When the centromere in a chromosome is located close to its end, the chromosome is called as:
1. | Metacentric | 2. | Sub-metacentric |
3. | Acrocentric | 4. | Telocentric |
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 |
A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is
1. | Absence of mitochondria | 2. | Presence of cell wall |
3. | Presence of haemoglobin | 4. | Absence of nucleus |
Which of the following statements is true for a secretory cell?
1. | Golgi apparatus is absent |
2. | Rough Endoplasmic Reticulum (RER) is easily observed in the cell |
3. | Only Smooth Endoplasmic Reticulum (SER) is seen in the cell |
4. | Secretary granules are formed in nucleus |
Which of the following statements can explain the fact that many scientists do not consider viruses as living organisms?
1. | Metabolism and growth are defining properties of living organisms. |
2. | Anything less than a complete structure of a cell does not ensure independent living. |
3. | All cells arise from pre-existing cells. |
4. | All biochemical reactions are catalyzed by enzymes. |
Spindle fibers are attached to the chromosome in the region of:
1. | Centrosome | 2. | Chromomere |
3. | Chromonema | 4. | Kinetochore |
Identify the appendage present on the surface of some bacterial cells that help attach them to rocks in streams and also to the host tissues:
1. | Flagella | 2. | Pili |
3. | Fimbriae | 4. | Cilia |
Which of the following is not considered as a part of the endo-membranous system of a eukaryotic cell?
1. | Lysosomes | 2. | Vacuoles |
3. | Endoplasmic reticulum | 4. | Peroxisomes |
In animal cells, steroidal hormones are synthesized in the:
1. | Rough endoplasmic reticulum |
2. | Smooth endoplasmic reticulum |
3. | Golgi apparatus |
4. | Lysosomes |
An important site of the formation of glycoproteins and glycolipids in a eukaryotic cell is the:
1. Rough endoplasmic reticulum
2. Smooth endoplasmic reticulum
3. Golgi apparatus
4. Lysosomes