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WorksheetsUnit 2 Study Guide
Total questions: 51
Worksheet time: 26mins
What does it mean for water to be “polar”?
When a molecule has opposite charges
When a molecule has similar charges
What are the six most important elements for life that can be found in your body?
Carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfur
Cobalt, helium, nickel, osmium, palladium, sulfur
Define Cohesion:
Water sticks to other substances
Water sticks to water
Explain how cohesion allows insects to walk along the top surface of water.
Adhesion between water molecules creates surface tension
Cohesion between water molecules creates surface tension
Define Adhesion:
Water sticks to other substances
Water sticks to water
Explain how adhesion allows water to be transported from the roots to the leaves and other parts of the plant.
Water sticks to the inner walls of the plant to travel from root to tip.
Water sticks to the outer walls of the plant to travel from root to tip.
Define High Specific Heat
the ability of water to change its temperature to its environment
the ability of water to resist temperature change despite environmental change
Explain high specific heat allows the body to cool off when sweating.
when your body is hot, you shiver to cool off
when your body is hot, you sweat to cool off
Explain what is unique about Water´s Density.
Water is less dense when solid
Water is more dense when solid
Explain how low density of ice allows aquatic organisms to survive in cold regions.
Ice layer insulates the liquid water beneath to keep waters warm thus insuring the survivability of the aquatic organisms who live there.
Ice layer provides no protection and makes the aquatic organisms colder.
Define Universal Solvent.
Dissolves many substances
Dissolves few substances
Dissolves no substances
Define pH:
measures acidity and turbidity
measures acidity and basicity
measures alkalinity and turbidity
Which number is the substrate?
1
2
3
4
Which number is the active site?
1
2
3
4
Which number is the enzyme?
1
2
3
4
Which number is the enzyme substrate complex?
1
2
3
4
Which number is the product?
1
2
5
3
How did you know which one was the enzyme? Its shape remained _________________.
lower
break
unchanged
link
Enzymes __________ activation energy which ______________ the rate of the reaction.
lower, unchanged
lower, increases
increases, lower
unchanged, lower
The graph shows the energy changes during the progress of a chemical reaction. The graph below is a reaction without an enzyme present. Choose the correct picture of a graph for the reaction with an enzyme:
Which of the energy changes could be decreased by adding an enzyme?
1,2, and 3
1 and 2 only
1 and 3 only
2 and 3 only
Enzymes regulate or ____________ chemical reactions in your body.
control
pH
active site
substrate
Enzymes may be involved in reactions which _______ down molecules or ________ molecules together.
break, link
link , break
link, denatures
denatures, link
Which class of macromolecules do enzymes belong to?
lipids
proteins
nucleic acids
carbs
Each enzyme has an optimum ________ and __________.
pH and temperature
product and active site
denatures and link
enzyme and break
As temperature increases above the optimum temperature, the enzyme gradually _____________ (loses its 3-D shape) and can no longer function.
link
break
denatures
substrates
What is the optimum temperature for this enzyme?
30 degrees C
35 degrees C
40 degrees C
45 degrees C
What is the optimum pH for this enzyme?
6
7
8
9
Which enzyme works best in a neutral pH?
A
B
C
D
Which of the following statements is true?
Enzymes are usually very specific to their substrates.
An enzyme will be broken down into products by its substrate molecule.
Most enzymes can catalyze multiple reactions and can accommodate more than one substrate.
Both the enzyme and its substrate molecule are broken down in their chemical reaction.
What is the monomer for carbohydrates?
monosaccharide
glycerol and fatty acids
20 amino acids
nucleotide
What are the monomers for lipid?
monosaccharides
glycerol and fatty acids
20 amino acids
nucleotides
What is the monomer for proteins?
monosaccharide
glycerol
20 amino acids
nucleotides
What is the monomer for nucleic acids?
monosaccharides
glycerol
20 amino acids
nucleotides
What is a function of carbohydrates?
provide fast energy
provide long term energy
builds muscle
contain genetic information to make proteins
What is a function of lipids?
provide fast energy
provide long term energy
build muscle
genetic information to make proteins
What is a function of proteins?
provide fast energy
provide long term energy
build muscle
genetic information to make proteins
What is the function of nucleic acids?
provide fast energy
provide long term energy
build muscle
genetic information to make proteins
What is an example of a carbohydrate?
glucose, cellulose
oils and fats
enzymes
DNA and RNA
What are some examples of lipids?
glucose and cellulose
oils, fats, and phospholipids in the cell membrane
enzymes
DNA and RNA
What is an example of proteins?
glucose and cellulose
oils and fats
enzymes
DNA and RNA
What are some examples of nucleic acids?
glucose and cellulose
oils and fats
enzymes
DNA and RNA
Food sources for carbs:
fruits and bread
dairy and oils
meat, nuts and beans
none
Food sources for lipids:
fruits and bread
dairy and oils
meat, nuts and beans
none
Food sources for proteins:
fruits and breads
diary and oils
meat, nuts and beans
none
Food source for nucleic acids
fruits and breads
dairy and oils
meat, nuts, and beans
none
Which macromolecule would you aim to eat if you have a track meet in an hour? (Hint: What would give you fast energy?)
lipids
carbohydrates
proteins
nucleic acids
Which macromolecule would you aim to eat if you were building muscle?
lipids
carbs
proteins
nucleic acids
Which macromolecule allows animals to hibernate, or sleep for many months, over the winter and have enough energy to survive? (Hint: What allows you to store energy long term for later use?)
lipids
proteins
nucleic acids
carbs
Both lipids and carbohydrates are important in animal cells because both
provide insulation
store energy
form cell walls
contain nitrogen
Which of the following molecules are the main component of the cell membrane?
enzymes
carbs
nucleic acid
lipids
