Protein -- A Macromolecule

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Chemistry Quizzes & Trivia

Basic information about proteins. (9th grade biology)


Questions and Answers
  • 1. 

    What elements are found in all proteins?

    • A.

      C, H, O, only

    • B.

      C, H, O and N

    • C.

      C, H, O, P

    • D.

      C, H, O, S

    Correct Answer
    B. C, H, O and N
    Explanation
    C, H, O (Carbon, Hydrogen and Oxygen) are in all Carbohydrates and Lipids.
    Proteins need: C, H, O and Nitrogen (N) for all monomers of proteins.

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  • 2. 

    What is a name for a monomer of protein?

    • A.

      Polypeptide

    • B.

      Monoscaccharide

    • C.

      Fatty acid

    • D.

      Amino acid

    Correct Answer
    D. Amino acid
    Explanation
    Amino acids are the building blocks (monomers) of proteins.
    Monosaccharides are the building blocks of carbohydrates.

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  • 3. 

    This is a basic pattern of an amino acid. What does portion A represent?

    • A.

      Carboxylic acid portion

    • B.

      Variable portion

    • C.

      Amine portion

    Correct Answer
    C. Amine portion
    Explanation
    Portion A in the basic pattern of an amino acid represents the amine portion. This portion consists of an amino group (-NH2) which is attached to the central carbon atom of the amino acid. The amine portion is responsible for the basic properties of amino acids and plays a crucial role in protein synthesis and structure. It is involved in forming peptide bonds with other amino acids, contributing to the formation of proteins.

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  • 4. 

    Which of the following is TRUE?

    • A.

      The sequence of amino acids makes up the primary shape. The polypeptide chains fold into 3-dimensional shapes that make up various structures.

    • B.

      The amino acids primary shape is a 3-D structure.

    • C.

      Carbohydrates form polypeptide chains.

    • D.

      Proteins are flat structures. 

    Correct Answer
    A. The sequence of amino acids makes up the primary shape. The polypeptide chains fold into 3-dimensional shapes that make up various structures.
    Explanation
    The sequence of amino acids makes up the primary shape. The polypeptide chains fold into 3-dimensional shapes that make up various structures.

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  • 5. 

    In the lab, how do you test for proteins

    • A.

      Benedict's test

    • B.

      Iodine test

    • C.

      Paper bag/oily test

    • D.

      Biuret Test

    Correct Answer
    D. Biuret Test
    Explanation
    Benedict's tests for simple sugars - example: glucose. Iodine tests for starches. Paper bag (looking for oily stain) is for fats.
    Biuret test is for proteins. A positive test will turn the solution from blue to purple.

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  • 6. 

    Which of the following is NOT made up primarily of proteins?

    • A.

      Cellulose

    • B.

      Enzymes

    • C.

      Bones and Muscles

    • D.

      Transport molecules (including Hemoglobin)

    Correct Answer
    A. Cellulose
    Explanation
    Proteins make up most structures in a living organism. Proteins make up enzymes, collagen, bones, transport molecules, bone and muscle. Cellulose -- which helps to give the plants structure is a polysaccharide -- a chain of glucose molecules. It is NOT a protein.

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  • Current Version
  • Mar 21, 2023
    Quiz Edited by
    ProProfs Editorial Team
  • May 03, 2019
    Quiz Created by
    Kwchiro
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