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NEET UG Biomolecules — practice questions — page 2

Explore 57 free Biomolecules questions in NEET UG Chemistry. 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 31–57 of 57.

Pick the right answer, quicklyRead the answer and worked solution →Which carbohydrate does not fit the general formula Cx(H2O)y?Read the answer and worked solution →Which compound fits the formula Cx(H2O)y but is not a carbohydrate?Read the answer and worked solution →Why are polysaccharides also called non-sugars?Read the answer and worked solution →Bromine water oxidises glucose to gluconic acid. This shows glucose hasRead the answer and worked solution →Nitric acid oxidises glucose to saccharic acid. This revealsRead the answer and worked solution →What is the melting point of the α-form of glucose?Read the answer and worked solution →The OH group on which carbon of glucose forms its six-membered ring?Read the answer and worked solution →The α and β anomers of glucose differ in configuration at which carbon?Read the answer and worked solution →In fructose, the ketonic group is present at which carbon number?Read the answer and worked solution →In sucrose, the glycosidic bond joins which carbon atoms?Read the answer and worked solution →Invert sugar is laevorotatory because fructose has a specific rotation ofRead the answer and worked solution →Branching in amylopectin occurs through which linkage?Read the answer and worked solution →Glycogen is called animal starch because its structure resemblesRead the answer and worked solution →The amino acid glycine is named after which property?Read the answer and worked solution →Which of these is a globular protein?Read the answer and worked solution →In an α-helix, the polypeptide chain twists into aRead the answer and worked solution →The original term vitamine joined the word vital withRead the answer and worked solution →Which water soluble vitamin can be stored in the human body?Read the answer and worked solution →A nucleoside forms when a base attaches to which position of the sugar?Read the answer and worked solution →In which year did Har Gobind Khorana share the Nobel Prize?Read the answer and worked solution →Who shared the 1962 Nobel prize with Watson and Crick for DNA structure?Read the answer and worked solution →Thyroxine is an iodinated derivative of which amino acid?Read the answer and worked solution →Which hormone tends to raise the glucose level in blood?Read the answer and worked solution →Which adrenal cortex hormones control water and salt excretion by the kidney?Read the answer and worked solution →D and L notation in sugars relates configuration to which compound?Read the answer and worked solution →Which fact about glucose cannot be explained by its open chain structure?Read the answer and worked solution →

Worked practice questions

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Questions
  1. Question
    Amylose is about what share of starch?
    Choices
    1. 15 to 20 per cent
    2. 45 to 50 per cent
    3. 80 to 85 per cent
    Correct choice
    15 to 20 per cent
  2. Question
    Starch is hydrolysed to glucose at:
    Choices
    1. 193 K
    2. 293 K
    3. 393 K
    Correct choice
    393 K
  3. Question
    A ring of five carbons and one oxygen is:
    Choices
    1. Furanose
    2. Pyranose
    3. Purine
    Correct choice
    Pyranose
  4. Question
    Cytosine pairs with:
    Choices
    1. Guanine
    2. Adenine
    3. Thymine
    Correct choice
    Guanine
  5. Question
    An enzyme name usually ends in:
    Choices
    1. ose
    2. ase
    3. ide
    Correct choice
    ase
Instructions
Tap the correct answer before the round moves on.
_Source: syllabus Chemistry Part 2, Unit 10 'Biomolecules'_

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Which carbohydrate does not fit the general formula Cx(H2O)y?

  1. Rhamnose
  2. Glucose
  3. Fructose
  4. Sucrose
Show answer and solution

Correct answer: A. Rhamnose

Rhamnose has the formula C6H12O5, which cannot be written as a carbon hydrate, yet it is a carbohydrate.

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Which compound fits the formula Cx(H2O)y but is not a carbohydrate?

  1. Acetic acid
  2. Lactose
  3. Ribose
  4. Maltose
Show answer and solution

Correct answer: A. Acetic acid

Acetic acid, CH3COOH, can be written as C2(H2O)2 but is not a polyhydroxy aldehyde or ketone.

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More Chemistry topics

Amines and BiomoleculesChemical KineticsAldehydes, Ketones and Carboxylic AcidsEquilibriumRedox ReactionsHydrocarbonsChemical Bonding and Molecular StructureSolutions