Which of the following represents ways in which canned foods may undergo spoilage?
A. Leakage of contaminated water through can seams during cooling
B. Spoilage before canning
C. As a result of underprocessing during canning
D. All of the choices are correct.
Answer: D
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Which two nucleotides also serve as transporters of chemical energy?
a. ATP and GTP b. ATP and CTP c. ATP and TTP d. CTP and TTP e. CTP and UTP
Which type of hormone releases cyclic AMP as a second messenger?
a. peptide only b. steroid only c. protein only d. peptide and protein only e. peptide, steroid, and protein
Biochemically, a gene is BEST defined as a
a. unit of heredity. b. part of a chromosome. c. region of DNA that codes for protein assembly. d. portion of the nuclear chromatin. e. part of the material located in the nucleus.
The pigment that absorbs light energy (photons) in photosynthesis is
A) rubisco. B) chlorophyll. C) PEP. D) CAM.