I: | All cells arise from pre-existing cells. |
II: | Prokaryotic cells do not have any organelles. |
III: | Eukaryotic cells have only membrane bound organelle. |
IV: | Centrosome helps in cell division in plants and animals. |
I: | bound by a single membrane only |
II: | found in all cells – both eukaryotic as well as prokaryotic |
III: | found in cytoplasm as well as chloroplasts, mitochondria and on RER |
1. | Only I and II | 2. | Only I and III |
3. | Only II and III | 4. | I, II and III |
Identify the incorrect statement regarding bacterial ribosomes:
1. They are associated with plasma membrane
2. They are 70 S with two subunits being 30 S and 40 S
3. Several ribosomes may attach to a single mRNA
4. They translate the mRNA into proteins
1. | several mRNA molecules attached to a ribosome |
2. | several ribosomes attached to a single mRNA |
3. | the three major types of cellular RNAs attached to an mRNA molecule |
4. | many ribosomes attached to the surface of endoplasmic reticulum |
1. | inclusion bodies | 2. | carboxysomes |
3. | magnetosomes | 4. | chromatophores |
1. | Lysosome | 2. | Peroxisome |
3. | Ribosome | 4. | Mesosome |
The number of correct statements amongst the given statements would be:
I: | The outer nuclear membrane is usually continuous with ER and also bears ribosomes |
II: | Nuclear pores allow movement of RNA and proteins in both directions between nucleus and cytoplasm |
III: | Satellite chromosomes have non-staining secondary constrictions at constant locations |
IV: | Microbodies are membrane bound vesicles containing various enzymes and are present in both plant and animal cells |
1. | 1 | 2. | 2 |
3. | 3 | 4. | 4 |