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.
The organelles that are included in the endomembrane system are:
| 1. | Golgi complex, Mitochondria, Ribosomes, and Lysosomes |
| 2. | Golgi complex, Endoplasmic reticulum, Mitochondria, and Lysosomes |
| 3. | The endoplasmic reticulum, Mitochondria, Ribosomes, and Lysosomes |
| 4. | The endoplasmic reticulum, Golgi complex, Lysosomes, and Vacuoles |
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) |
When the centromere is situated in the middle of two equal arms of chromosomes, the chromosome is referred as :
1. Sub-metacentric
2. Acrocentric
3. Metacentric
4. Telocentric
Match each item in Column I with one item in Column II and chose your answer from the codes given below:
Column I Column II
I. Cristae 1. Flat membramous sacs in stroma
II. Cisternae 2. Infoldings in mitochondria
III. Thylakoids 3. Disc-shaped sacs inGolgi apparatus
Codes:
|
I |
II |
III |
|
|
1. |
1 |
2 |
3 |
|
2. |
3 |
1 |
2 |
|
3. |
2 |
3 |
1 |
|
4. |
1 |
3 |
2 |
The figure below shows the structure of a mitochondrion with its four parts labelled (A), (B), (C) and (D). Select the part correctly matched with its function.
| 1. | Part (A) : Matrix – a major site for respiratory chain enzymes |
| 2. | Part (D) : Outer membrane – gives rise to the inner membrane by splitting |
| 3. | Part (B) : Inner membrane – forms infoldings called cristae |
| 4. | Part (C) : Cristae – possess single circular DNA molecule and ribosome |
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) |
What types of chromosomes are not seen in the human karyotype?
1. Acrocentric
2. Metacentric
3. Telocentric
4. Sub-metacentric
The biosynthesis of ribosomal RNA occurs in:
1. Ribosomes
2. Golgi apparatus
3. Microbodies
4. Nucleolus
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