Plant Pathology - Study Mode

[#316] PR-9 has the property of
Correct Answer

(B) Peroxidase

Explanation

Solution: PR-9 has the property of Peroxidase. Pathogenesis-related (PR) proteins are proteins produced in plants in the event of a pathogen attack. They are induced as part of systemic acquired resistance. Pathogenesis-related proteins, often called PR proteins, are structurally diverse groups of plant proteins that are toxic to invading fungal pathogens. PR-9 is Haem peroxidase has Tobacco lignin forming peroxidase.

[#317] Who described the first plant nematode disease, the seed gall caused by Anguini tritici in 1743 AD
Correct Answer

(C) Needham

Explanation

Solution: Needham described the first plant nematode disease, the seed gall caused by Anguina tritici in 1743 AD. Turbevil Needham (1743) accidentally recorded the first plant parasitic nematode when he crushed one of the shrunken and blackened wheat grains and observed "Aquatic worms, Eels, or Serpents, which they very much resemble. Anguina tritici is a plant pathogenic nematode. It was the first plant parasitic nematode to be described in the literature in 1743. It causes a disease in wheat and rye called "ear-cockle" or seed gall.

[#318] An antitranspirant is
Correct Answer

(B) Phenyl mercuric acetate

Explanation

Solution: An antitranspirant is Phenyl mercuric acetate. Phenylmercuric acetate is an organomercury compound used as a preservative, disinfectant, and antitranspirant. It is an organomercury compound used as a preservative, disinfectant, and antitranspirant. It kills crabgrass, the seedlings of which are especially vulnerable, but leaves most lawn grasses intact.

[#319] A mature male gametophyte is formed from pollen mother cell by
Correct Answer

(C) Both A and B

Explanation

Solution: A mature male gametophyte is formed from pollen mother cell by one meiotic division and two meiotic divisions. At maturity, the male gametophyte consists of three cells, the vegetative cell and the two sperm cells, which lie within the cytoplasm of the vegetative cell. The male gametophyte develops and reaches maturity in an immature anther. In a plant's male reproductive organs, the development of pollen takes place in a structure known as the microsporangium.

[#320] R.Q. for organic acid is
Correct Answer

(B) > 1

Explanation

Solution: R.Q. for organic acid is > 1. A respiratory quotient is a dimensionless number used in calculations of basal metabolic rate (BMR) when estimated from carbon dioxide production. It is calculated from the ratio of carbon dioxide produced by the body to oxygen consumed by the body. It is measured using a respirometer. R.Q. of organic acid is more than one it is 1.6 for tartaric acid, and 1.33 for malic acid.