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BIOLOGY HOW LIFE WORKS 4TH EDITION ACTUAL EXAM PAPER 2026 QUESTIONS WITH SOLUTIONS GRADED A+

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BIOLOGY HOW LIFE WORKS 4TH EDITION ACTUAL EXAM PAPER 2026 QUESTIONS WITH SOLUTIONS GRADED A+

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BIOLOGY HOW LIFE WORKS 4TH EDITION
ACTUAL EXAM PAPER 2026 QUESTIONS WITH
SOLUTIONS GRADED A+


◉ structure of amino acid. Answer: alpha carbon attached to amino
group, carboxyl group, R group/side chain, and a hydrogen atom


◉ alpha carbon. Answer: central carbon atom


◉ amino acid forms a... (shape). Answer: tetrahedron


◉ What differs amino acids from one another?. Answer: R groups


◉ Most hydrophobic amino acids have.... Answer: nonpolar R groups,
electrons shared equally


◉ Amino acids with polar R groups have.... Answer: a permanent charge
difference, hydrophillic


◉ R groups of basic and acidic amino acids are typically.... Answer:
charged and polar, R groups usually located on outside of fold

, ◉ peptide bond. Answer: formed between two amino acids, interaction
between carboxyl group and amino group, water is released


◉ carbonyl group. Answer: C=O


◉ N-H group. Answer: amide group


◉ amino end. Answer: has a free amino group


◉ carboxyl end. Answer: has a free carboxyl group


◉ polypeptide. Answer: A PROTEIN, polymer of amino acids connected
by peptide bonds


◉ primary structure. Answer: sequence of amino acids


◉ secondary structure. Answer: interactions between stretches of amino
acids


◉ tertiary structure. Answer: three-dimensional shape of polypeptide

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