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#plant secondary metabolites

13 public questions tagged with this topic.

Methionine serves as precursor for biosynthesis of:

Pick B: Glucosinolates. Thinking through PSS- Sec G- Sec metabolites step by step rules out the lookalikes and leaves Glucosinolates. Skip these: A) Alkaloids; C) Phenolics; D) Terpenoids. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Brassicaceae plants characteristically accumulate:

Glucosinolates (D) is correct here. This is core PSS- Sec G- Sec metabolites: once you know the definition or pathway step, Glucosinolates is the clear fit. The wrong ones are A) Alkaloids; B) Terpenoids; C) Phenolics. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Most powerful natural insect feeding deterrent is:

Answer: C) Azadirachtin. For PSS- Sec G- Sec metabolites, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Nicotine; B) Pyrethrin; D) Caffeine. Name the process first, then pick the option that describes it — don’t reverse cause and effect.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Limonoids belong to which terpene class?

Pick D: Triterpenes. Thinking through PSS- Sec G- Sec metabolites step by step rules out the lookalikes and leaves Triterpenes. Skip these: A) Monoterpenes; B) Sesquiterpenes; C) Diterpenes. For hormones and genes, match the molecule or gene to its real role, not a neighboring pathway.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Azadirachtin is classified as a:

Answer: C) Limonoid. For PSS- Sec G- Sec metabolites, remember the key idea and you’ll land on this option; the distractors usually swap cause and effect or confuse similar terms. Avoid: A) Alkaloid; B) Phenolic; D) Flavonoid. Name the process first, then pick the option that describes it — don’t reverse cause and effect.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Dhurrin occurs in:

The right choice is B: Sorghum. In PLANT SEC METABOLITES, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Cassava; C) Potato; D) Rice. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Cyanogenic glycosides release:

HCN (C) is correct here. This is core PLANT SEC METABOLITES: once you know the definition or pathway step, HCN is the clear fit. The wrong ones are A) NH3; B) CO2; D) SO2. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Glycosides consist of:

The right choice is C: Glycone and aglycone. In PLANT SEC METABOLITES, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Two sugars; B) Protein-lipid; D) Only sugar. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Alkaloids are:

The right choice is C: Nitrogen-containing compounds. In PLANT SEC METABOLITES, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Nitrogen-free; B) Carbohydrates; D) Lipids. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Which pathway supplies C5 units for monoterpenes?

The right choice is C: MEP. In PLANT SEC METABOLITES, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Mevalonate; B) Shikimate; D) Malonate. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

Azadirachtin is obtained from:

The right choice is B: Neem. In PLANT SEC METABOLITES, that matches how the process or concept actually works — the other choices mix up related ideas or use the wrong mechanism. Skip these: A) Cannabis; C) Pine; D) Ginkgo. A quick check: if an option needs energy, pumps, or the opposite direction of movement, ask whether that really applies.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.

The largest class of plant secondary metabolites is:

Terpenoids (C) is correct here. This is core PLANT SEC METABOLITES: once you know the definition or pathway step, Terpenoids is the clear fit. The wrong ones are A) Phenolics; B) Alkaloids; D) Glycosides. If the topic is about gradients or potentials, water/solutes move from higher to lower of the relevant quantity.

Ref: Best CSIR NET Plant Physiology books: Master Unit 6 with Taiz & Zeiger and Salisbury & Ross. Crack Part C experimental questions with top textbooks.