Ethylene stimulates the ripening of fruits. Indicate whether the statement is true or false
True
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Compare the molecular formula of a carbohydrate (CH2O)n with that of carbon dioxide (CO2). What does the presence of hydrogen atoms in carbohydrates indicate?
A) Carbohydrates are more reduced than carbon dioxide. B) Carbohydrates are more oxidized than carbon dioxide. C) Every carbon atom in a carbohydrate is bonded to four different atoms. D) Carbohydrates contain a carbonyl functional group.
Which of the following are magnifying lenses?
A) objectives B) oculars C) condensers D) prisms E) both objectives and the oculars
To attach a particular amino acid to the tRNA molecule that will transport it, an enzyme, an aminoacyl-tRNA synthetase, is required, along with ATP. Initially, the enzyme has an active site for ATP and another for the amino acid
, but it is not able to attach the tRNA. What must occur for the final attachment to occur? A) The ATP must first have to attach to the tRNA. B) The binding of the first two molecules must cause a 3-D change that opens another active site on the enzyme. C) The ATP must be hydrolyzed to allow the amino acid to bind to the synthetase. D) The tRNA molecule must alter its shape to be able to fit into the active site with the other two molecules. E) The end of the tRNA must be cleaved before it can have an attached amino acid.
A spontaneous process can occur with a large decrease in entropy.
Indicate whether the statement is true or false.