The osmotic expansion of a cell kept in water is chiefly regulated by [2014]
mitochondria
vacuoles
plastids
ribosomes
(2)
Vacuoles are non-cytoplasmic areas present inside cytoplasm and separated from latter by tonoplast. They are believed to be formed by expansion and pinching off from ER. There occurs a large central vacuole and many small vacuoles in plant cells. They play a major role in osmotic expansion of a cell.
Match the following and select the correct answer. [2014]
| (A) | Centriole | (i) | Infoldings in mitochondria |
| (B) | Chlorophyll | (ii) | Thylakoids |
| (C) | Cristae | (iii) | Nucleic acids |
| (D) | Ribozymes | (iv) | Basal body of cilia or flagella |
A–(iv), B–(ii), C–(i), D–(iii)
A–(i), B–(ii), C–(iv), D–(iii)
A–(i), B–(iii), C–(ii), D–(iv)
A–(iv), B–(iii), C–(i), D–(ii)
Match List-I with List- II. [2025]
| List-I | List-II | ||
| A. | Centromere | I. | Mitochondrion |
| B. | Cilium | II. | Cell division |
| C. | Cristae | III. | Cell movement |
| D. | Cell membrane | IV. | Phospholipid Bilayer |
Choose the correct answer from the options given below :
A-I, B-II, C-III, D-IV
A-II, B-I, C-IV, D-III
A-IV, B-II, C-III, D-I
A-II, B-III, C-I, D-IV
(4)
Centromere - Helps in cell division
Cilium - Helps in cell movement
Cristae - Finger like structures of mitochondria
Cell membrane - Is a phospholipid bilayer
Given below are two statements : one is labelled as Assertion (A), and the other is labelled as Reason (R). [2025]
Assertion (A) : The primary function of the Golgi apparatus is to package the materials made by the endoplasmic reticulum and deliver it to intracellular targets and outside the cell.
Reason (R) : Vesicles containing materials made by the endoplasmic reticulum fuse with the cis face of the Golgi apparatus, and they are modified and released from the trans face of the Golgi apparatus.
In the light of the above statements, choose the correct answer from the options given below :
Both A and R are true and R is the correct explanation of A
Both A and R are true but R is not the correct explanation of A
A is true but R is false
A is false but R is true
(2)
The primary function of Golgi apparatus is to package the materials made by endoplasmic reticulum and deliver it to intracellular targets and outside the cell, this statement is correct and the reason statement is also correct. Golgi apparatus remains in close association with endoplasmic reticulum. Here, assertion and reason statements both are correct but reason is not correctly explaining assertion.
