Q. No.Algal cell walls are composed of all the following except:
1. Cellulose
2. Galactans and mannans
3. Minerals like calcium carbonate
4. Chitin
1. Cellulose
2. Galactans and mannans
3. Minerals like calcium carbonate
4. Chitin
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The middle lamella of the cell wall is composed of:
| 1. | Calcium carbonate | 2. | Calcium phosphate |
| 3. | Calcium pectate | 4. | Calcium oxalate |
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A narrow thread of cytoplasm that passes through the cell walls of adjacent plant cells and allows communication between them is called as:
| 1. | Desmosome | 2. | Plasmodesma |
| 3. | Adhering junction | 4. | Tight junction |
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The endo-membrane system of a eukaryotic cell includes:
| 1. | Lysosomes | 2. | Peroxisomes |
| 3. | Mitochondria | 4. | Chloroplasts |
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Which of the following statements would not be applicable to the rough endoplasmic reticulum in a eukaryotic cell?
| 1. | Frequently observed in cells actively involved in protein synthesis and secretion |
| 2. | Bear ribosomes on their surface |
| 3. | Continuous with the outer membrane of the nucleus |
| 4. | Sites of synthesis of steroidal hormones |
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The number of correct statements regarding Golgi apparatus amongst the given statements will be:
| I: | The concave trans surface is the maturing face. |
| II: | The cis and trans faces are entirely different but interconnected. |
| III: | It remains in close association with the endoplasmic reticulum. |
| IV: | Site of formation of glycoproteins and glycolipids. |
| 1. | 1 | 2. | 2 |
| 3. | 3 | 4. | 4 |
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Acid hydrolases are found in a single membrane bound organelle called:
| 1. Glyoxysome | 2. Lysosome |
| 3. Peroxisome | 4. Ribosome |
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A single membrane, tonoplast, binds the:
| 1. Inclusion bodies | 2. Polysomes |
| 3. Vacuoles | 4. Lysosomes |
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Which of the following organelles in a eukaryotic cell can only be seen after staining with vital dye?
| 1. Mitochondria | 2. Chloroplasts |
| 3. Nucleus | 4. Endoplasmic reticulum |
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All the following are located in the mitochondrial matrix except:
1. Single circular DNA molecule
2. Proteins of electron transport chain
3. 70 S ribosomes
4. Enzymes of Kreb’s cycle
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