The order of amino acids is the ____ structure of proteins.
A. primary
B. secondary
C. tertiary
D. quaternary
E. stereo
Answer: A
Biology & Microbiology
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Modern day birds are most closely related to which of the following?
A. mammals B. dinosaurs C. amphibians D. lungfish
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Four of the five answers listed below are features of the lac operon. Select the exception
a. repressor b. terminator c. operator d. promoter e. genes
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Chemicals in tobacco smoke can cause _____
a. DNA to break into pieces. b. mispairing of bases. c. kinking in the DNA molecule. d. the formation of nucleotide dimers. e. covalent bonding between adjacent adenine bases.
Biology & Microbiology
The effect of directional growth shown in the above
figure is known to be caused by a. thigmotropism. b. gravitropism. c. abscisic acid. d. salicylic acid. e. all of these.
Biology & Microbiology