Plant Pathology - Study Mode

[#606] When cell converts light energy into chemical energy, which of the following reaction would take place
Correct Answer

(A) ADP + iP = ATP

Explanation

Solution: When a cell converts light energy into chemical energy, ADP + iP = ATP reaction would take place. Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy. In plants, light-dependent reactions occur in the thylakoid membranes of the chloroplasts where they drive the synthesis of ATP and NADPH. The hydrogen ions are released in the thylakoid lumen and therefore contribute to the transmembrane chemiosmotic potential that leads to ATP synthesis.

[#607] Nitrogen is a major nutrient because
Correct Answer

(C) It is required by plants more

Explanation

Solution: Nitrogen is a major nutrient because it is required by plants more. Nitrogen is so vital because it is a major component of chlorophyll, the compound by which plants use sunlight energy to produce sugars from water and carbon dioxide. It is also a major component of amino acids, the building blocks of proteins. Without proteins, plants wither and die.

[#608] If roots of plant are removed and plant is placed in water, then what will be happen?
Correct Answer

(A) Passive absorption will continue

Explanation

Solution: If the roots of the plant are removed and the plant is placed in water, then Passive absorption will continue to happen. Passive transport is a type of membrane transport that does not require energy to move substances across cell membranes. The rate of passive transport depends on the permeability of the cell membrane, which, in turn, depends on the organization and characteristics of the membrane lipids and proteins.

[#609] Select the pair which is not correctly matched
Correct Answer

(D) Tylenchulus - Cyst nematode

Explanation

Solution: A. Longidorus - Needle nematode Longidorus is a genus of needle nematodes. Some of its species are plant pests. They may also transmit important plant viruses such as the potato virus U or the cacao necrosis virus. B. Pratylenchus - Lesion nematode Pratylenchus is a genus of nematodes known commonly as lesion nematodes. They are parasitic on plants and are responsible for root lesion disease. Lesion nematodes are migratory endoparasites that feed and reproduce in the root. C. Ditylenchus - Bulb nematode Ditylenchus dipsaci is a plant pathogenic nematode that primarily infects onion and garlic. It is commonly known as the stem nematode or bulb nematode. Symptoms of infection include stunted growth, discoloration of bulbs and swollen stems. D. Tylenchulus - Cyst nematode is not correctly matched. Tylenchulus semipenetrans is a Citrus nematode or Citrus root nematode. It is a species of plant pathogenic nematodes and the causal agent of the slow decline of citrus.

[#610] The scientific name of burrowing nematode is
Correct Answer

(D) Radopholus sp.

Explanation

Solution: The scientific name of the burrowing nematode is Radopholus sp. Radopholus similis is a species of nematode known commonly as the burrowing nematode. It is a parasite of plants, and it is a pest of many crops. It is an especially important pest of bananas and citrus, and it can be found on coconut, avocado, coffee, sugarcane, other grasses, and ornamentals. It is a migratory endoparasite of roots, causing lesions that form cankers. Infected plants experience malnutrition.