Question:
Consider the following statements.
(a) Plant cells have centrioles which are absent in almost all animal cells
(b) Ribosomes are the site of protein synthesis
(c) The middle lamella is the layer mainly of calcium carbonate which holds the different neighbouring cells together
(d) In animal cells steroidal hormones are synthesised by smooth endoplasmic reticulum.
Of the above statements :
Consider the following statements.
(a) Plant cells have centrioles which are absent in almost all animal cells
(b) Ribosomes are the site of protein synthesis
(c) The middle lamella is the layer mainly of calcium carbonate which holds the different neighbouring cells together
(d) In animal cells steroidal hormones are synthesised by smooth endoplasmic reticulum.
Of the above statements :
Updated On: Jun 6, 2022
- (a) and (b) only are correct
- (c) and (d) only are correct
- (b) and (d) only are correct
- (a) and (d) only are correct
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The Correct Option is C
Solution and Explanation
The centrioles occur in nearly all animal cells and in motile plant cells, such as zoospores of algae, sperm cells of ferns, and motile algae. They are absent in amoeba, prokaryotic cells, higher gymnosperms and all angiosperms. Middle lamella is a thin, amorphous and cementing layer between two adjacent cells. It is made up of pectates of calcium and magnesium.
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Concepts Used:
Cell: The Unit of Life
- A cell is derived as the functional and structural unit of life. Every cell is surrounded by a cell membrane that dissects the external and internal environments of the cell. The interior environment of a cell is called the cytoplasm.
- It carries cellular machinery and structural elements. The nucleus is present in the center of the cell, which includes all the hereditary information of an organism. Some of the molecules present in the cell are protein, carbohydrates, starch, and sugar.
Read More: Fundamental Unit of Life: Cell
Parts of Cell:
The different parts of a cell and their functions are as follows:
- Cell Membrane
- Cell Wall
- Nucleus
- Cytoplasm
