Sign in
12thPass logo
New chatPYQ LibraryDoubtsRank report
Sign in to see Recents

Your guest activity stays on this device

Sign in to save progress →
Sign in

Biomolecules question

2025 · 28 Jan · Shift 2 · Q11
Guest · filters and generic practice availableBrowsing as a guest · PYQ filters and generic practice are available. Sign in only for personalised features and saved progress.
  1. PYQ Library
  2. /JEE Main
  3. /Chemistry
  4. /Biomolecules
  5. /2025 · 28 Jan · Shift 2 · Q11

Biomolecules question

2025 · 28 Jan · Shift 2 · Q11

JEE MainChemistryBiomoleculesMCQ+4 / −1
Identify correct conversion during acidic hydrolysis from the following : (A) starch gives galactose. (B) cane sugar gives equal amount of glucose and fructose. (C) milk sugar gives glucose and galactose. (D) amylopectin gives glucose and fructose. (E) amylose gives only glucose. Choose the correct answer from the options given below :
  1. A
    (A), (B) and (C) only
  2. B
    (B), (C) and (D) only
  3. C
    (B), (C) and (E) only
  4. D
    (C), (D) and (E) only
View written solutionFree

Correct answer: C

  1. Recall the products of acidic hydrolysis of the given carbohydrates

    • Starch is a polysaccharide made of α\alphaα-D-glucose units. Hence, on complete acidic hydrolysis, starch gives glucose, not galactose.

      So, (A) is false.

    • Cane sugar is sucrose. Sucrose on acidic hydrolysis gives: sucrose→acidic hydrolysisglucose+fructose\text{sucrose} \xrightarrow[\text{acidic hydrolysis}]{} \text{glucose} + \text{fructose}sucroseacidic hydrolysis​glucose+fructose in equal amounts.

      So, (B) is true.

    • Milk sugar is lactose. Lactose on hydrolysis gives: lactose→hydrolysisglucose+galactose\text{lactose} \xrightarrow[\text{hydrolysis}]{} \text{glucose} + \text{galactose}lactosehydrolysis​glucose+galactose

      So, (C) is true.

    • Amylopectin is a branched polymer of α\alphaα-D-glucose only. Therefore, hydrolysis gives only glucose, not fructose.

      So, (D) is false.

    • Amylose is a linear polymer of α\alphaα-D-glucose. Therefore, hydrolysis gives only glucose.

      So, (E) is true.

  2. Collect the correct statements

    Correct statements are: (B),(C),(E)(B), (C), (E)(B),(C),(E)

  3. Match with the options

    • Option A: (A),(B),(C)(A), (B), (C)(A),(B),(C) only ❌
    • Option B: (B),(C),(D)(B), (C), (D)(B),(C),(D) only ❌
    • Option C: (B),(C),(E)(B), (C), (E)(B),(C),(E) only ✅
    • Option D: (C),(D),(E)(C), (D), (E)(C),(D),(E) only ❌
  4. Final Answer

    The correct option is: C\boxed{\text{C}}C​

  5. Comparison with stored correct answer

    Stored correct answer = C

    My derived answer = C

    Hence, they agree.

PreviousNext

More from Biomolecules

  • Match List-I with List-II. Choose the correct answer from the options given below : Includes table2025 · MCQ
  • Match List - I with List - II. Choose the correct answer from the options given below : Includes table2025 · MCQ
  • Identify the essential amino acids from below: (A) Valine (B) Proline (C) Lysine (D) Threonine (E) Tyrosine Choose the correct answer from the options given below:2025 · MCQ
  • If one strand of a DNA has the sequence ATGCTTCA, sequence of the bases in complementary strand is :2024 · MCQ
  • The number of tripeptides formed by three different amino acids using each amino acid once is ​.2024 · Numerical
  • Which of the following is the correct structure of L-Glucose?2024 · MCQ
  • Match List I with List II Choose the correct answer from the options given below: Includes table2024 · MCQ
  • Which of the following gives a positive test with ninhydrin ?2024 · MCQ