Statement I: | Macrophages and leucocytes in blood exhibit amoeboid movement in human body. |
Statement II: | Cytoskeletal elements like microfilaments are also involved in amoeboid movement apart from pseudopodia. |
1. | Statement I is correct; Statement II is correct |
2. | Statement I is correct; Statement II is incorrect |
3. | Statement I is incorrect; Statement II is correct |
4. | Statement I is incorrect; Statement II is incorrect |
Statement I: | All living organisms are made up of cells, and it is the basic structural and functional unit of life. |
Statement II: | Cells can only arise from pre-existing cells through the process of binary fission. |
1. | Both Statement I and Statement II are true. |
2. | Statement I is true, but Statement II is false. |
3. | Statement I is false, but Statement II is true. |
4. | Both Statement I and Statement II are false |
Statement I: | Anton Von Leeuwenhoek first saw and described a live cell. |
Statement II: | Robert Brown discovered cell but it was actually not a living cell. |
1. | Statement I is true; Statement II is true |
2. | Statement I is true; Statement II is not true |
3. | Statement I is not true; Statement II is true |
4. | Statement I is not true; Statement II is not true |
What is a polysome?
1. | Several messenger RNA molecules attached to the larger subunit of prokaryotic ribosome. |
2. | Several ribosomes attached to a single messenger RNA molecule. |
3. | Three major types of cellular RNAs, namely mRNA, rRNA, and tRNA, all attached to a single messenger RNA molecule. |
4. | Many ribosomes attached to the surface of endoplasmic reticulum. |
1. | Ribosomes are made of two subunits, 50S and 30S, which, when present together, form 70S ribosomes. |
2. | Ribosomes are made of two subunits, 50S and 30S, which, when present together, form 80S ribosomes. |
3. | Ribosomes are made of two subunits, 60S and 40S, which, when present together, form 70S ribosomes. |
4. | Ribosomes are made of two subunits, 50S and 30S, which, when present together, form 80S ribosomes. |
Statement I: | Procaryotic cells are usually smaller than eucaryotic cells. |
Statement II: | Procaryotic cells usually divide faster than eucaryotic cells. |
Statement I: | Prokaryotic cells lack a defined nucleus and instead have a nucleoid region where the DNA is concentrated. |
Statement II: | Eukaryotic cells possess a true nucleus enclosed by a nuclear membrane, which houses the cell’s genetic material. |
1. | Both Statement I and Statement II are true. |
2. | Statement I is true but Statement II is false. |
3. | Statement I is false but Statement II is true. |
4. | Both Statement I and Statement II are false. |
Match the following and select the correct answer :
(a) | Centriole | (i) | Infoldings in mitochondria |
(b) | Chlorophyll | (ii) | Thylakoids |
(c) | Cristae | (iii) | Nucleic acids |
(d) | Ribozymes | (iv) | Basal body cilia or flagella |
A | B | C | D | |
1. | (iv) | (ii) | (i) | (iii) |
2. | (i) | (ii) | (iv) | (iii) |
3. | (i) | (iii) | (ii) | (iv) |
4. | (iv) | (iii) | (i) | (ii) |