MCQOPTIONS
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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 3451. |
The process by which water is forcibly pushed beyond endodermis of root is known as ......... . |
| A. | Apoplast pathway |
| B. | Symplast pathway |
| C. | Diffusion |
| D. | Transmembrane transport |
| Answer» E. | |
| 3452. |
An animalcell placed in pure water will |
| A. | Swell up and brust |
| B. | Shrink and die |
| C. | Shrink and undergo plasmolysis |
| D. | Swell up and develop turgidity |
| Answer» B. Shrink and die | |
| 3453. |
By which type of transpiration largest amount of water is lost ? |
| A. | Guttation |
| B. | Cuticular |
| C. | Stomata |
| D. | Lenticular |
| Answer» D. Lenticular | |
| 3454. |
Chromosome in which centromere is located at the end is.... |
| A. | Acrocentric |
| B. | Telo centric |
| C. | Meta centric |
| D. | Sub-meta centric |
| Answer» C. Meta centric | |
| 3455. |
In human which cell lacks nucleus. |
| A. | Lymphocyte |
| B. | RBC |
| C. | Monocytes |
| D. | Neutrophils |
| Answer» C. Monocytes | |
| 3456. |
Prokaryotic cells have which architectural regions? |
| A. | Cell |
| B. | Appendages |
| C. | Nucleus |
| D. | a-b-c,all |
| Answer» C. Nucleus | |
| 3457. |
It possess Flagella. |
| A. | Paramoecium |
| B. | Euglena |
| C. | Amoeba |
| D. | Yeast |
| Answer» C. Amoeba | |
| 3458. |
Bacteria possess small DNA other than circular DNA which is called as... |
| A. | Cosmid |
| B. | Plasmid |
| C. | Plastid |
| D. | Starid |
| Answer» C. Plastid | |
| 3459. |
The materials essential for dark reaction are located in |
| A. | Circular-DNA |
| B. | Thylakoids |
| C. | Stroma |
| D. | Ribosomes |
| Answer» C. Stroma | |
| 3460. |
Which is the example of unicellular organism? |
| A. | Chlamydomona |
| B. | Spirogyra |
| C. | Mushroom |
| D. | Chiton |
| Answer» B. Spirogyra | |
| 3461. |
It directs formation of the bipolar spindle during cell division. |
| A. | Golgi body |
| B. | Centriole |
| C. | Ribosome |
| D. | Cilia |
| Answer» C. Ribosome | |
| 3462. |
In mitochodria, it contains F-particles. |
| A. | Matrix |
| B. | Cristae |
| C. | Outer layer |
| D. | a-b-c,all |
| Answer» C. Outer layer | |
| 3463. |
It shows presence of Nucleoid. |
| A. | Plant cell |
| B. | Bacteria |
| C. | Animal cell |
| D. | Virus |
| Answer» C. Animal cell | |
| 3464. |
It actively synthesized r-RNA. |
| A. | Nucleoplasm |
| B. | Nucleolus |
| C. | Nucleus |
| D. | a-b-c,all |
| Answer» C. Nucleus | |
| 3465. |
The cells involved in large amount of lipid synthesis,do not possess this orgenelle on Endoplasmicreticulum. |
| A. | Mitochondrion |
| B. | Ribosomes |
| C. | Golgi apparatus |
| D. | lysosome |
| Answer» C. Golgi apparatus | |
| 3466. |
Who mentioned that cells had a thin layer around them? |
| A. | Schwann |
| B. | Virchow |
| C. | Schleiden |
| D. | Robert Hook |
| Answer» B. Virchow | |
| 3467. |
The association of more than one ribosome with a single molecule of m-RNA complex is called as... |
| A. | Polypeptide |
| B. | Polysome |
| C. | Polymer |
| D. | Poly Saccharide |
| Answer» C. Polymer | |
| 3468. |
Which structure possess flagellin protein? |
| A. | Muscles fiber |
| B. | Flagellum |
| C. | Pilli |
| D. | a,b,c-all |
| Answer» C. Pilli | |
| 3469. |
The unit of phloem in which nucleus is absent. |
| A. | Sieve cell |
| B. | Sieve tube |
| C. | Companion cell |
| D. | Phloem parenchyma |
| Answer» C. Companion cell | |
| 3470. |
Who mention that the presence of a cell wall is an unique character of the plant cell? |
| A. | Schwann |
| B. | Virchow |
| C. | Schleiden |
| D. | Robert Brown |
| Answer» B. Virchow | |
| 3471. |
Microfilaments are made up of |
| A. | Fat |
| B. | Protein |
| C. | Carbohydrates |
| D. | Nucleic acid |
| Answer» C. Carbohydrates | |
| 3472. |
In each chromosome centromere possessing disc shaped structure is |
| A. | Satellite |
| B. | Kinetochore |
| C. | Long arm |
| D. | Short arm |
| Answer» C. Long arm | |
| 3473. |
No membrane surrouds in this organelle. |
| A. | Lysosome |
| B. | Nucleolus |
| C. | Golgi body |
| D. | Nucleus |
| Answer» C. Golgi body | |
| 3474. |
It is the Smallest Cell. |
| A. | Bacteria |
| B. | Mycoplasm |
| C. | Yeast |
| D. | Blue green algae |
| Answer» C. Yeast | |
| 3475. |
The cell wall of fungi is made up of which substance? |
| A. | Starch |
| B. | Chitin |
| C. | Cellulose |
| D. | Pectin |
| Answer» C. Cellulose | |
| 3476. |
The cell wall of algae is made up of which substance? |
| A. | Protein |
| B. | Mannans |
| C. | Lipid |
| D. | a,b,c-all |
| Answer» C. Lipid | |
| 3477. |
Which organelle is not considered as a part of Endomembrane system? |
| A. | Vacuole |
| B. | Chloroplast |
| C. | Endoplasmic reticulum |
| D. | Lyso some |
| Answer» C. Endoplasmic reticulum | |
| 3478. |
Post mitotic gap phase and synthesis phase of cell cycle are also respectively referred to as : |
| A. | G2 and |
| B. | G1 and S |
| C. | G1 and G2 |
| D. | S and G2 |
| Answer» C. G1 and G2 | |
| 3479. |
Who proposed the cell theory. |
| A. | Singer and Nicholsen |
| B. | Schwann and schleiden |
| C. | Hook and Brown |
| D. | Robertson |
| Answer» C. Hook and Brown | |
| 3480. |
Who proposed that new cells arise through cell division of pre-existing cells. |
| A. | Robert Hook |
| B. | Rudolf Virchow |
| C. | Robert Brown |
| D. | Singer |
| Answer» C. Robert Brown | |
| 3481. |
Pick out the correct statements : |
| A. | Synapsis of homologous chromosomes takes place during prophase-I of meiosis. |
| B. | Division of centromeres takes place during anaphase I of meiosis. |
| C. | Spindle fibres disappear completely in telophase of mitosis. |
| D. | Nucleoli reappear at telophase I of meiosis |
| Answer» E. | |
| 3482. |
During mitotic metaphase : |
| A. | crossing over occurs |
| B. | chromosomes are divided |
| C. | chromosomes become thread like and condensed |
| D. | chromosomes are located at equator. |
| Answer» E. | |
| 3483. |
Assertion (A) : Phase of cell division is also known as dividing phase. Reason (R) : In mitotic phase new cells are produced from pre-existing cells through meiosis division. |
| A. | Both A and R are true and R is the correct explanation of A. |
| B. | Both A and R are true but the R is not the correct explanation of A. |
| C. | A is true statement but R is false. |
| D. | Both A and R are false. |
| Answer» D. Both A and R are false. | |
| 3484. |
G2 phase is between : |
| A. | end of mitosis and start of S phase |
| B. | end of S phase and start of mitosis |
| C. | start of S phase and start of mitosis |
| D. | end of S phase and end of mitosis |
| Answer» C. start of S phase and start of mitosis | |
| 3485. |
Synapsis occurs between : |
| A. | m-RNA and ribosome |
| B. | spindle fibres and centromere |
| C. | two homologous chromosomes |
| D. | a male and a female gamete |
| Answer» D. a male and a female gamete | |
| 3486. |
Cell cycle is divided in stages as given below Which is the correct pair ? |
| A. | C – kietochore |
| B. | D – synthesis phase |
| C. | A – cytokinesis |
| D. | B – metaphase |
| Answer» C. A – cytokinesis | |
| 3487. |
In diploid living organisms crossing over is responsible for ? |
| A. | Recombination of linked gene |
| B. | Dominancy of genes |
| C. | Linkage between genes |
| D. | No Segregation of genes |
| Answer» B. Dominancy of genes | |
| 3488. |
How many meiotic stage are essential for producing 28 cells from one cell ? |
| A. | 7 |
| B. | 14 |
| C. | 28 |
| D. | 64 |
| Answer» B. 14 | |
| 3489. |
During gamete formation, the enzyme recombinase participate during : |
| A. | Anaphase-II |
| B. | Prophase-I |
| C. | Prophase-II |
| D. | Mataphase-I |
| Answer» C. Prophase-II | |
| 3490. |
During meiosis crossing over occurs between which part of homologous chromosome ? |
| A. | sister chromatid |
| B. | nonsister chromatids |
| C. | genes |
| D. | alleles |
| Answer» C. genes | |
| 3491. |
It is responsible for begininig of the life of organisms. |
| A. | Tissue |
| B. | Zygote |
| C. | Cell |
| D. | Embryonic layer |
| Answer» C. Cell | |
| 3492. |
Select the correct option with respect to mitosis. |
| A. | Golgi complex and endoplasmic reticulum are still visible at the end of prophase. |
| B. | Chromosomes move to the spindle equator and get aligned along equatorial plate inmetaphase. |
| C. | Chromatids separate but remain in the centre of the cell in anaphase. |
| D. | Chromatids start moving towards opposite poles in telophase. |
| Answer» C. Chromatids separate but remain in the centre of the cell in anaphase. | |
| 3493. |
In meiosis the daughter cells are not similar to that of parent because of : |
| A. | crossing over |
| B. | Synapsis |
| C. | both (a) and (b) |
| D. | none of these |
| Answer» B. Synapsis | |
| 3494. |
What would be the number of chromosomes of the aleurone cells of a plant with 42 chromosomes in its root tip cells ? |
| A. | 84 |
| B. | 21 |
| C. | 42 |
| D. | 63 |
| Answer» E. | |
| 3495. |
Number of chromosomes are maintained from generation to generation by : |
| A. | Mitotic division |
| B. | Meiosis division |
| C. | Division |
| D. | Metamorphosis |
| Answer» C. Division | |
| 3496. |
What is correct ? |
| A. | DNA – content become double during G1 phase. |
| B. | Duration of interphase is short as compared to M – phase. |
| C. | G2 – phase follows mitotic phase. |
| D. | DNA – replication occurs in S – phase. |
| Answer» E. | |
| 3497. |
IN which stage of mitosis division segregation of chromatids occur and they migrate at different polar ends. |
| A. | Prophase |
| B. | Metaphase |
| C. | Anaphas |
| D. | Telophase |
| Answer» D. Telophase | |
| 3498. |
A cell divides every one minute. At this rate of division it can fill a 100 ml of beaker in one hour. How much time does it take to fill a 50 ml beaker ? |
| A. | 30 minute |
| B. | 60 minute |
| C. | 59 minute |
| D. | 32 minute |
| Answer» D. 32 minute | |
| 3499. |
During mitosis nuclear membrane and nucleolus begin to disappear at : |
| A. | Early mataphase |
| B. | Late metaphase |
| C. | Early prophase |
| D. | Late prophase |
| Answer» E. | |
| 3500. |
If you are provided with root-tips of onion in your class and are asked to count the chromosome, which of the following stage can you most conviently look into |
| A. | Telophase |
| B. | Anaphase |
| C. | Prophase |
| D. | Metaphase |
| Answer» E. | |