Q. No.Identify the correct statement regarding the part of a cell, the structure of which is shown in the given diagram:
1.
It is not found in the plant cells
2.
It serves to provide an attachment with a surface for a bacterial cell
3.
The structure is made of a protein called flagellin
4.
It can be used for movement by a eukaryotic cell
A feature unique to prokaryotes would be:
1. A cell wall not made up of cellulose
2. An extrachromosomal plasmid DNA
3. A cell membrane of peptidoglycan
4. Presence of inclusions
Select the incorrect statement(s) with respect to functions of various cellular components
| a. | Middle lamella works as glue to hold the adjacent cells together. |
| b. | Mitochondria, chloroplast and vacuoles are part of the endomembrane system as their functions are coordinated. |
| c. | Lipoidal steroid hormones are synthesized by ER component which is not associated to 80 S ribosomes. |
1. Only b
2. Only a
3. Both a and c
4. Both b and c
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
Which statements are correct regarding centriole?
| I: | Centrioles are typically made up of nine sets of short microtubule triplets, arranged in a cylinder. |
| II: | The main function of centrioles is to produce cilia during interphase and the aster and the spindle during cell division. |
| III: | Centrioles start duplicating when DNA replicates. |
| 1. | Only I and II | 2. | Only I and III |
| 3. | Only II and III | 4. | I, II and III |
Like mitochondria, the chloroplasts:
| I: | have their own DNA |
| II: | have an analogous inner membrane |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
| A. | The hydrolytic enzymes of lysosomes are active under alkaline pH |
| B. | Lysosomes are membrane-bound structures |
| C. | Lysosomes are formed by the process of packaging in the endoplasmic reticulum |
| D. | Lysosomes have numerous hydrolytic enzymes |
| 1. | A only | 2. | B, D Only |
| 3. | A, D Only | 4. | A, C Only |
| 1. | Substances with hydrophobic moiety |
| 2. | Substances with hydrophilic moiety |
| 3. | All substances, irrespective of hydrophobic and hydrophilic moiety |
| 4. | Substances which are soluble in lipids |
| Assertion (A): | It is important that the organisms should have cells. |
| Reason (R): | A cell keeps its chemical composition steady within its boundary. |
| 1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
| 2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
| 3. | (A) is true but (R) is false. |
| 4. | Both (A) and (R) are false. |
| I: | are formed by the extensions of plasma membrane into the cell. |
| II: | help in cell wall formation, DNA replication and distribution to daughter cells. |
| III: | contain pigments in cyanobacteria. |
2. Only I and III are correct
3. Only II and III are correct
4. I, II and III are correct
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