.When a piece of liver is dropped into hydrogen peroxide, the peroxide bubbles vigorously as the hydrogen peroxide (H2O2) decomposes into water (H2O) and oxygen (O2). However, if the liver is cooked first, the reaction fails to occur. The reason for this is
A. Reactions take place faster at lower temperatures
B. Heating kills the germs that cause the bubbling
C. Heating damages the enzyme in liver that breaks down hydrogen peroxide
D. Heating removes the water and oxygen from the liver
100
The sodium-potassium pump regulates the amount of sodium and potassium inside of cells, particularly nerve and muscle cells. In this process, an ATP is burned, causing three sodium ions to be pumped out and exchanged for two potassium ions, which are pumped in by a membrane protein. Both ions go against their concentration gradients.
The sodium-potassium pump is an example of
A phagocytosis.
B passive transport.
C active transport.
D facilitated diffusion.
100
After studying several things, John noted that birds came from the extinct dinosaurs. He noted the gradual change in species over time. In which of the following fields does he most likely work?
A Cytology
B Botany
C Evolutionary Biology
D Biochemistry
100
Of the following organelles, which group is involved in manufacturing substances needed by the cell?
A. Lysosome, vacuole, ribosome
B. Ribosome, rough ER, smooth ER
C. Vacuole, rough ER, smooth ER
D. Smooth ER, ribosome, vacuole
100
A student wanted to study the effect of temperature on algae levels in a local stream. Which items are most useful for gathering data and most appropriate for communicating the results of her observations?
A Research on the Internet and videotapes of water samples
B Microscopes and written descriptions of weather patterns
C pH strips and written observations of stream water
D Test tubes, thermometers, and graphs of results
200
Which of the following statements is true about catalysts?
A All catalysts are enzymes
B They speed up the reaction and lower the activation energy
C They slow down a reaction and increase the activation energy
D They are all used up in a reaction.
200
Jim is in a crowd of people at the mall looking for his girlfriend Tammy, who was supposed to meet him for dinner. Jim realizes Tammy is across the room as he catches a whiff of her overpowering perfume, 'Paris #6'.
Which process explains why Jim is able to smell the perfume?
A osmosis
B diffusion
C) active transport
D) facilitated diffusion
200
What kind of question would an environmental biologist ask?
A How can a prosthetic hand be made?
B How can a vaccine for HIV be developed?
C How can the extinction of plants and animals be prevented?
D How can more crops be grown in poor soils?
200
While viewing a slide of rapidly moving sperm cells, a student concludes that these cells require a large amount of energy to maintain their activity. What organelles provide this needed energy?
A vacuoles
B ribosomes
C chloroplasts
D mitochondria
200
A scientist hypothesizes that the temperature at which an alligator's egg is incubated will determine whether the alligator will be male or female. The independent variable is
A The male alligators
B The temperature
C The incubator
D The gender of the alligator
300
Which of the following correctly summarizes cellular respiration?
A.6O2 + C6H12O6 = 6CO2 + 6H2O + energy
B.6CO2 + C6H12O6 + energy = 6CO2 + 6H2O
C.6CO2 + 6H2O = 6O2 + C6H6O6 + energy
D.6CO2 + 6H2O + energy = 6O2 + C6H12O6
300
Some molecules are too big to pass through the phospholipid bilayer of the cell membrane. These molecules need to pass through ________________ that are embedded in the cell membrane.
A proteins
B ribosome
C cell wall
D carbohydrates
300
A plant captures the sun’s rays to make glucose .Which of the following example best describes the characteristic of life
A. Cell organization
B. Obtain energy
C. Homeostasis
D. Reproduction
300
A. Vacuole
B. Lysosome
C. Rough ER
D. Smooth ER
This organelle can fuse with a vacuole to destroy unnecessary cellular components.
300
A scientist performs a series of experiments to confirm an idea regarding cellular metabolism. The results of the experiments support the scientist’s initial idea, and after conferring with colleagues, the scientist discovers that evidence from many experiments has supported the same idea. This idea could now be considered a(n)
A Theory
B Hypothesis
C Observation
D Control
400
Which most accurately describes the difference in ATP production between aerobic respiration and anaerobic respiration?
A Aerobic respiration produces more ATP than anaerobic respiration.
B Anaerobic respiration produces more ATP than aerobic respiration.
C Only anaerobic respiration produces measurable amounts of ATP.
D. Anaerobic and aerobic respiration produce the same amount of ATP
400
Which of the following macromolecules are a prominent part of animal tissues that function in insulation, helping animals conserve heat?
A Carbohydrate
B protein
C nucleic acid
D lipid
400
Inside the human body, heat is constantly generated as a byproduct of chemical reactions. Humans must be able to release heat to the environment. This adaptation is necessary for maintaining
A energy
B organization
C homeostasis
D locomotion
400
Which of the cells characterized below is a prokaryotic cell?
A. Ribosome, Cell Wall Chloroplast, Nuclear Membrane, Plasma Membrane
B. Ribosome, Cell Wall, Chloroplast, Plasma Membrane
400
Although scientists should remain open to new ideas, what other traits is also important to balance this?
A Open mindedness B Skepticism
C Honesty D Bias
500
Two test tubes are filled with a solution of bromthymol blue. A student exhales through a straw into each tube, and the bromthymol blue turns yellow. An aquatic green plant is placed in each tube, and the tubes are corked. One tube is placed in the dark, and the other tube is placed in direct sunlight. The yellow solution in the tube in sunlight turns blue, while the one in the dark remains yellow. Which statement best explains why the solution in the tube placed in sunlight returns to a blue color?
A Oxygen was produced by photosynthesis.
B Oxygen was removed by respiration.
C Carbon dioxide was removed by photosynthesis.
D Carbon dioxide was produced by respiration.
500
In humans, excess blood glucose is stored in the liver and in muscle tissue in the form of glycogen. Glycogen is a long chain of glucose molecules bonded together. Because of this, glycogen is called a _____________________.
A lipid
B monosaccharide
C polysaccharide
D protein
500
When looking through the microscope at a sample of elephant skin, you see thousands of cells. Which of the following characteristic best describes about the elephant skin?
A Heredity
B Response to stimuli
C Cell organization
D Evolve
500
a. vacuole
b. lysosome
c. ribosome
d. rough ER
During endocytosis, cells can take in nutrients from their surroundings and then store them using these organelles.
500
A biochemist is performing an experiment to determine the effects of chemical X on the growth of bacteria. Which test tube is the control?
A. Test tube 1 with 20ml bacteria no Chemical X
B. Test tube 2 with 20ml bacteria and 10ml Chemical X
C. Test tube 3 with 20ml bacteria and 15ml Chemical X
D. Test tube 4 with 20ml bacteria and 20ml Chemical X