Benchmark #1 Flashcards
True or false
Enzymes are not reusable
False
Explain how enzymes and substrates are like lock and key.
Only one substrate can fit in an enzymes active site
What is the job of nucleic acids
To transmit genetic information
DNA is an example of this molecule
Nucleic acids
What type of bonds are found in saturated fats
Single bonds
Are lipids polar or non polar?
Non polar
What are the building blocks of nucleic acids
Active site
What do we call the area of an enzyme where the substrate joins with the enzyme.
Nucleotides
What complex carbohydrate stores energy in the blood of animals?
Glycogen
What complex carbohydrate forms the shell (exoskeleton) of insects
Chitin
What are the four organic macromolecules that we have studied?
Lipids
Protein
Nucleic acids
Carbohydrates
Proteins are a polymer of what monomer?
Amino acids
What complex carbonhydrate is used by plants to store energy
Starch
This macromolecule is use to form enzymes and hemoglobin?
Protein
What do we call the amount of energy needed to start a reaction?
Activation energy
What is PH range for acids
0-6.9
Which is the strongest base listed below?
pH 8 or pH 11
PH11
True or false?
When ice melts, new hydrogen bonds are formed
False.
Melting of hydrogen bonds breaks hydrogen bonds
A substance has a pH of 10. To attempt to neutralize it would you add an acid or a base?
An acid acts as a buffer
You have made some ice tea from a powder mix. Identify the solute and the solvent.
Solute= iced tea mix
Solvent= watery
Monosaccharides, disaccharides and polysaccharides are all….
Carbon hydrates
What is the main function is carbonhydrates?
To provide energy
What complex carbonhydrate is used as a structural molecule in plants?
Cellulose
True or false?
Living organisms must respond to their environment
True
True or false?
Living organisms must be able to move
False
A pure substance that cannot be broken down into simpler substances is called a(n)…
Element
A pure substance made up if two or more elements chemically combined in a fixed proportion is called a(n)..
Compound
When water freezes does it become more dense or less dense?
Less dense
The attraction between molecules of the same substance is called
Cohesion
The attraction between molecules of different sun stances is called
Adhesion
What is polarity
The uneven distribution is electrons throughout a molecule, causing partial charges.
Biology is the study of
Life
This is an “If … Then” statement.
Hypothesis
The solution is a light red color is an example of a(n)…
Observation
The scientific method begins with…
Making an observations or identifying a problem.
The variable in an experiment that the researcher is studying is the…
Independent, or manipulated, variable
The variable in an experiment that we are looking at for a change is the…
Dependent or responding variable
The process of keeping a stable internal environment is called…
Homeostasis
How many independent variables can be tested in a well designed experiment
One
Complete the scentence…
Reactions begin with ____ and end with_____.
Reactants
Products
Substances that change the speed of a reaction are called…
Enzymes
What three factors affect the function is an enzyme?
Temperature
pH
Amount of enzyme
DNA is an example of this macromolecule
Nucleic acids
What suffix do many sugars end with?
-ose
Organic molecules must contain the element
Carbon
Which type of fat is considered to be a “healthy fat?”
Unsaturated fat
What macromolecule stores energy for later use and provides insulation in cold climates?
Lipids
