Question and answer
What is a catalyst defined as? A. a substance that speeds up a reaction only B. a substance that speeds up a reaction, and is not used up C. a substance that speeds up a reaction, and is completely used up D. a substance that slows down a reaction, and is completely used up
A catalyst is defined as a substance that speeds up a reaction, and is not used up .
Expert answered|Tachek|Points 60|
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Asked 6/12/2013 7:30:42 AM
Updated 4/14/2014 12:24:44 PM
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This answer has been confirmed as correct and helpful.
Edited by andrewpallarca [4/14/2014 12:24:43 PM], Confirmed by andrewpallarca [4/14/2014 12:24:44 PM]
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What does the mood of a poem refer to? A. feeling B. stress C. rhyme D. rhythm
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The mood of a poem refers to feeling.
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What is the useful product of glycolysis for the cell? A. NAD B. pyruvate C. lactic acid D. ethyl alcohol
Weegy: Pyruvate is the useful product of glycolysis for the cell. (More)
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What do eukaryote cells have that prokaryotes do not have? A. DNA B. ribosomes C. cell membranes D. membrane-bound nucleus
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Updated 11/29/2016 12:39:11 PM
1 Answer/Comment
Eukaryote cells have membrane-bound nucleus that prokaryotes do not have.
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Which form of cell transport allows small molecules to move from an area of higher concentration to an area of lower concentration without energy being required from the cell? A. osmosis B. pinocytosis C. phagocytosis D. simple diffusion
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Updated 8/11/2015 6:56:41 PM
1 Answer/Comment
Simple diffusion allows small molecules to move from an area of higher concentration to an area of lower concentration without energy being required from the cell.
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Confirmed by jeifunk [8/12/2015 1:31:38 AM]
A group of organs that work together to perform a closely related function is called a(n) A. organ system. B. organism. C. tissue. D. cell.
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Updated 5/21/2014 10:11:44 AM
1 Answer/Comment
A group of organs that work together to perform a closely related function is called an organ system.
Added 5/21/2014 10:11:43 AM
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