Engineering Questions with Answers - Multiple Choice Questions
MCQs on Plant Secondary Metabolites
1 - Question
Metabolic intermediates found in living system which are essential for growth and life is called___________
a) Saponins
b) Tannins
c) Secondary metabolite
d) Primary metabolites
View Answer
Answer: d
Explanation: Primary metabolites are the essential metabolic intermediates of the plants which help in the growth and development of the plant.
2 - Question
Secondary metabolites are the essential component of the plant growth.
a) True
b) False
View Answer
Answer: b
Explanation: Primary metabolites are essential for plant growth while secondary metabolite is non-essential components of plant growth.
3 - Question
Which of the following is NOT the class of secondary metabolite.
a) Amino acids
b) Terpenes
c) Phenolics
d) Alkaloids
View Answer
Answer: a
Explanation: Amino acids are the example of primary metabolites. Plants secondary metabolites have been divided into four classes, i.e., phenolics, terpenes, glycosides, and alkaloids.
4 - Question
How many isoprene units, are there in sesquiterpenes?
a) 1
b) 2
c) 3
d) 8
View Answer
Answer: c
Explanation: Terpens has been classified on the basis of the number of isoprene units present in its structure. Sesquiterpenes composed of 3 isoprene units.
5 - Question
Which of the following does NOT take part in the biosynthesis of terpenes?
a) Mevalonic acid
b) Methylerythritol phosphate
c) Acetyl-COA
d) Phenol
View Answer
Answer: d
Explanation: Biosynthesis of terpenes takes place by two pathways, i.e., mevalonic acid pathway and MEP pathway. Phenol does not take part in the synthesis of terpenes.
6 - Question
. Beta-carotene, a plant pigment falls under which of the following classes of terpenes?
a) Triterpenes
b) Teteraterpenes
c) Diterpenes
d) Polyterpenes
View Answer
Answer: b
Explanation: Tetraterpenes consists of four isoprene units. Beta-carotene is a plant pigment which is responsible for red, yellow, and orange color.
7 - Question
Name the class of secondary metabolites which is characterized by the presence of the hydroxyl group with an aromatic ring?
a) Glycosides
b) Phenolics
c) Alkaloids
d) Terpenes
View Answer
Answer: b
Explanation: Phenolics are the class of secondary metabolites which is known for the presence of aromatic ring structure along with the hydroxyl group.
8 - Question
Which of the following class does NOT belong to phenolic compounds?
a) Xanthone
b) Lignans
c) Gossypol
d) Flavonoids
View Answer
Answer: c
Explanation: Phenolic compounds have been characterized by the number of carbon atom it contains. Except for gossypol all other are phenolic compounds. Gossypol is the example of terpenes.
9 - Question
Name the phenolic compound present in tea?
a) Flavonoids
b) Lignans
c) Stilbene
d) Neolignans
View Answer
Answer: a
Explanation: Phenolic compound found in tea is catechin which belongs to the class of flavon 3-ol. Flavon 3-ol is the part of the flavonoid family.
10 - Question
Epicatechin gallate (ECG) is a type of flavonoid, found in which of the following?
a) Orange
b) Green tea
c) Berries
d) Carrot
View Answer
Answer: b
Explanation: Green tea and tea are rich in ECG which is a flavonoid and used in many dietary supplements.