I: | semi-autonomous organelles. |
II: | formed by the division of pre-existing organelles and they contain DNA but lack protein-synthesizing machinery. |
Which one of the following cellular parts is correctly described?
1. | Centrioles - sites for active RNA synthesis |
2. | Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s) |
3. | Lysosomes - optimally active at a pH of about 8.5 |
4. | Thylakoids - flattened membranous sacs forming the grana of chloroplasts |
List-I | List-II | ||
A. | Fleming | I. | Disc shaped sacs or cisternae near cell nucleus |
B. | Robert Brown | II. | Chromatin |
C. | George Palade | III. | Ribosomes |
D. | Camillo Golgi | IV. | Nucleus |
1. | A-II,B-IV,C-III,D-I |
2. | A-II, B-III,C-I,D-IV |
3. | A-I,B-II, C-III, D-IV |
4. | A-IV,B-II, C-III, D-I |
Match the following and select the correct answer:
Column I | Column II | ||
(a) | Centriole | (i) | Infoldings in mitochondria |
(b) | Chlorophyll | (ii) | Thylakoids |
(c) | Cristae | (iii) | Nucleic acids |
(d) | Ribozymes | (iv) | Basal body of cilia or flagella |
1. A-iv, B-ii, C-i, D-iii
2. A-i, B-ii, C-iv, D-iii
3. A-i, B-iii, C-ii, D-iv
4. A-iv, B-iii, C-i, D-ii
Statement I: | Mitochondria and chloroplasts are both double membrane bound organelles. |
Statement II: | Inner membrane of mitochondria is relatively less permeable, as compared to chloroplast. |
1. | Both Statement I and Statement II are incorrect. |
2. | Statement I is correct but Statement II is incorrect. |
3. | Statement I is incorrect but Statement II is correct. |
4. | Both Statement I and Statement II are correct. |
The organelles in a eukaryotic cell that have their own genome are:
1. RER and SER
2. Mitochondria and chloroplasts
3. Plasmids and plastids
4. Nucleus and ribosomes
I | Chloroplasts | contain chlorophyll and carotenoid pigments |
II | Amyloplasts | store carbohydrates |
III | Elaioplasts | store oils and fats |
IV | Aleuroplasts | store proteins |
Structure | Size range | |
1. | Perinuclear space | 10 – 50 nm |
2. | Length of chloroplasts | 2 – 5 µm |
3. | Typical eukaryotic cell | 10 – 20 µm |
4. | Typical bacterium | 1 – 2 µm |