Water
Water and oil are placed in the same vessel and stirred.
The reason that oil and water will not mix is because —
A) water is polar and oil is nonpolar
B) both water and oil are polar
C) water is nonpolar and oil is polar
D) both water and oil are nonpolar
A) water is polar and oil is nonpolar
"like dissolves like"
(see figure 1)
...because it has the LOWEST pH
Select all that apply.
1. Add protein enzymes to lower the activation energy.
2. Change the reaction to a basic solution by adding vinegar.
3. Remove the phospholipids from the reaction.
4. Increase the number of different reactants in the reaction.
1. Add protein enzymes to lower the activation energy.
Figure 2.
The picture shows a student’s experiment with Elodea, a common aquatic plant.
Which change in this experiment is most likely to increase the volume of oxygen gas that accumulates in the top of the tube?
A) Replace the beaker with a larger container
B) Reduce the amount of water
C) Use fewer plants
D) Move the light source closer to the beaker
D) Move the light source closer to the beaker
Select all that apply.
Nucleus.............Centriole
Vacuole.............Cell Membrane
Cytoplasm.........Mitochondrion
Cell Wall...........Cytoskeleton
Cytoplasm, Cell Wall, Cell Membrane, Cytoskeleton
What prevents a lake or ocean from freezing solid?
A) The solid form of water floats on the liquid form.
B) A water molecule is cohesive but not adhesive.
C) Liquid water contains an excessive amount of suspended nutrients.
D) Hydrogen bonding is unable to freeze an entire body of water.
A) The solid form of water floats on the liquid form.
What is formed when the hydrogen bonds of water are broken?
A) A hydroxide ion and an oxygen ion
B) A hydroxide ion and a helium ion
C) A hydrogen ion and a hydroxide ion
D) A hydrogen ion and an oxygen ion
C) A hydrogen ion and a hydroxide ion
Which of the following is a correct statement?
A) Oil is a polar substance that attracts other polar substances.
B) A polar substance can easily be dissolved in a nonpolar substance.
C) Water is a nonpolar substance that can dissolve polar substances.
D) A polar molecule has the ability to dissolve in another polar molecule.
D) A polar molecule has the ability to dissolve in another polar molecule
"like dissolves like"
A study on a poultry farm was conducted to determine the percentage of vitamin supplement necessary to add to the feed of turkeys in order to maximize their growth.
According to this data, what percentage of vitamin supplement should be added to the turkeys’ diet?
A) 8%
B) 6%
C) 14%
D) 10%
D) 10%
Chloroplasts
Cytoplasm
Ribosomes
Genetic Material
Chloroplasts
The unique properties of water enable life to exist on Earth. Which of these is a property of pure water?
A) The polarity of water dissolves many substances.
B) It is slightly more acidic than air.
C) Its solid form is more dense than its liquid.
)D It releases heat when it evaporates.
A) The polarity of water dissolves many substances.
"universal solvent" polar!!
A) neutral
B) an acid
C) a base
D) both an acid and a base
C) a base
A) an electron
B) a polar molecule
C) an ionic molecular
D) a nonpolar molecule
B) a polar molecule
(like water! Oxygen is negative, Hydrogen is positive!)
The graphs show the results of two separate experiments on the same species of plant. Students now want to determine how the use of rainwater or bottled water affects the growth of this plant. Which conditions should be used for optimal growth as the two water types are tested?
A) 25°C, 35 mL/day
B) 20°C, 10 mL/day
C) 30°C, 45 mL/day
D) 35°C, 20 mL/day
D) 35°C, 20 mL/day
Cytoplasm
Cell wall
Endoplasmic reticulum
Cell wall
Cell wall
A) Solubility
B) Surface tension
C) Adhesion D. Hydrogen bonds
C) Adhesion
(water sticks to other substances, like the walls of the plant stem)
A) blood
B) stomach fluids
C) internal material of living cells
D) lymph
B) stomach fluids
HCl!!!
Nitrogen Oxygen Sulfur Calcium Carbon Hydrogen Phosphorus Sodium
What is CHNOPS
Carbon Hydrogen Nitrogen Oxygen Phosphorus Sulfur
Toxic substances that enter body
Sleep
Diet
Viruses
Stress
Exercise
Infectious living organisms
Inherited traits
All EXCEPT inherited traits!
Recognizes cells to facilitate multiple metabolic functions
Removes excess waste from the cell to reduce cell size
Maintains homeostasis through the transfer of information to mRNA
Processes protein synthesis with help from mitochondria
Recognizes cells to facilitate multiple metabolic functions
A) is cohesive and adhesive
B) has a high specific heat
C) has a high boiling point
D) is a good evaporative coolant
A) is cohesive and adhesive
REMEMBER THE PAPER CLIPS! AND THE JESUS LIZARD!
Enzyme A is currently functioning at a temperature of 75°C and a pH of 7.
According to the information provided in the chart above, which of the following would increase the rate of function of enzyme A?
A) Decrease the temperature to 60°C
B) Increase the temperature to 90°C
C) Decrease the pH with the addition of an acid
D) Increase the pH with the addition of a base
C) Decrease the pH with the addition of an acid
An elemental analysis was taken of four different sample discovered during an archaeological dig on a recently discovered island. Based on the data in the chart above, which sample is most likely a fossilized remains ofa living organism?
What is sample 2?
Has CHNO!!! Most abundant chemicals in life! (most life forms also have what other two elements...?)
To help supply this energy, the body will immediately increase —
A) activity in the nervous system to stimulate intake of carbon dioxide
B) the breathing rate to supply more oxygen to cells for the release of energy
C) food intake to increase the substances available for respiration
D) the need for waste products to be retained
B) the breathing rate to supply more oxygen to cells for the release of energy
Distilled - it will gain
Salty - it will lose
"salt sucks"