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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.
| 1701. |
Which of the following substances is most likely to permeate a membrane by diffusing directly through the lipid bilayer? |
| A. | \[{{K}^{+}}\] |
| B. | Glucose |
| C. | \[C{{l}^{-}}\] |
| D. | \[{{O}_{2}}\] |
| Answer» E. | |
| 1702. |
Match column-I with column-II and choose the correct option. Column-I Column-II A. Tonoplast I. Contain digestive enzyme B. Contractile II. Store metabolic gases vacuole C. Food vacuole III. Excretion D. Air vacuole IV. Transport of ions in plants |
| A. | A-IV; B-III; C-I; D-II |
| B. | A-II; B-III; C-IV; D-I |
| C. | A-IV; B-II; C-III; D-I |
| D. | A-I; B-III; C-II; D-IV |
| Answer» B. A-II; B-III; C-IV; D-I | |
| 1703. |
Match column-I with column-II and select the correct option. Column-I Column-II A. Golgi apparatus I. Storage B. Mitochondria II. Photosynthesis C. Vacuoles III. Transport D. Grana IV. Secretion V. Respiration |
| A. | A-IV; B-V; C-I: D-II |
| B. | A-I; B-II; C-IV: D-III |
| C. | A-IV; B-I; C-II: D-III |
| D. | A-I; B-II; C-III: D-IV |
| Answer» B. A-I; B-II; C-IV: D-III | |
| 1704. |
Which of the following statement(s) depict the fundamental features of cell theory? (i) All cells share similar chemistry and physiology. (ii) All living organisms are composed of cells and their products. (iii) Each cell is made up of a small mass of protoplasm containing a nucleus inside and a plasma membrane with or without a cell wall outside. (iv) Activities of an organism are the sum total of activities and interaction of its constituents cells. |
| A. | (i) Only (i) is correct |
| B. | (ii) and (iii) are correct |
| C. | (ii), (iii) and (iv) are correct |
| D. | (iii) All are correct |
| Answer» E. | |
| 1705. |
Channel proteins allow ions that would not normally pass through the cell membrane to go through the channel. What properties of the proteins are responsible for this? |
| A. | The channels are often composed of charged or polar R groups. |
| B. | The channels are often composed of hydrophobic R groups. |
| C. | Both and |
| D. | None of the above |
| Answer» B. The channels are often composed of hydrophobic R groups. | |
| 1706. |
According to Danielli and Davson, the phospholipid bilayer is covered on either side by: (i) Hydrated globular proteins (ii) a-globular proteins (iii) (3-globular proteins (iv) Only spectrin protein with sialic acid |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | (iii) and (iv) |
| D. | (i) and (iv) |
| Answer» B. (ii) and (iii) | |
| 1707. |
Three morphological forms of golgi complex are: |
| A. | Lamellae, tubules and vesicles |
| B. | Cistemae, tubules and vesicles |
| C. | Cistemae, tubules and lamellae |
| D. | Granum, thylakoids and vesicles |
| Answer» C. Cistemae, tubules and lamellae | |
| 1708. |
Match column-I (scientists) with column-II (discovery) and select the correct option. Column-I Column-II A. Leeuwenhoek I. First saw and described a living cell. B. Robert Brown II. Presence of cell wall is unique to plant cells. C. Schleiden III. Discovered the nucleus. D. Schwann IV. All plants are composed of different kind of cells. |
| A. | A-I; B-III; C-IV; D-II |
| B. | A-I; B-III; C-II; D-IV |
| C. | A-III; B-I; C-IV; D-II |
| D. | A-I; B-IV; C-II; D-III |
| Answer» B. A-I; B-III; C-II; D-IV | |
| 1709. |
Living beings are made up of cells. This statement belongs to: |
| A. | Lamarck |
| B. | Von Helmont |
| C. | Hugo de Vries |
| D. | Schleiden and Schwann |
| Answer» E. | |
| 1710. |
Cristae are found in: |
| A. | Surface of grana |
| B. | Surface of plasma membrane |
| C. | Wall of mitochondria |
| D. | Nuclear membrane |
| Answer» D. Nuclear membrane | |
| 1711. |
The cells are held together by a Ca-pectate layer called. |
| A. | primary cell wall |
| B. | secondary cell wall |
| C. | middle lamella |
| D. | tertiary cell wall |
| Answer» D. tertiary cell wall | |
| 1712. |
Arrange the following steps in a correct sequence as per Gram's staining technique. (i) Treatment with 0.5% iodine solution. (ii) Washing with water. (iii) Treatment with absolute alcohol/acetone. (iv) Staining with weak alkaline solution of crystal violet. The correct sequence is: |
| A. | (ii), (i), (iv), (iii) |
| B. | (iv), (i), (ii), (iii) |
| C. | (iii), (ii), (i), (iv) |
| D. | (iv), (iii), (ii), (i) |
| Answer» C. (iii), (ii), (i), (iv) | |
| 1713. |
Order the following terms in a way that depicts how vesicles are transported to membranes, are likely to move through the cell. (i) ER (ii) Nuclear envelope (iii) Golgi apparatus (iv) Vesicle (v) Plasma membrane. |
| A. | (i), (ii), (iii), (iv), (v) |
| B. | (i), (iv), (ii), (iv), (iii), (iv), (v) |
| C. | (ii), (iii), (i), (iv), (v) |
| D. | (ii), (i), (iv), (iii), (iv), (v) |
| Answer» E. | |
| 1714. |
Peroxisomes, in plant cells, are involved in: |
| A. | Photooxidation |
| B. | Photorespiration |
| C. | Photophosphorylation |
| D. | Photolysis of water |
| Answer» C. Photophosphorylation | |
| 1715. |
Function of centriole is: |
| A. | Formation of spindle fibres |
| B. | Formation of nucleolus |
| C. | Initiation of cell division |
| D. | Formation of cell plate |
| Answer» B. Formation of nucleolus | |
| 1716. |
In which of the following organisms, plastids are not found? |
| A. | Blue green algae |
| B. | Bacteria |
| C. | Fungi |
| D. | All of these |
| Answer» E. | |
| 1717. |
What would happen if lysosomes get ruptured inside the cells in which they are present? |
| A. | Cells will swell |
| B. | Cells will shrink |
| C. | Cells will die |
| D. | Nothing would happen |
| Answer» D. Nothing would happen | |
| 1718. |
Identify the given figures (1, 2 & 3) showing meiotic phases and select the correct option. |
| A. | 1-Metaphase 2-Anaphase 3-Telophase |
| B. | 1-Metaphase-I 2-Anaphase-I 3-Telophase-I |
| C. | 1-Metaphase-II 2-Anaphase-II 3-Telophase-II |
| D. | 1-Anaphase-I 2-Metaphase-I 3-Telophase-I |
| Answer» C. 1-Metaphase-II 2-Anaphase-II 3-Telophase-II | |
| 1719. |
Identify the statement that does not hold true for a eukaryotic cell? |
| A. | Presence of 80S type of ribosome in the mitochondria. |
| B. | Presence of 80S type of ribosome in the cytoplasm. |
| C. | Presence of mitochondria containing circular DNA. |
| D. | Presence of membrane bound organelles. |
| Answer» B. Presence of 80S type of ribosome in the cytoplasm. | |
| 1720. |
Phragmoplast is the precursor of: |
| A. | Chloroplast |
| B. | Chromoplast |
| C. | Cell plate |
| D. | Leucoplast |
| Answer» D. Leucoplast | |
| 1721. |
In mitosis, duplication of chromosomes occurs during: |
| A. | Interphase |
| B. | Prophase |
| C. | Metaphase |
| D. | Telophase |
| Answer» B. Prophase | |
| 1722. |
How many reduction divisions are necessary for the formation of 200 grains of wheat? |
| A. | 250 |
| B. | 150 |
| C. | 200 |
| D. | 360 |
| Answer» B. 150 | |
| 1723. |
Constancy of the chromosome number in sexually producing generation is brought by the process of: |
| A. | Meiosis |
| B. | Mitosis |
| C. | Amitosis |
| D. | None of these |
| Answer» C. Amitosis | |
| 1724. |
Repulsion of homologous chromosomes takes place in: |
| A. | Zygotene |
| B. | Leptotene |
| C. | Diakinesis |
| D. | Diplotene |
| Answer» E. | |
| 1725. |
Homologous chromosomes show maximum attraction during: |
| A. | Leptotene |
| B. | Zygotene |
| C. | Pachytene |
| D. | Diplotene |
| Answer» D. Diplotene | |
| 1726. |
What is the number of DNA strand in chromosome at G^ stage of cell cycle? |
| A. | One |
| B. | Two |
| C. | Four |
| D. | Eight |
| Answer» C. Four | |
| 1727. |
In mitosis nucleolus and nuclear membrane disappear at: |
| A. | Interphase |
| B. | Prophase |
| C. | Metaphate |
| D. | Telophase |
| Answer» C. Metaphate | |
| 1728. |
Number of chromosomes in a zygote may be indicated by: |
| A. | 4x |
| B. | x |
| C. | 3x |
| D. | 2x |
| Answer» E. | |
| 1729. |
Number of chromosomes in human karyotype is: |
| A. | 48 |
| B. | 44 |
| C. | 46 |
| D. | 23 |
| Answer» D. 23 | |
| 1730. |
Four different steps that occur during meiosis are given in the following list. (i). Complete separation of chromatids. (ii). Pairing of homologous chromosomes. (iii). Lining up of paired chromosomes on equator. (iv). Crossing over between chromatids. These steps would occur in the order: |
| A. | (ii), (iii), (iv), (i) |
| B. | (iii), (ii), (iv), (i) |
| C. | (ii), (iv), (iii), (i) |
| D. | (iii), (i), (ii), (iv) |
| Answer» D. (iii), (i), (ii), (iv) | |
| 1731. |
Each chromosome composed of one chromatid in: |
| A. | Anaphase - I |
| B. | Anaphase - II |
| C. | Metaphase - I |
| D. | Metaphase - II |
| Answer» C. Metaphase - I | |
| 1732. |
Colchicine prevents the mitosis of cells at which of the following stage? |
| A. | Anaphase |
| B. | Metaphase |
| C. | Prophase |
| D. | Interphase |
| Answer» C. Prophase | |
| 1733. |
During mitosis, after the separation of centromeres, the chromatids move towards opposite poles of the spindle. Name the term used for these chromatids. |
| A. | Daughter chromosomes |
| B. | Kinetochores |
| C. | Half spindles |
| D. | Centrosomes |
| Answer» B. Kinetochores | |
| 1734. |
During cell division, sometimes there will be failure of separation of sister chromatids. This event is called. |
| A. | Interference |
| B. | complementation |
| C. | coincidence |
| D. | non-disjunction |
| Answer» E. | |
| 1735. |
If the \[\operatorname{n} =16\] in plant cell then what is possible in metaphase - I of meiosis? |
| A. | 32 bivalents |
| B. | 16 tetravalents |
| C. | 16 bivalents |
| D. | 32 bivalents |
| Answer» D. 32 bivalents | |
| 1736. |
If a grasshopper cell contained 200 units of DNA during\[{{G}_{2}}\], what would be the quantity of DNA in one of the grasshopper cells at the end of telophase II of meiosis? |
| A. | 50 units |
| B. | 100 units |
| C. | Between 50 and 100 units |
| D. | 200 units |
| Answer» B. 100 units | |
| 1737. |
Which cell division is found during cleavage? |
| A. | Amitosis |
| B. | Mitosis |
| C. | Closed mitosis |
| D. | Meiosis |
| Answer» D. Meiosis | |
| 1738. |
When dividing cells are observed under a light microscope, chromosomes become visible in: |
| A. | Interphase |
| B. | S-phase |
| C. | Prophase |
| D. | \[{{G}_{1}}-phase\] |
| Answer» D. \[{{G}_{1}}-phase\] | |
| 1739. |
Programmed cell death (apoptosis): |
| A. | Occurs in cells that have been deprived of essential nutrients. |
| B. | Occurs only in cells that have damaged DNA. |
| C. | Is a natural process during development? |
| D. | Is signaled by the initiated mitosis. |
| Answer» D. Is signaled by the initiated mitosis. | |
| 1740. |
Match the description given in column-I with their stages given in column-II and identify the correct answer. Column-I Column-II A. Initiation of the assembly of mitotic spindle I. Anaphase B. Proteins are synthesized in preparation for mitosis while cell growth continues. II. Prophase C. Spindle fibres attach to kinetochores of chromosomes. III. Interphase D. Movement of chromatids towards opposite poles IV. Metaphase |
| A. | A - II; B - III; C - IV; D - I |
| B. | A - III; B - II; C - I; D - IV |
| C. | A - I; B - III; C - II; D - IV |
| D. | A - IV; B - III; C - I; D - II |
| Answer» B. A - III; B - II; C - I; D - IV | |
| 1741. |
Which division maintains genetic similarity? |
| A. | Mitosis |
| B. | Meiosis |
| C. | Amitosis |
| D. | Reduction division |
| Answer» B. Meiosis | |
| 1742. |
Meiosis takes place in: |
| A. | Apical meristem |
| B. | Intercalary meristem |
| C. | Reproductive cells |
| D. | Vegetative cells |
| Answer» D. Vegetative cells | |
| 1743. |
Which of the following human cells unlikely to |
| A. | Nerve cell |
| B. | Skin cell |
| C. | Cancer cell |
| D. | Cell from an embryo |
| Answer» B. Skin cell | |
| 1744. |
?Bouquet-stage? occur in which sub stages of prophase I: |
| A. | Leptotene |
| B. | Zygotene |
| C. | Pachytene |
| D. | Diplotene |
| Answer» B. Zygotene | |
| 1745. |
Meiosis in AaBb will produce gametes: |
| A. | AB, aB, Ab, ab |
| B. | AB, ab |
| C. | Aa, bb |
| D. | Aa, Bb |
| Answer» B. AB, ab | |
| 1746. |
A zoologist examined an intestine cell from a crayfish and counted 200 chromosomes, each consisting of 2 chromatids, at prophase I of mitosis. What would he expect to see in each of the four cells at telophase II of meiosis if he looked in the crayfish ovary? |
| A. | 50 chromosomes, each consisting of 2 chromatids |
| B. | 50 chromosomes, each consisting of 1 chromatid |
| C. | 100 chromosomes, each consisting of 2 chromatids |
| D. | 100 chromosomes, each consisting of 1 chromatid |
| Answer» E. | |
| 1747. |
The diagram shows the nuclear contents of a cell. Which one of the following option is correct?Number of pairs of homologous chromosomesNumber of chromatidsNumber of centromeres |
| A. | 3612 |
| B. | 3126 |
| C. | 6612 |
| D. | 6126 |
| Answer» C. 6612 | |
| 1748. |
If the number of bivalents are 8 in metaphase-I, what shall be the number of chromosomes in daughter cells after meiosis -1 and meiosis - II respectively? |
| A. | 8 and 4 |
| B. | 4 and 4 |
| C. | 8 and 8 |
| D. | 16 and 8 |
| Answer» D. 16 and 8 | |
| 1749. |
Fully differentiated cells which do not divide are supposed to be in: |
| A. | \[{{G}_{1}}-phase\] |
| B. | \[{{G}_{2}}-phase\] |
| C. | S - phase |
| D. | \[{{G}_{0}}-phase\] |
| Answer» E. | |
| 1750. |
After meiosis - I, the two chromatids of a chromosome are: |
| A. | Genetically similar |
| B. | Genetically different |
| C. | There occurs only one chromatid in each chromosome |
| D. | None of the above |
| Answer» C. There occurs only one chromatid in each chromosome | |