The double helix is a structure associated with:
A) disaccharides
B) a compound with hydrogen bonds
C) lipids
D) DNA
Correct Answer:
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Q12: The total of protons in an atom
Q13: Chemical reactions occur:
A)between elements that have magnetic
Q14: When proteins are made up of several
Q15: In salt,a sodium atom loses an electron
Q16: The atomic nucleus consists of:
A)cations and anions
B)protons,electrons
Q18: When sodium hydroxide,a strong base,is added to
Q19: The three fundamental particles of the atom
Q20: Food consists of molecules with lots of
Q21: The pH scale is used to specify
Q22: Which statement about acids and bases is
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