Which of the following does NOT characterize proteins?
A) Their function depends on their three-dimensional shape.
B) They may be denatured or coagulated by heat or acidity.
C) They appear to be the molecular carriers of coded hereditary information.
D) They have both functional and structural roles in the body.
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Question 2) Protons and electrons exist in every atom nucleus except hydrogen. Is this statement true or false and why?
What will be an ideal response
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Question 3) What does CH4 mean?
A) This is an inorganic molecule.
B) This was involved in a redox reaction.
C) There is one carbon and four hydrogen atoms.
D) There are four carbon and four hydrogen atoms.
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Question 4) An atom with an atomic number of 10 and a mass number of 24 would have ________.
A) 14 electrons
B) 14 neutrons
C) 24 protons
D) 10 neutrons
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Question 5) The genetic information is coded in DNA by the ________.
A) sequence of the nucleotides
B) three-dimensional structure of the double helix
C) arrangement of the histones
D) regular alteration of sugar and phosphate molecules
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Question 6) Which of the following is chemically inert (unreactive)?
A) carbon (atomic number 6)
B) oxygen (atomic number 8)
C) neon (atomic number 10)
D) sodium (atomic number 11)
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Question 7) What is a dipole?
A) a polar molecule
B) an organic molecule
C) a type of reaction
D) a type of bond
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Question 8) In general, the lipids that we refer to as oils have ________.
A) long fatty acid chains
B) a high water content
C) unsaturated fatty acids
D) saturated fatty acids
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Question 9) The chemical symbol O=O means ________.
A) the atoms are double bonded
B) both atoms are bonded and have zero electrons in the outer orbit
C) zero equals zero
D) this is an ionic bond with two shared electrons
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Question 10) The basic structural material of the body consists of ________.
A) proteins
B) lipids
C) nucleic acids
D) carbohydrates
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