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Biomolecules · Question 55

AIPMT 2002MCQEasy📈 Topic in 12% papers+4−1
1

Enzymes are made up of

  1. edible proteins
  2. proteins with specific structure
  3. nitrogen containing carbohydrates
  4. carbohydrates

Answer

(2) proteins with specific structure

Solution

As per NCERT, enzymes are biocatalysts and almost all enzymes are globular proteins.

Each enzyme has a specific three-dimensional structure (active site), which makes it specific for a particular reaction or substrate.

∴ Enzymes are made up of proteins with specific structure.

Answer: (2)

AIPMT 2002

Keep practising — Biomolecules

2

Which is not a true statement?

  1. -carbon of -amino acid is asymmetric
  2. All proteins are found in L-form
  3. Human body can synthesise all proteins it needs
  4. At pH = 7, both amino and carboxylic groups exist in ionised form
AIPMT 2002
3

Cellulose is polymer of

  1. glucose
  2. fructose
  3. ribose
  4. sucrose
Out of syllabusAIPMT 2002
4

Which of the following give positive Fehling solution test?

  1. Sucrose
  2. Glucose
  3. Fats
  4. Protein
AIPMT 2001
5

Which of the following is correct about H-bonding in nucleotide?

  1. A-T, G-C
  2. A-G, T-C
  3. G-T, A-C
  4. A-A, T-T
AIPMT 2001
6

Which of the following is correct?

  1. Cycloheptane is an aromatic compound.
  2. Diastase is an enzyme
  3. Acetophenone is an ether.
  4. All of these.
AIPMT 2001
7

Which is the correct statement?

  1. Starch is a polymer of -glucose.
  2. Amylose is a component of cellulose.
  3. Proteins are composed of only one type of amino acid.
  4. In cyclic structure of fructose, there are four carbons and one oxygen atom.
AIPMT 2001
8

[figure] Which statement is incorrect about peptide bond?

  1. C-N bond length in proteins is longer than usual bond length of N-C bond.
  2. Spectroscopic analysis shows planar structure of [figure] group.
  3. C-N bond length in proteins is smaller than usual bond length of C-N bond.
  4. None of the above.
AIPMT 2001
9

-D-glucose and -D-glucose are

  1. epimers
  2. anomers
  3. enantiomers
  4. diastereomers
AIPMT 2000
10

Which one is responsible for production of energy in bio-reaction?

  1. Thyroxine
  2. Adrenaline
  3. Oestrogen
  4. Progesterone
AIPMT 2000
11

How do enzymes increase the rate of reactions?

  1. by lowering activation energy
  2. by increasing activation energy
  3. by changing equilibrium constant
  4. by forming enzyme substrate complex.
AIPMT 2000

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