiment:
Control group
An athlete will usually load up on this macromolecule the night before a big game/event. How is this macromolecule stored?
Carbohydrates ; glycogen
The 8 characteristics of life are perfect in categorizing things as biotic or abiotic. (true/false). Justify.
False. Mules are alive but cannot reproduce.
The reason some insects can "walk" on water is due to what property of water?
Cohesion, which results in high surface tension.
Why are proteins the most diverse group of macromolecules?
Mr. Singh wants to know if the temperature of a nest will impact the number of lizards born male vs. female. What is the dependent variable?
Number of male vs. female lizards born
Hydrolysis, water and disaccharide on the left; two hexagons monosaccharides on the right.
Provide two examples of animal doing homeostasis.
Maintaining an internal balance. Examples include maintaining a specific body temperature, maintaining a certain amount of water in cells, blood pressure, blood glucose levels, etc.
Draw 3 molecules of water close to each other in the correct orientation taking polarity into consideration.
Where does the name dehydration synthesis come from? Draw an example of a dehydration synthesis reaction.
Dehydration = removing water
Synthesis = Combining
Two glucose molecules combining.