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Biomolecules (Biology) · Question 81

AIPMT 2005MCQEasy📈 Topic in 12% papers+4−1
1

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.

Answer

(1) some bacteria, algae and green plant cells

Solution

Carbohydrates are synthesised from CO2 and H2O by photosynthesis.

6CO2 + 12H2O Light C6H12O6 + 6O2 + 6H2O

∵ Photosynthesis is carried out by green plant cells, algae and some bacteria (cyanobacteria and other photosynthetic bacteria).

∵ Fungi are heterotrophs, viruses are non-cellular and most bacteria are heterotrophic, so they cannot produce carbohydrates.

∴ Carbohydrates are produced by some bacteria, algae and green plant cells.

Answer: (1)

AIPMT 2005

Keep practising — Biomolecules (Biology)

2

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
3

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
4

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

  1. Pepsin
  2. Invertase
  3. Idioblast
  4. Bacteriochlorophyll
AIPMT 2003
5

Lipids are insoluble in water because lipid molecules are

  1. hydrophilic
  2. hydrophobic
  3. neutral
  4. zwitterions.
AIPMT 2002
6

Which of the following is a reducing sugar?

  1. Galactose
  2. Gluconic acid
  3. -methyl galactoside
  4. Sucrose
AIPMT 2002
7

Collagen is:

  1. Globular protein
  2. Fibrous protein
  3. Carbohydrate
  4. Lipid
AIPMT 2002
8

Most abundant organic compound on earth is

  1. Cellulose
  2. Steroids
  3. Protein
  4. Lipids
AIPMT 2001
9

Spoilage of oil can be detected by which fatty acid?

  1. Linolenic acid
  2. Erucic acid
  3. Linoleic acid
  4. Oleic acid
AIPMT 2001
10

In plants, inulin and pectin are

  1. Excretory material
  2. Reserve material
  3. Insect attracting material
  4. Wastes
AIPMT 2001
11

Role of enzyme in reactions is to/as

  1. decrease activation energy
  2. increase activation energy
  3. inorganic catalyst
  4. none of the above.
AIPMT 2000

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