Double unit membrane is absent in:
1. Ribosomes
2. Nucleus
3. Plastids
4. E.R
In the fluid mosaic model of a plasma membrane:
1. | Upper layer is non-polar and hydrophilic |
2. | The polar layer is hydrophobic |
3. | Phospholipids form a bimolecular layer in the middle part |
4. | Proteins form a middle layer |
Ribosomes are produced in:
1. Nucleolus
2. Cytoplasm
3. Mitochondria
4. Golgibody
The mitotic spindle is mainly composed of which protein:
1. Actin
2. Tubulin
3. Actomyosin
4. Myoglobin
Which of the following ribosomes are engaged in protein synthesis in the animal cell:
1. | Ribosomes that occur on the nuclear membrane and E.R. |
2. | Ribosomes of only cytosol |
3. | Ribosomes of only nucleolus and cytosol |
4. | Ribosomes of only mitochondria and cytosol |
Extranuclear DNA is found in:
1. Lysosome and chloroplast
2. Chloroplast and mitochondria
3. Mitochondria and lysosome
4. Golgi and E.R.
Lysosome contains:
1. Oxidative enzymes | 2. Hydrolytic enzymes |
3. Reductive enzymes | 4. Anabolic enzymes |
Chromosomes in a bacterial cell can be 1–3 in number and:
1. | Are always circular |
2. | Are always linear |
3. | Can be either circular or linear, but never both within the same cell |
4. | Can be circular as well as linear within the same cell |
The difference in gram ⊕ and gram bacteria is due to:
1. Cell wall
2. Cell membrane
3. Ribosome
4. Cytoplasm
Extranuclear chromosomes occur in:
1. | Peroxisome and ribosome | 2. | Chloroplast and mitochondria |
3. | Mitochondria and ribosome | 4. | Chloroplast and lysosome |