Levels Tought:
Elementary,Middle School,High School,College,University,PHD
Teaching Since: | Apr 2017 |
Last Sign in: | 236 Weeks Ago, 4 Days Ago |
Questions Answered: | 12843 |
Tutorials Posted: | 12834 |
MBA, Ph.D in Management
Harvard university
Feb-1997 - Aug-2003
Professor
Strayer University
Jan-2007 - Present
In which of the following steps of glucose metabolism is the greatest number of ATP molecules produced?
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Question 4 options:
The Citric Acid Cycle
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Glycolysis
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Chemiosmosis
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Alcohol Fermentation
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SaveQuestion 5Â (5 points)
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Where does glycolysis take place in eukaryotic cells?
Question 5 options:
cytoplasm
mitochondrial matrix
mitochondrial inner membrane
chloroplast
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Plant cells produce one molecule of O2Â ____.
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Question 6 options:
by splitting carbon dioxide.
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by splitting two molecules of water.
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during cellular respiration.
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by breaking down glucose.
SaveQuestion 7Â (5 points)
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Plants manufacture glucose _______
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Question 7 options:
for exclusive use by animals.
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to function as the beginning of more complex molecules.
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as a by-product produced as the plant manufactures oxygen.
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during cellular respiration.
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SaveQuestion 8Â (5 points)
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CO2Â + H2O + light energy --> C6H12O6Â + O2
In the chemical reaction above, what does C6H12O6represent?
Question 8 options:
A water moleculeÂ
A chlorophyll pigment
An oxygen moleculeÂ
A simple carbohydrate
SaveQuestion 9Â (5 points)
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In which reaction is CO2Â required?Â
Question 9 options:
The light reaction
Neither the light reaction nor the Calvin cycle.
The Calvin cycle
In both the light reaction and the Calvin cycle
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Plant cells ______.
Question 10 options:
do not have chloroplasts because their mitochondria meet their energy needs.
use carbon dioxide but do not use oxygen.
have both chloroplasts and mitochondria.
do not have mitochondria because their chloroplasts meet their energy needs.
SaveQuestion 11Â (5 points)
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You are playing a long tennis match and your muscles begin to switch to anaerobic respiration. Which of the following is NOT true?
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Question 11 options:
Your cells start converting NAD+Â to NADH.
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Lactic acid is produced.
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There is a lack of oxygen in your muscle cells.
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ATP production declines.
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In fermentation,Â
Question 12 options:
NADH is produced
O2Â is produced
NADP+Â is produced.
O2Â is used.
SaveQuestion 13Â (5 points)
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According to the first law of thermodynamics, the total amount of energy in the universe ___________.
Question 13 options:
is always decreasing
is constant
varies up and down
is always increasing
SaveQuestion 14Â (5 points)
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How do cells use the ATP cycle shown in the figure above?
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Question 14 options:
Cells use the cycle primarily to generate heat.
Cells use the cycle to generate or consume water molecules as needed.
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Cells use the cycle to recycle energy released by ATP hydrolysis.
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Cells use the cycle to recycle ADP and phosphate.
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Question 15Â (5 points)
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Where are the proteins of the electron transport chain located?
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Question 15 options:
Mitochondrial matrix
Mitochondrial outer membrane
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Cytosol
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Mitochondrial inner membrane
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SaveQuestion 16Â (5 points)
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Energy that is not converted to useful energy (ability to do work) is usually given off as____.Â
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Question 16 options:
heat
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light
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electricity
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radioactivity
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SaveQuestion 17Â (5 points)
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Energy ______
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Question 17 options:
cannot be produced by fungi and heterotrophic organisms.
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involves ATP in living organisms.
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is the ability to do work.
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usage is governed by the laws of thermodynamics.
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all of these
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Question 18Â (5 points)
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Why is adenosine triphosphate (ATP) important in cells?
Question 18 options:
It is assembled into long chains that make up cell membranes.
It accelerates diffusion.Â
It stores energy in an easily accessible form that can be used to do work.
It acts as an enzyme speeding up chemical reactions.Â
SaveQuestion 19Â (5 points)
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Why are enzymes important to humans?
Question 19 options:
Because they are proteins.
Because they can evade the laws of thermodynamics.
Because they allow reactions to occur at body temperature.
Because they increase body temperature.
SaveQuestion 20Â (5 points)
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Which of the following statements is true?
Question 20 options:
An enzyme's function depends on its three-dimensional shape.
Enzymes typically work on a broad range of substrates.
Enzymes are used up in chemical reactions.
Enzymes emerge changed from the reactions they catalyze.
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