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Test: Primary & Secondary Metabolites - NEET MCQ


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10 Questions MCQ Test Biology Class 11 - Test: Primary & Secondary Metabolites

Test: Primary & Secondary Metabolites for NEET 2024 is part of Biology Class 11 preparation. The Test: Primary & Secondary Metabolites questions and answers have been prepared according to the NEET exam syllabus.The Test: Primary & Secondary Metabolites MCQs are made for NEET 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Primary & Secondary Metabolites below.
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Test: Primary & Secondary Metabolites - Question 1

Lecithin is a:

Detailed Solution for Test: Primary & Secondary Metabolites - Question 1

Lecithin is a type of phospholipid. Phospholipids are a class of lipids that are major components of cell membranes. They are composed of a hydrophilic (water-loving) head group and hydrophobic (water-fearing) fatty acid tails.

Test: Primary & Secondary Metabolites - Question 2

Select the odd one out from the following

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Alkaloids are secondary metabolites, where as rest are primary metabolites

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Test: Primary & Secondary Metabolites - Question 3

The most abundant  chemical in living organisms

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The most abundant chemical in living organisms is water.

Test: Primary & Secondary Metabolites - Question 4

Which of the following secondary metabolites is wrongly matched?

Detailed Solution for Test: Primary & Secondary Metabolites - Question 4

Pigments - Carotenoids,Anthocyanins
Toxins - Abrin, Ricin
Polymeric substance - Rubber, Gums
Alkaloids - Morphine, Codeine.

Test: Primary & Secondary Metabolites - Question 5

Most abundant protein in the whole of the biosphere

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Ribulose bisphosphate Carboxylase-Oxygenase (RuBisCO) is the most abundant protein in the whole of the biosphere.

Test: Primary & Secondary Metabolites - Question 6

Glycerides are

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Glycerides are a type of lipid compound composed of fatty acids that are esterified with glycerol. Glycerol is a trihydric alcohol. When fatty acids react with glycerol, they form ester bonds, resulting in the formation of glycerides.

Test: Primary & Secondary Metabolites - Question 7

Which of the following biomolecules are not strictly macromolecules?

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Macromolecules are giant molecules that are produced by the bonding of smaller molecules. Carbohydrates, lipids, proteins and nucleic acids are all considered to be macromolecules. 
A polysaccharide is one type of macromolecule made up of monosaccharides like glucose and fructose. 

Test: Primary & Secondary Metabolites - Question 8

From which of the following organisms do the enzymes maintain their catalytic power between 80°C - 90°C?

Detailed Solution for Test: Primary & Secondary Metabolites - Question 8

Enzymes isolated from organisms who normally live under extremely high temperatures (e.g. hot vents and sulphur springs) are stable and retain their catalytic power even at high temperatures (up to 80 - 90℃).

Test: Primary & Secondary Metabolites - Question 9

The R group in an amino acid is hydroxy methyl. The amino acid is

Detailed Solution for Test: Primary & Secondary Metabolites - Question 9

Explanation:

In amino acids, the "R group" refers to the side chain attached to the alpha carbon, which varies among different amino acids.

  • Serine has a hydroxy methyl group as its side chain (–CH₂OH).
  • Glycine has a hydrogen atom as its side chain (–H).
  • Valine has an isopropyl group as its side chain (–CH(CH₃)₂).
  • Alanine has a methyl group as its side chain (–CH₃).

Thus, the amino acid with a hydroxy methyl group as its R group is Serine.

Test: Primary & Secondary Metabolites - Question 10
What distinguishes cellulose from starch in terms of their polysaccharide structure?
Detailed Solution for Test: Primary & Secondary Metabolites - Question 10
Cellulose and starch are both polysaccharides composed of glucose units, but they differ significantly in their structural properties. Starch can form helical secondary structures which are capable of encapsulating iodine molecules, causing a blue coloration when starch is tested with iodine. This is a common test for the presence of starch in labs. Cellulose, on the other hand, does not form such helical structures and therefore cannot hold iodine molecules, not showing any blue color when tested with iodine.
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