Q. No.Which of the following is an incorrect statement?
1. The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm.
2. Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm.
3. Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles.
4. Microbodies are present both in plant and animal cells.
1. The perinuclear space forms a barrier between the materials present inside the nucleus and that of the cytoplasm.
2. Nuclear pores act as passages for proteins and RNA molecules in both directions between nucleus and cytoplasm.
3. Mature sieve tube elements possess a conspicuous nucleus and usual cytoplasmic organelles.
4. Microbodies are present both in plant and animal cells.
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The organelles that are included in the endomembrane system are:
1. Golgi complex, Mitochondria, Ribosomes and Lysosomes
2. Golgi complex, Endoplasmic reticulus, Mitochondria and Lysosomes
3. Endoplasmic reticulum, Mitochondria, Ribosomes and Lysosomes
4. Endoplasmic reticulum, Golgi complex, Lysosomes and Vacuoles
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Match List - I with List - II
| List -I | List -II | ||
| (a) | Cristae | (i) | Primary constriction in chromosome |
| (b) | Thylakoids | (ii) | Disc-shaped sacs in Golgi apparatus |
| (c) | Centromere | (iii) | Infoldings in mitochondria |
| (d) | Cisternae | (iv) | Flattened membranous sacs in stroma of plastids |
Choose the correct answer from the options given below.
| (a) | (b) | (c) | (d) | |
| 1. | (iii) | (iv) | (i) | (ii) |
| 2. | (ii) | (iii) | (iv) | (i) |
| 3. | (iv) | (iii) | (ii) | (i) |
| 4. | (i) | (iv) | (iii) | (ii) |
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Extranuclear chromosomes occur in:
| 1. | Peroxisome and ribosome | 2. | Chloroplast and mitochondria |
| 3. | Mitochondria and ribosome | 4. | Chloroplast and lysosome |
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Identify the incorrect statement regarding the fluid mosaic model of the cell membrane:
| 1. | Proteins are classified as peripheral or integral depending on the ease of extraction |
| 2. | The lipid component of the membrane mainly consists of phosphoglycerides |
| 3. | Polar heads of the lipid molecules are towards the inner side and the non-polar tails towards the outer side |
| 4. | Quasi-fluid nature of lipids enable lateral movement of proteins within the overall bilayer |
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In a eukaryotic cell, the two organelles that can transform energy are:
1. bound by a single membrane
2. parts of the endomembrane system
3. present only in the plant cells
4. semi-autonomous
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In the ultrastructure of cilia/ flagella, the radial spokes connect one of the tubules of each peripheral doublet to:
1. the bridge of the central microtubules
2. another tubule to the doublet
3. the central sheath
4. dynein arms
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Identify the components labelled A, B, C and D in the diagram below from the list (i) to (viii) given along with components:
(i) Cristae of mitochondria
(ii) Inner membrane of mitochondria
(iii) Cytoplasm
(iv) Smooth endoplasmic reticulum
(v) Rough endoplasmic reticulum
(vi) Mitochondrial matrix
(vii) Cell vacuole
(viii) Nucleus
The correct components are:
| A | B | C | D | |
| 1. | (i) | (iv) | (viii) | (vi) |
| 2. | (vi) | (v) | (iv) | (vii) |
| 3. | (v) | (i) | (iii) | (ii) |
| 4. | (v) | (iv) | (viii) | (iii) |
An elaborate network of filamentous proteinaceous structures present in the cytoplasm which helps in the maintenance of cell shape is called -
| 1. | Endosplasmic Reticulum | 2. | Plasmalemma |
| 3. | Cytoskeleton | 4. | Thylakoid |
The chromosomes in which centromere is situated close to one end are
| 1. | metacentric | 2. | acrocentric |
| 3. | telocentric | 4. | sub-metacentric |
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