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Bio 140 Review Questions with Verified Correct Answers

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Bio 140 Review Questions with Verified Correct Answers

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Bio 140 Review Questions with Verified Correct
Answers
Most predominant chemical in cells after water

Proteins

Building blocks of proteins

Amino acids

Average number of amino acids in a cell protein

400 amino acids

Four components attached to central carbon in an amino acid

Amino group, carboxyl group, hydrogen, and R group (side chain).

Number of common amino acids found in proteins

20 (each has a different side chain)

Chemical property of non-polar amino acid side chains

Composed mostly of C and H; do not dissolve well in water.

Chemical property of polar (uncharged) amino acid side chains

Contain polar covalent bonds (often O-H or N-H) creating a dipole moment.

Chemical property of electrically charged amino acid side chains

Feature acidic or basic groups that lose a hydrogen (acidic groups) or gain a hydrogen (basic

groups).

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