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MCQOPTIONS
This section includes 14620 Mcqs, each offering curated multiple-choice questions to sharpen your NEET knowledge and support exam preparation. Choose a topic below to get started.
| 1651. |
The function of centrosome is: |
| A. | Inhibition of cell division |
| B. | Initiates cell division |
| C. | To increase protein synthesis |
| D. | Initiate cytokinesis |
| Answer» E. | |
| 1652. |
Which of the following contributes to differences in the two sides of the cell membrane? |
| A. | Differences in peripheral proteins. |
| B. | Different domains expressed on the ends of integral proteins. |
| C. | Differences in phospholipid types. |
| D. | All of the above |
| Answer» E. | |
| 1653. |
Which of the following is not the function of cell wall? (i) Provides shape to the cell. (ii) Protects the cell from mechanical damage and infection. (iii) Helps in cell to cell interaction, (iv)Provides barrier to undesirable macromolecules. |
| A. | Only (i) |
| B. | Only (iv) |
| C. | Only (ii), (iii) and (iv) |
| D. | None of the above |
| Answer» E. | |
| 1654. |
Match column-I with column-II and select the correct option. Column-I Column-II RER (i) Intracellular and extracellular digestion Cell wall (ii) Provide structural support to the cell Flagella (iii) Protein synthesis and secretion Lysosomes (iv) Responsible for cell movement |
| A. | A-III; B-II; C-IV; D-I |
| B. | A-II; B-III; C-IV; D-I |
| C. | A- I; B - III; C - II; D ? IV |
| D. | A - IV; B - II; C - III; D ? I |
| Answer» B. A-II; B-III; C-IV; D-I | |
| 1655. |
Similarity between plant and animal flagella microtubules is: |
| A. | 9+3 |
| B. | 9+2 |
| C. | 9+6 |
| D. | 9+1 |
| Answer» C. 9+6 | |
| 1656. |
Prokaryotic cell does not have: |
| A. | Nucleolus |
| B. | Membrane bound organelles |
| C. | Centrioles |
| D. | All of the above |
| Answer» E. | |
| 1657. |
Which organelle is surrounded by a double phospholipid bilayer with many large pores? |
| A. | Nuclear envelope |
| B. | Plasma membrane |
| C. | Golgi apparatus |
| D. | Mitochondrion |
| Answer» B. Plasma membrane | |
| 1658. |
Gas vacuoles are not reported in: |
| A. | Cyanobacteria |
| B. | Purple/green photosynthetic bacteria |
| C. | Amoeba |
| D. | Prokaryotes |
| Answer» D. Prokaryotes | |
| 1659. |
When mitochondria are actively engaged in phosphorylation and electron transport, it is: |
| A. | in active state |
| B. | in condensed state |
| C. | having enlarged intermembrane space |
| D. | All of these |
| Answer» E. | |
| 1660. |
Protein synthesis in an animal cell occurs: |
| A. | on ribosomes present in cytoplasm as well as in mitochondria. |
| B. | on ribosomes present in the nucleolus as well as in cytoplasm. |
| C. | only on ribosomes attached to the nuclear envelope and endoplasmic reticulum. |
| D. | only on the ribosomes present in cytosol. |
| Answer» B. on ribosomes present in the nucleolus as well as in cytoplasm. | |
| 1661. |
Which of the following types of junctions are responsible for communication between cells? |
| A. | Tight junctions |
| B. | Desmosomes |
| C. | Gap junctions |
| D. | None of the above |
| Answer» D. None of the above | |
| 1662. |
Which of the following lacks cell wall? |
| A. | Gametes |
| B. | Amoeba |
| C. | Mycoplasma |
| D. | All of these |
| Answer» E. | |
| 1663. |
Choose the incorrect match. |
| A. | Nucleus ? RNA |
| B. | Lysosome ? Protein synthesis |
| C. | Mitochondria ? Respiration |
| D. | Cytoskeleton ? Microtubules |
| Answer» C. Mitochondria ? Respiration | |
| 1664. |
Which one of the following cellular parts is correctly matched with their characters? |
| A. | Centrioles - Sites for active RNA synthesis. |
| B. | Lysosomes - Optimally active at a pH of about 8.5 |
| C. | Thylakoids - Flattened membranous sacs forming the grana of chloroplasts. |
| D. | Ribosomes - Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S). |
| Answer» D. Ribosomes - Those on chloroplasts are larger (80S) while those in the cytoplasm are smaller (70S). | |
| 1665. |
Which one is the correct option for the labelled diagrams l, 2, 3 and 4? |
| A. | I - Telocentric chromosome, 2 -Acrocentric chromosome, 3 - Submetacentric chromosome, 4 - Metacentric chromosome |
| B. | 1 -Acrocentric chromosome, 2 - Telocentric chromosome, 3 - Metacentric chromosome, 4 - Submetacentric chromosome |
| C. | 1 - Submetacentric chromosome, 2 - Metacentric chromosome, 3 - Telocentric chromosome, 4 - Acrocentric chromosome |
| D. | 1 - Metacentric chromosome, 2 - Submetacentric chromosome, 3- Acrocentric chromosome, 4 - Telocentric chromosome. |
| Answer» B. 1 -Acrocentric chromosome, 2 - Telocentric chromosome, 3 - Metacentric chromosome, 4 - Submetacentric chromosome | |
| 1666. |
Which of the substance is a complicated mixture of glycerol + phellonic acids deposited on cork cells to make it impermeable to water? |
| A. | Silica |
| B. | Cutin |
| C. | Lignin |
| D. | Suberin |
| Answer» E. | |
| 1667. |
In nucleoplasm, a conspicuous body of spherical shape attached to a particular chromosome on a definite position is called. |
| A. | plasmid |
| B. | karyolymph |
| C. | nucleolus |
| D. | nuclear reticulum |
| Answer» D. nuclear reticulum | |
| 1668. |
Consider the following statements and choose the correct statement. (i) The endomembrane system includes mitochondria, chloroplast and peroxisomes. (ii) Smooth endoplasmic reticulum is the major site for synthesis of lipid. (iii) Rough endoplasmic reticulum is actively involved in protein synthesis. (iv) Mitochondrial matrix possesses single circular DNA, a few RNA and 80S ribosomes. |
| A. | (i) and (iii) |
| B. | (ii) and (iv) |
| C. | (iii) and (iv) |
| D. | (ii) and (iii) |
| Answer» E. | |
| 1669. |
Which of the following pair are correctly matched? (i) Amyloplasts - Store proteins (ii) Mitochondrion - Tower house' of the cell (iii) Stroma - Chlorophyll pigment (iv) Axoneme - 9+2 array |
| A. | (i) and (iii) only |
| B. | (ii), (iii) and (iv) only |
| C. | (iii) and (iv) only |
| D. | (ii) and (iv) only |
| Answer» E. | |
| 1670. |
Which structure is present in chromosomes? |
| A. | Nucleus |
| B. | Centromere |
| C. | Centrosome |
| D. | Golgi body |
| Answer» C. Centrosome | |
| 1671. |
Select the incorrect statement about prokaryotic ribosomes. |
| A. | 50S and 30S subunits unite to form 70S ribosomes. |
| B. | Polysome/polyribosome consists of many ribosomes only. |
| C. | Ribosome is the site of protein synthesis. |
| D. | Poly some indicate the synthesis of identical polypeptide in multiple copies. |
| Answer» C. Ribosome is the site of protein synthesis. | |
| 1672. |
Which of the following is present in both prokaryotes and eukaryotes? |
| A. | Lysosome |
| B. | Vesicles |
| C. | Chloroplast |
| D. | Plasma membrane |
| Answer» E. | |
| 1673. |
Which of the following layer is present nearest plasma membrane in plant cell? |
| A. | Secondary wall |
| B. | Middle lamella |
| C. | Primary wall |
| D. | Tonoplast |
| Answer» B. Middle lamella | |
| 1674. |
Which of the following enzymes are found in matrix of peroxisomes? |
| A. | NADH cytochrome reeducates |
| B. | Glyoxidases and malate dehydrogenase |
| C. | Acid phosphatases and isocitric lysase |
| D. | Catalases and oxidases |
| Answer» E. | |
| 1675. |
The following diagram shows some of the missing structures in a plant cell (1-5). Choose the correct option. |
| A. | 1 - Plasmodesmata, 2 - Rough endoplasmic reticulum, 3 - Golgi apparatus, 4 - Mitochondrion, 5 ? Ribosomes |
| B. | 1 - Desmosome, 2 - Rough endoplasmic reticulum, 3 - Golgi apparatus, 4 - Mitochondrion, 5 ? Ribosomes |
| C. | 1 - Plasmodesmata, 2 - Smooth endoplasmic reticulum, 3 - Golgi apparatus, 4 - Mitochondrion, 5 ? Ribosomes |
| D. | 1 - Tight junction, 2 - Rough endoplasmic reticulum, 3 - Golgi apparatus, - Mitochondrion, 5 - Ribosomes |
| Answer» B. 1 - Desmosome, 2 - Rough endoplasmic reticulum, 3 - Golgi apparatus, 4 - Mitochondrion, 5 ? Ribosomes | |
| 1676. |
Which of the following statements is/are correct? (i) The endomembrane system includes plasma membrane, ER, Golgi complex, lysosomes and vacuoles. (ii) ER helps in the transport of substances, synthesis of proteins, lipoproteins and glycogen. (iii) Ribosomes are involved in protein synthesis. (iv) Mitochondria help in oxidative phosphorylation and generation of ATR |
| A. | (ii), (iii) and (iv) |
| B. | (i) only |
| C. | (ii) only |
| D. | (iii) only |
| Answer» B. (i) only | |
| 1677. |
An animal cell is put into a bathing solution and it gains additional water. Choose the correct statements. |
| A. | The cell was isoosmotic to the bathing solution. |
| B. | The cell was hypoosmotic to the bathing solution. |
| C. | The cell was hyperosmotic to the bathing solution. |
| D. | The bathing solution was hyperosmotic to the cell. |
| Answer» D. The bathing solution was hyperosmotic to the cell. | |
| 1678. |
Which of the following is related to glycosylation of protein? |
| A. | Endoplasmic reticulum |
| B. | Peroxisome |
| C. | Lysosome |
| D. | Mitochondria |
| Answer» B. Peroxisome | |
| 1679. |
Match column-I (cell organelle) with column-II (membrane) and select the correct option from the codes given below. Column-I Column-II A. Mitochondria I. Without membrane B. Lysosomes II. Single membrane C. Ribosomes III. Double membrane |
| A. | A-I; B-II; C-III |
| B. | A-III; B-I; C-II |
| C. | A-III; B-II; C-I |
| D. | A-II; B-III; C-I |
| Answer» D. A-II; B-III; C-I | |
| 1680. |
Which one of the following combination is mismatched? |
| A. | Glycocalyx - May be capsule or slime layer |
| B. | Pili ? Reproduction |
| C. | Cell wall - Protective, determines shape, prevents from bursting |
| D. | Flagella, pili and fimbriae ? Surface structures of bacterial cell |
| Answer» C. Cell wall - Protective, determines shape, prevents from bursting | |
| 1681. |
Identify the correct statements and choose the option. (i) The smallest of all cells are nerve cells. (ii) Bacteria are 3-5\[\mu m\] in length. (iii) The Ostrich egg is the largest cell. (iv) Mycoplasma is the smallest cell (0.3 p-m in length). |
| A. | (i), (ii), (iii) and (iv) |
| B. | Only (ii) |
| C. | Only (i) |
| D. | (ii), (iii) and (iv) |
| Answer» E. | |
| 1682. |
Cell wall in higher plants is made up of: |
| A. | Cellulose + lignin |
| B. | Cellulose + pectin |
| C. | Cellulose + suberin |
| D. | Cellulose + lipid |
| Answer» C. Cellulose + suberin | |
| 1683. |
Mitochondria supply most of the necessary biological energy by: |
| A. | Breaking down of sugar |
| B. | Oxidising substrates of TCA cycle |
| C. | Reducing NADP |
| D. | Breaking down of protein |
| Answer» C. Reducing NADP | |
| 1684. |
The simplest way to distinguish a prokaryotic from a eukaryotic cell, is to check for: |
| A. | Plasma membrane |
| B. | Nucleus |
| C. | DNA |
| D. | Proteins |
| Answer» C. DNA | |
| 1685. |
Which of the following limits the movement of molecules when carrier-mediated facilitated diffusion is involved? |
| A. | Concentration gradient |
| B. | Availability of carrier molecules |
| C. | Temperature |
| D. | All of the above |
| Answer» E. | |
| 1686. |
The polynucleated condition appeared by free nuclear division without cytokinesis is: |
| A. | Syncytium |
| B. | Coenocytic |
| C. | Found in amphibian oocyte |
| D. | All of these |
| Answer» C. Found in amphibian oocyte | |
| 1687. |
Match column-I and column-II and select the correct option. Column-I Column-II A. Bacteria without walls (i) Lysosome B. Small circular DNA (ii) Mycoplasma cells C. Flattened sacs in a chloroplast (iii) Thylakoid D. A vesicle in which hydrolytic enzymes are stored (iv) Plasmid |
| A. | A-III; B-IV; C-II; D-I |
| B. | A-II; B-IV; C-III; D-I |
| C. | A-I; B-II; C-III; D-IV |
| D. | A-IV; B-III; C-I; D-II |
| Answer» C. A-I; B-II; C-III; D-IV | |
| 1688. |
Which of the following organelles is directly connected to the outer membrane of the nucleus in a eukaryotic cell? |
| A. | Mitochondrion |
| B. | Lysosome |
| C. | Golgi apparatus |
| D. | Endoplasmic reticulum |
| Answer» E. | |
| 1689. |
Ion carriers are located in: |
| A. | Nucleus |
| B. | Cell wall |
| C. | Cellular space |
| D. | Plasma membrane |
| Answer» E. | |
| 1690. |
VI. In which of the following' cell types would you see more cellular detail using an electron microscope as compared to a light microscope? |
| A. | Animal |
| B. | Plant |
| C. | Bacteria |
| D. | All of the above |
| Answer» E. | |
| 1691. |
The principal protein of cilia and flagella is: |
| A. | Tubulin |
| B. | Nexin |
| C. | Myosin |
| D. | Albumin |
| Answer» B. Nexin | |
| 1692. |
Schleiden and Schwann proposed: |
| A. | phenomenon of Brownian movement |
| B. | cell theory or cell doctrine |
| C. | protoplasm as a physical basis of life |
| D. | None of the above |
| Answer» C. protoplasm as a physical basis of life | |
| 1693. |
Which of the following option correctly match 1, 2, 3, and 4 indicated in the diagram? |
| A. | l-Thylakoid, 2-Stromallamella, 3-Stroma, 4 ? Granum |
| B. | 1 - Granum, 2 - Thylakoid, 3 ? Stromal lamella, 4 ? Stroma |
| C. | 1 - Thylakoid, 2 - Granum, 3 ? Stromal lamella, 4 ? Stroma |
| D. | 1 - Granum, 2 ? Thylakoid, 3 ? Stroma 4 - Stromal lamella |
| Answer» C. 1 - Thylakoid, 2 - Granum, 3 ? Stromal lamella, 4 ? Stroma | |
| 1694. |
Centrioles and centrosomes are present in cells of: |
| A. | Bacteria |
| B. | Cyanobacteria |
| C. | Green plants |
| D. | Animals |
| Answer» E. | |
| 1695. |
Which of the face of golgi complex is associated with ER? |
| A. | Forming face i.e., Trans-face |
| B. | Maturing face i.e., Trans-face |
| C. | Both forming and maturing face |
| D. | Forming face or Cis-face |
| Answer» E. | |
| 1696. |
Plasmodesmata connections help in: |
| A. | Cytoplasmic streaming. |
| B. | Synchronous mitotic divisions. |
| C. | Locomotion of unicellular organisms. |
| D. | Movement of substances between cells. |
| Answer» E. | |
| 1697. |
Both chloroplasts and mitochondria: |
| A. | have multiple membranes. |
| B. | have highly structured innermost membranes. |
| C. | are found only in eukaryotic cells. |
| D. | All of the above |
| Answer» E. | |
| 1698. |
Match the components 1, 2, 3, 4 and 5 in the diagram (cell membrane) below from the list (i) to (vii). (i) Sugar (ii) Protein (iii) Lipid bilayer (iv) Integral protein (v) Cytoplasm (vi) Cell wall (vii) External protein |
| A. | 1 - (i), 2 - (ii), 3 - (iii), 4 - (iv), 5 - (v) |
| B. | 1 - (ii), 2 - (i), 3 - (iii), 4 - (iv), 5 - (v) |
| C. | 1 - (i), 2 - (ii), 3 - (iii), 4 - (iv), 5 - (vi) |
| D. | 1 - (i), 2 - (ii), 3 - (iii), 4 - (vii), 5 - (v) |
| Answer» B. 1 - (ii), 2 - (i), 3 - (iii), 4 - (iv), 5 - (v) | |
| 1699. |
Largest unicellular eukaryotic plant is: |
| A. | Egg of Rhinodon |
| B. | Acetabularia |
| C. | Nerve cells of squid |
| D. | RBC of Amphiuma |
| Answer» C. Nerve cells of squid | |
| 1700. |
Correct sequence of layers of bacterial cell envelope is: |
| A. | cell membrane \[\to \] glycocalyx\[\to \] cell wall |
| B. | glycocalyx \[\to \] cell wall \[\to \] cell membrane |
| C. | cell wall \[\to \] glycocalyx \[\to \] cell membrane |
| D. | glycocalyx \[\to \] cell membrane \[\to \] cell wall |
| Answer» C. cell wall \[\to \] glycocalyx \[\to \] cell membrane | |