Show:
Scientific Method
Biochemistry
Cells and Metabolism
Greenhouse Effect & Cell Respiration
Photosynthesis & Global Warming
100
Define the term theory. A: Possible answer to a question B: Facts C: The most likely answer to a question that has been thoroughly tested by several different investigators D: An educated guess
C: The most likely answer to a question that has been thoroughly tested by several different investigators
100
An individual water molecule is held together by which kind of bond? a. ionic bond b. covalent bond c. hydrogen bond d. James Bond
b. covalent bond
100
8. Which of the following is the best definition of metabolism? a. the chemical reactions by which cells get energy from food b. the rate at which a person digests food c. all of the chemical reactions that take place in a cell d. the amount of energy expended in acquiring food
c. all of the chemical reactions that take place in a cell
100
How does ATP provide energy to a cell? a. It adds a phosphate group, releasing energy in the process. b. It releases electrons, which are a source of energy. c. It releases protons, which are used in the mitochondrion to create energy. d. It loses a phosphate group, releasing energy in the process.
d. It loses a phosphate group, releasing energy in the process.
100
What is chlorophyll? a. It is the plant organelle in which photosynthesis takes place. b. It is the green pigment that enables plants to convert light energy to chemical energy. c. It is one of the openings on the bottom of a leaf through which CO2 enters. d. It maintains the hydrogen ion concentration gradient that makes ATP production possible.
b. It is the green pigment that enables plants to convert light energy to chemical energy.
200
Why is it that scientists do not study supernatural questions, such as whether or not there is a God? a. It was proven by science long ago that God does not exist. b. Scientists believe that supernatural matters are irrelevant to our lives. c. Questions about the supernatural produce scientifically untestable hypotheses. d. Scientists fear that testing supernatural phenomena will undermine the very basis of science.
c. Questions about the supernatural produce scientifically untestable hypotheses.
200
Water consists of polar molecules. Due to this property, what types of substances can water very effectively dissolve? a. non-polar substances b. lipids c. all organic molecules d. polar substances
d. polar substances
200
Which of the following is NOT part of a prokaryotic (bacterial) cell? a. nucleus b. cytoplasm c. DNA d. plasma membrane
a. nucleus
200
Where in the cell does respiration occur? a. mitochondria b. ribosomes c. nucleus d. endoplasmic reticulum
a. mitochondria
200
The chlorophyll pigments found in green leaves absorb what color(s) of light? a. green b. red c. blue and red d. green and blue
c. blue and red
300
4. In human medical experiments, what is a placebo? a. a medication given to subject to alleviate anxiety b. a medication whose effect is known to be similar to that of the one being tested c. a substance that does not contain the medicine being tested d. the experimental medicine that is being tested
c. a substance that does not contain the medicine being tested
300
What monomers (molecular building blocks) would you need to build a large polysaccharide such as starch? a. amino acids b. nucleotides c. glucose molecules d. fatty acid chains
c. glucose molecules
300
Which of the following groups of foods has the highest overall protein content? a. meat, beans, nuts and eggs b. bread, pasta, sugars and potatoes c. grains, butter, bananas and oils d. fruits, vegetables, milk and pasta
a. meat, beans, nuts and eggs
300
Which of the following statements about fossil fuels is FALSE? a. Examples of fossil fuels are coal, oil, and natural gas. b. Fossil fuels formed from plants that lived millions of years ago. c. Fossil fuels are being regenerated in the Earth at about the same rate they are being removed. d. The burning of fossil fuels by humans releases huge amounts of CO2 into the air.
c. Fossil fuels are being regenerated in the Earth at about the same rate they are being removed.
300
What is the function of guard cells in plant leaves? a. to control loss of sugar from the plant b. to control the movement of gasses and water vapor entering and exiting the plant c. to keep the cells from bursting when it rains too much d. they protect the plant from bees that rob the plant of all its wealth
b. to control the movement of gasses and water vapor entering and exiting the plant
400
7. Why is it so important to have large sample sizes in scientific experiments? a. Large sample sizes decrease the risk of sampling error. b. Large sample sizes are a better representation of the whole population. c. Large sample sizes are more likely to produce results that are statistically significant. d. all the above are true
d. all the above are true
400
What kind of bond holds separate water molecules to each other? a. ionic bond b. hydrogen bond c. covalent bond d. peptide bond
b. hydrogen bond
400
Which of the following substances help enzymes in carrying out the chemical reactions necessary to life? a. cholesterol b. codons c. free radicals d. vitamins
d. vitamins
400
Which of the following forms of energy is the only one your cells can use directly for building proteins? a. energy in carbohydrate chemical bonds b. energy in protein chemical bonds c. energy in fat chemical bonds d. energy in ATP chemical bonds
d. energy in ATP chemical bonds
400
Evidence indicates that the Earth's average temperature increases with an increase in the concentration of ... a. plants b. carbon dioxide c. nitrogen d. hydrogen gas
b. carbon dioxide
500
2. What is meant by a “double-blind” experiment? a. a study in which neither the experimenter nor the subject knows which treatment the subject is receiving b. a study in which only the experimenter knows which treatment the subject is receiving c. a study in which only the experimenter knows the hypothesis being tested d. a study in which each experimental group is unknowingly tested twice
a. a study in which neither the experimenter nor the subject knows which treatment the subject is receiving
500
A carbon atom has 6 protons, 6 electrons, and 6 neutrons. Why is the electrical charge of a carbon atom neutral? a. the number of neutrons equals the number of protons b. the number of electrons equals the number of neutrons c. the number of electrons equals the number of protons d. there are only two electrons in the valence shell
c. the number of electrons equals the number of protons
500
Which of the following is true of people with Type 1 diabetes? a. The disease begins in childhood. b. People with this disease can’t produce insulin. c. The disease is correlated with obesity. d. both a and b are true
d. both a and b are true
500
Which of the following is a true statement about carbon and the carbon cycle? a. There is a one-way flow of carbon from volcanoes to plants to herbivores to carnivores and, finally, to the atmosphere. b. Carbon dioxide (CO2) is the only carbon-containing compound involved in the carbon cycle. c. Carbon is recycled among plants, animals, water, soil, and the atmosphere. d. Carbon is recycled in a general sense, but once carbon dioxide is exhaled from animals, it can only enter the atmosphere, where it's trapped and adds to the greenhouse effect.
c. Carbon is recycled among plants, animals, water, soil, and the atmosphere.
500
According to Al Gore, what happens to Mr. Sunbeam when greenhouse gasses become too concentrated? a. Mr. Sunbeam gets blocked out b. Mr. Sunbeam gets hotter c. Mr. Sunbeam gets beat up and can't escape d. Mr. Sunbeam blinds everyone on Earth with his powerful UV rays
c. Mr. Sunbeam gets beat up and can't escape