The plant cell wall is primarily composed of which of the following?
A. Chitin and Peptidoglycan
B. Cellulose, Hemicellulose, and Pectin
C. Proteins and Lipids
D. Silica and Calcium
Answer: Option B
Solution (By JKSSB Mock Tests)
The plant cell wall is primarily made up of cellulose, hemicellulose, pectins, and proteins. Cellulose provides the main structural framework, while hemicellulose and pectins help in cross-linking and providing flexibility. Chitin is found in fungal cell walls, and peptidoglycan is found in bacterial cell walls.
Explanation:
Tidal volume (TV) is the amount of air breathed in or out in one normal respiratory cycle, about 500 mL in a healthy adult. Vital capacity is the maximum air exhaled after a maximum inspiration. Total lung capacity is the total volume of air lungs can hold. Residual volume is the air remaining in lungs after maximum expiration to prevent alveolar collapse.
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