Q. No.Disc-shaped proteinaceous structure associated with centromere is called
1.
Kinetochore
2.
Secondary constriction
3.
Both Primary and Secondary constriction
4.
Nucleolar organizer
Choose the correct option with respect to function of the cell organelles
| A | B |
C |
D | |
| 1. | Protein synthesizes |
Citric acid cycle enzymes |
Protein processing |
Lipid modification |
| 2. | mRNA synthesis |
ETS | Glyco- sidation |
Protein processing |
| 3. | Trans- cription |
Anaerobic respiration |
Secretion | Sex hormone production |
| 4. | rRNA synthesis |
Pyruvate dehydro- genase complex |
Protein modification |
Protein synthesis |
Select the wrong statement about eukaryotic cells.
| 1. | They have well defined nucleus |
| 2. | Possess 70S ribosomes in mitochondria , chloroplast |
| 3. | May have a cell wall |
| 4. | No organelles are single membrane bound |
Mark the correct statement about centriole.
| 1. | Forms basal body |
| 2. | Found in higher plant cells |
| 3. | Has ‘9 + 2’ organisation of microtubules |
| 4. | Is surrounded by plasma membrane |
Who first explained that new cells are formed from pre-existing cells
1. Theodor Schwann
2. Rudolf Virchow
3. Matthias Schleiden
4. Robert Hooke
Select the incorrect match
1. Palade particle – Ribosome
2. Flagella – Cell movement
3. Centriole – Found in higher plants
4. Lysosome – Acid hydrolase
The given diagram represents the four different structures which one of these is correct containing material and function:-
|
|
|
|
|
|
a. |
Nucleolus |
NOR |
Synthesis of rRNA for formation of 80 S Ribosome |
|
b. |
Nuclear Pore |
Chromatin |
Exchange material between cytoplasm and nucleoplasm |
|
c. |
Nucleoplasm Protein |
Nucleoplasmin |
Formation of nuclear matrix |
|
d. |
Nuclear membrane |
Ribosome |
Cellulose synthesis |
1. A
2. B
3. C
4. D
Eukaryotic cells considered as more efficient than prokaryotic cells, due to -
| 1. | compartmentalisation of cytoplasm |
| 2. | Infolding of membrane |
| 3. | Presence of cell wall |
| 4. | Aerobic respiration |
Which of the following cell organelle is absent in prokaryotic cell?
1. Ribosome
2. Lysosome
3. Mitochondria
4. 2 and 3 both
ER, Golgi complex, lysosomes and vacuoles are included in endomembrane system because :-
| 1. | Their function are similar |
| 2. | Their structure are same |
| 3. | Their function are co-ordinated |
| 4. | Golgi complex, lysosomes and vacuoles are originated from the ER |
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