객관식
In a typical leaf, which two mesophyll layers contain chloroplasts and perform most of the photosynthesis?
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18. Cell Junctions and Tissues
Plant Tissue
객관식
The primary cell what is composed of what?
A
Pectins
B
Ligin
C
Integrins
D
GAGs
검증된 단계별 안내1
Understand the context of the question: The question is asking about the composition of the primary cell wall in plants, which is a key structure in plant cells.
Identify the main components of the primary cell wall: The primary cell wall is mainly composed of cellulose, hemicellulose, and pectins. These components provide structural support and flexibility.
Evaluate the given options: Pectins are indeed a component of the primary cell wall, providing flexibility and porosity. Lignin is typically associated with the secondary cell wall, not the primary. Integrins are proteins found in animal cells, not plant cell walls. GAGs (glycosaminoglycans) are components of animal extracellular matrices, not plant cell walls.
Focus on the correct component: From the options provided, pectins are the correct component of the primary cell wall.
Conclude with the correct understanding: The primary cell wall is primarily composed of cellulose, hemicellulose, and pectins, with pectins being the correct answer from the given options.
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