Q. No.A common characteristic feature of plant sieve tube cells and most of mammalian erythrocytes is
1.
Absence of mitochondria
2.
Presence of cell wall
3.
Presence of haemoglobin
4.
Absence of nucleus
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Select one which is not true for ribosome
1. Made of two sub units
2. Form poly some
3. May attach to m RNA
4. Have no role in protein synthesis
Which of the following dyes is best suited for staining chromosomes?
1. Basic Fuchsine
2. Safranin
3. Methylene blue
4. Carmine
Different cells have different sizes. Arrange the following cells in an ascending order of their size. Choose the correct option among the followings
i. Mycoplasma
ii. Ostrich eggs
iii. Human RBC
iv. Bacteria
Options:
1. i, iv, iii & ii
2. i, ii, iii & iv
3. ii, i, iii & iv
4. iii, ii, i& iv
Who proposed the fluid mosaic model of plasma membrane?
1. Camillo Golgi
2. Schneiden and Schwann
3. Singer and Nicolson
4. Robert Brown
Which of the following statements is true for a secretory cell?
| 1. | Golgi apparatus is absent |
| 2. | Rough Endoplasmic Reticulum (RER) is easily observed in the cell |
| 3. | Only Smooth Endoplasmic Reticulum (SER) is seen in the cell |
| 4. | Secretary granules are formed in nucleus |
What is a tonoplast?
1. Outer membrane of mitochondria
2. Inner membrane of chloroplast
3. Membrane boundary of the vacuole of plant cells
4. Cell membrane of plant cell
Which of the following is not true of a eukaryotic cell?
1. It has 80S type of ribosome present in the mitochondria
2. It has 80S type of ribosome present in the cytoplasm
3. Mitochondria contain circular DNA
4. Membrane bound organelles are present
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Which of the following statements is not true for plasma membrane?
| 1. | It is present in both plant and animal cells |
| 2. | Lipid is present as a bilayer in it |
| 3. | Proteins are present, integrated as well as loosely associated, with the lipid bilayer |
| 4. | Carbohydrate is never found in it |
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Plastid differs from mitochondria on the basis of one of the following features. Mark the right answer.
1. Presence of two layers of membrane
2. Presence of ribosome
3. Presence of chlorophyll
4. Presence of DNA
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