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Rajasthan Board Class 12 (RBSE) Biomolecules — practice questions

Explore 7 free Biomolecules questions in Rajasthan Board Class 12 (RBSE) Biology. Open each question or exercise to read its content, reference answers and available explanation.

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Biomolecules questions and exercises with answers

Showing questions 1–7 of 7.

Complete the definition of an amino acidRead the answer and worked solution →True or false: amino acidsRead the answer and worked solution →Reading the definitionsRead the answer and worked solution →Which part of the amino acid?Read the answer and worked solution →Assertion and reasonRead the answer and worked solution →Flip and pair: term with meaningRead the answer and worked solution →Spot the one that does not belongRead the answer and worked solution →

Worked practice questions

Complete the definition of an amino acid

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Missing parts
  1. Answer
    amino
    Choices
    1. amino
    2. hydroxyl
    3. methyl
  2. Answer
    acidic
    Choices
    1. acidic
    2. basic
    3. neutral
  3. Answer
    α
    Choices
    1. α
    2. β
    3. γ
Complete the statement
Amino acids are organic compounds carrying an {0} group and an {1} group as substituents on the same carbon, the {2}-carbon.
The two groups sit on the same carbon, which is why they are called alpha. Source: syllabus Biology, Ch 9 Biomolecules.

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True or false: amino acids

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Questions
  1. Statement is true
    Yes
    Statement
    Amino acids carry both an amino and an acidic group.
  2. Statement is true
    Yes
    Statement
    Both groups sit on the same carbon in an α-amino acid.
  3. Statement is true
    Yes
    Statement
    Only twenty amino acids occur in proteins.
  4. Statement is true
    No
    Statement
    Every known amino acid occurs in proteins.
  5. Statement is true
    Yes
    Statement
    Amino acids are described as substituted methanes.
Only twenty of the many possible ones occur in proteins. Source: syllabus Biology, Ch 9 Biomolecules.

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Reading the definitions

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Questions
  1. Question
    The carbon carrying both groups is called the
    Choices
    1. β-carbon
    2. α-carbon
    3. γ-carbon
    Correct choice
    α-carbon
  2. Question
    How many amino acids occur in proteins?
    Choices
    1. ten
    2. a hundred
    3. twenty
    Correct choice
    twenty
  3. Question
    An amino acid's properties come from the amino, carboxyl and
    Choices
    1. R group
    2. phosphate group
    3. sugar
    Correct choice
    R group
  4. Question
    Amino acids are structurally described as substituted
    Choices
    1. benzenes
    2. methanes
    3. alcohols
    Correct choice
    methanes
Structure first, then which ones matter biologically. Source: syllabus Biology, Ch 9 Biomolecules.

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