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Biomolecules (Biology) · Question 78

AIPMT 2005MCQEasy📈 Topic in 0% papers+4−1
1

Enzymes, vitamins and hormones can be classified into a single category of biological chemicals, because all of these

  1. help in regulating metabolism
  2. are exclusively synthesized in the body of a living organism as at present
  3. are conjugated proteins
  4. enhance oxidative metabolism.

Answer

(1) help in regulating metabolism

Solution

Enzymes catalyse metabolic reactions, many vitamins act as coenzymes (or their precursors), and hormones control the rate of metabolic activities.

⇒ The common feature of all three is that they help in regulating metabolism.

∵ Vitamins are mostly not synthesised in the body, many hormones (steroids, amines) are not proteins, and not all of them enhance oxidative metabolism.

Answer: (1)

AIPMT 2005

Keep practising — Biomolecules (Biology)

2

Which of the following is the simplest amino acid?

  1. Alanine
  2. Asparagine
  3. Glycine
  4. Tyrosine
AIPMT 2005
3

Nucleotides are building blocks of nucleic acids. Each nucleotide is a composite molecule formed by

  1. base-sugar-phosphate
  2. base-sugar-OH
  3. (base-sugar-phosphate)n
  4. sugar-phosphate
AIPMT 2005
4

Carbohydrates, the most abundant biomolecule on earth, are produced by

  1. some bacteria, algae and green plant cells
  2. fungi, algae and green plant cells
  3. all bacteria, fungi and algae
  4. viruses, fungi and bacteria.
AIPMT 2005
5

With which one of the following enzymes is copper necessarily associated as an activator?

  1. Carbonic anhydrase
  2. Tryptophanase
  3. Lactic dehydrogenase
  4. Tyrosinase
AIPMT 2004
6

The major role of minor elements inside living organisms is to act as

  1. co-factors of enzymes
  2. building blocks of important amino acids
  3. constituent of hormones
  4. binder of cell structure.
AIPMT 2003
7

In which one of the following nitrogen is not a constituent ?

  1. Pepsin
  2. Invertase
  3. Idioblast
  4. Bacteriochlorophyll
AIPMT 2003
8

Lipids are insoluble in water because lipid molecules are

  1. hydrophilic
  2. hydrophobic
  3. neutral
  4. zwitterions.
AIPMT 2002
9

Which of the following is a reducing sugar?

  1. Galactose
  2. Gluconic acid
  3. -methyl galactoside
  4. Sucrose
AIPMT 2002
10

Collagen is:

  1. Globular protein
  2. Fibrous protein
  3. Carbohydrate
  4. Lipid
AIPMT 2002
11

Most abundant organic compound on earth is

  1. Cellulose
  2. Steroids
  3. Protein
  4. Lipids
AIPMT 2001

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