Chemical Compounds In Cells: Question Preview (ID: 20697)

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A type of protein that speeds up a chemical reaction______
a) molecule b) compound c) enzyme d) DNA
_____________ is a process that helps move water and solutes into and out of our cells.
a) photosynthesis b) respiration c) osmosis d) active transport
The smallest unit of an element is a__________
a) molecule b) compound c) chemical d) proton
Approximately how much of our bodies are made of water?
a) 1/3 b) 2/3 c) 1/2 d) 99%
RNA plays a role in the production of ___________.
a) fats b) carbohydrates c) proteins d) DNA
True or False? DNA plays a role in heredity.
a) Frue b) Tralse c) False d) True
____________ ____________ are very lare organic molecules that are made up of carbon, oxygen, nitrogen, phosphorous, hydrogen
a) reaction enzymes b) hydroxi nucleic acids c) Nucleic Acids d) restriction enzymes
How many amino acids can combine in different ways to make proteins?
a) 10 b) 15 c) 18 d) 20
A_________is a protein that speeds up a chemical reaction
a) lipid b) enzyme c) fat d) carbohydrate
Carbohydrates contain:
a) carbon - hydrogen-oxygen b) hydrogen-sulfur-oxygen c) carbon- sulfur-oxygen d) carbon-oxygen-phosphorous
True or False: Lipids are energy rich molecules
a) True b) False c) d)
Large molecules made of combinations of amino acids are called:
a) carbohydrates b) lipids c) proteins d) nucleic acid
Proteins are made up of carbon, hydrogen, oxygen, nitrogen and sometimes:
a) sulfur b) kryptonite c) hydrogen peroxide d) argon
What type of molecules always contain carbon?
a) inorganic b) salts c) organic d) none of the above
True or False: Inorganic molecules do not contain carbon.
a) True b) False c) d)
This is created when 2 or more elements are combined
a) compound b) atom c) proton d) electron
Any substance that can not be broken down into a simpler substance.....
a) compound b) protein c) carbohydrate d) element
This molecule plays a role in the production of proteins and is found in the nucleolus
a) atom b) DNA c) fats d) RNA
With out________most chemical reactions can not occur.
a) fats b) water c) salts d) pepper
Cells need energy to sustain life
a) false b) True c) Frue d) tralse
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