Chapter 2 Section 3 Review Questions
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Proteins are large, organic molecules formed by joining together
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Fats
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Carbohydrates
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Amino acids
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Simple sugars
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Use this quiz as a review for exam 3. Exam 3 includes material from ALL of chapter 2 (sections 1 through 4).
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- 2.
A protein that acts as a biological catalyst is a(n)
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Enzyme
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Fat
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Hormone
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Simple sugar
Correct Answer
A. EnzymeExplanation
Enzymes are proteins that act as biological catalysts, meaning they speed up chemical reactions in living organisms. They do this by lowering the activation energy required for a reaction to occur, allowing it to happen more quickly. Enzymes are highly specific, meaning they only catalyze specific reactions. They are not fats, hormones, or simple sugars, which have different functions in the body. Therefore, the correct answer is enzyme.Rate this question:
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- 3.
Which formula on page 57 of the text represents an amino acid?
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Formula A
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Formula B
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Formula C
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Formula D
Correct Answer
A. Formula C -
- 4.
Which is NOT an organic molecule found in living organisms?
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Protein
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Sugar
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Water
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Carbohydrate
Correct Answer
A. WaterExplanation
Water is not considered an organic molecule because it does not contain carbon. Organic molecules are defined as compounds that contain carbon and hydrogen atoms bonded together in a specific way. Water, on the other hand, consists of hydrogen and oxygen atoms, making it an inorganic molecule. Despite being essential for life, water is not classified as an organic molecule.Rate this question:
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- 5.
Examples of large complex molecules formed by joining together many small molecules include
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Proteins and amino acids
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Carbohydrates and monosaccharides
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DNA and proteins
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Mitochondria and vacuoles
Correct Answer
A. DNA and proteinsExplanation
DNA and proteins are examples of large complex molecules formed by joining together many small molecules. DNA is composed of nucleotides, which are small molecules consisting of a sugar, a phosphate group, and a nitrogenous base. These nucleotides are joined together through phosphodiester bonds to form a long strand of DNA. Proteins, on the other hand, are composed of amino acids, which are small molecules consisting of an amino group, a carboxyl group, and a side chain. Amino acids are joined together through peptide bonds to form a polypeptide chain, which then folds into a functional protein.Rate this question:
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- 6.
Which type of molecule is represented by formula D on page 57 in the text?
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Amino acid
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Monosaccharide
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Disaccharide
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Protein
Correct Answer
A. DisaccharideExplanation
The correct answer is disaccharide. This means that the molecule represented by formula D on page 57 in the text is a disaccharide.Rate this question:
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- 7.
Which class period are you in?
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1
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4
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7
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8
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- 8.
In living organisms, the millions of organic compounds are classified into groups. For example, lipids are a large and varied group of organic compounds that include fats, oils, and waxes. Name three other groups of organic compounds. Describe the compounds and their monomers, and explain why each group of compounds is important. Give examples of each
Quiz Review Timeline (Updated): Mar 20, 2023 +
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Mar 20, 2023Quiz Edited by
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Oct 02, 2011Quiz Created by
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