Tomato juice has a pH of 4; therefore, it is considered a(n) ____________________.
Fill in the blank(s) with correct word
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Question 2) With regard to pH levels, ____________________ maintain homeostasis within cells.
Fill in the blank(s) with correct word
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Question 3) The most abundant substance in living cells is ____________________.
Fill in the blank(s) with correct word
(
Question 4) The science that deals with the elements, their compounds, and the chemical reactions that occur between elements and compounds is known as ____________________.
Fill in the blank(s) with correct word
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Question 5) Fats, phospholipids, and steroids are all examples of ____________________.
Fill in the blank(s) with correct word
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Question 6) DNA and RNA are examples of ____.
a. proteins
b. lipids
c. nucleic acids
d. carbohydrates
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Question 7) Which type of chemical bond holds water molecules together by forming a bridge between the negative oxygen atom of one water molecule and the positive hydrogen atoms of another water molecule?
a. isotopic
b. hydrogen
c. ionic
d. covalent
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Question 8) The ____ structure of proteins is determined by the hydrogen bonds between amino acids that cause the protein to coil into helices or pleated sheets.
a. secondary
b. tertiary
c. primary
d. quaternary
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Question 9) What kind of bonds do the mineral salts form?
a. hydrogen
b. ionic
c. covalent
d. isotopic
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Question 10) Distilled water has a pH of 7 and is therefore ____.
a. acidic
b. basic
c. neutral
d. ionic
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