Q. No.Which of the following is absent in almost all plant cells?
1.
Plastid
2.
Cell wall
3.
A large central vacuole
4.
Centriole
The lipid content of the cell membrane mainly consists of:
| 1. | Phosphoglycerides | 2. | Cholesterol |
| 3. | Unsaturated fatty acids | 4. | Lipopolysaccharides |
The approximate percent composition of proteins and lipids in the cell membrane of an erythrocyte is respectively:
| 1. | 52% and 40% | 2. | 40% and 52% |
| 3. | 60% and 40% | 4. | 40% and 60% |
The measure of fluidity of a cell membrane is:
| 1. | the ability of proteins to flip-flop between the two layers of phospholipids |
| 2. | the ability of proteins to move laterally within the membrane |
| 3. | the ability of lipids to flip-flop between the two layers of phospholipids |
| 4. | the ability of lipids to move laterally within the membrane |
Algal cell walls are composed of all the following except:
1. Cellulose
2. Galactans and mannans
3. Minerals like calcium carbonate
4. Chitin
The middle lamella of the cell wall is composed of:
| 1. | Calcium carbonate | 2. | Calcium phosphate |
| 3. | Calcium pectate | 4. | Calcium oxalate |
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 |
The endo-membrane system of a eukaryotic cell includes:
| 1. | Lysosomes | 2. | Peroxisomes |
| 3. | Mitochondria | 4. | Chloroplasts |
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 |
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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