MCQOPTIONS
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MCQOPTIONS
This section includes 639 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 601. |
Which is the most important group of decomposer? |
| A. | Bacteria |
| B. | Virus |
| C. | Insects |
| D. | Enzyme |
| Answer» B. Virus | |
| 602. |
To which category ‘Hawk’ can be classified? |
| A. | Primary consumer |
| B. | Secondary consumer |
| C. | Tertiary consumer |
| D. | Quaternary consumer |
| Answer» D. Quaternary consumer | |
| 603. |
All plants are herbivores. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 604. |
On what category consumers are classified into? |
| A. | Herbivore |
| B. | Carnivore |
| C. | Omnivore |
| D. | Herbivore, carnivore, omnivore and scavenger |
| Answer» E. | |
| 605. |
What is called for an organism that feeds on other organisms? |
| A. | Insects |
| B. | Consumer |
| C. | Producer |
| D. | Herbivore |
| Answer» C. Producer | |
| 606. |
How many types of secondary consumers are there? |
| A. | One |
| B. | Two |
| C. | Three |
| D. | Four |
| Answer» C. Three | |
| 607. |
What is the food habitant of secondary consumers? |
| A. | Feed on primary consumers |
| B. | Depends on tertiary consumers |
| C. | Produce their own energy |
| D. | Eat dead animals |
| Answer» B. Depends on tertiary consumers | |
| 608. |
In the following tropic levels of plants followed by rabbit flowed by fox. Here fox belongs to______________ |
| A. | Primary producer |
| B. | Primary consumers |
| C. | Secondary producers |
| D. | Secondary consumers |
| Answer» E. | |
| 609. |
To which classification predators are classified? |
| A. | Primary consumer |
| B. | Secondary consumer |
| C. | Tertiary consumer |
| D. | Tertiary producer |
| Answer» D. Tertiary producer | |
| 610. |
What is another name for tertiary consumers? |
| A. | Decomposers |
| B. | Producers |
| C. | Herbivores |
| D. | Apex predators |
| Answer» E. | |
| 611. |
An ecosystem which can be easily damaged but can recovered after some time if damaging effect stops will be having ____________________ |
| A. | High stability and high resilience |
| B. | High stability and low resilience |
| C. | Low stability and low resilience |
| D. | Low stability and high resilience |
| Answer» E. | |
| 612. |
Which one of the following is not a gaseous biogeochemical cycle in an ecosystem? |
| A. | Carbon cycle |
| B. | Phosphorous cycle |
| C. | Sulfur cycle |
| D. | Nitrogen cycle |
| Answer» C. Sulfur cycle | |
| 613. |
Transfer of energy from source of plants through a series of organism is known as ________________ |
| A. | Food web |
| B. | Energy cycle |
| C. | Food chain |
| D. | Biological system |
| Answer» D. Biological system | |
| 614. |
The type of ecosystem with the highest mean plant productivity is _______________ |
| A. | Tundra |
| B. | Temperate grassland |
| C. | Desert |
| D. | Tropical rain forest |
| Answer» E. | |
| 615. |
Pyramids of number in grassland ecosystem are inverted. |
| A. | True |
| B. | False |
| C. | May be True or False |
| D. | Can't say |
| Answer» C. May be True or False | |
| 616. |
Refer to the given figure and select the incorrect statement(s).(i) The part labelled P is found in plant cell only.(ii) The part labelled Q is cell wall, which provides rigidity to a plant cell.(iii) The part labelled R is the controlling centre.(iv) The part labelled R gets its shape from part labelled P. |
| A. | (iv) only |
| B. | (i) and (iv) only |
| C. | Reversible |
| D. | (iii) only |
| Answer» C. Reversible | |
| 617. |
Which of the following components is/ are present in the nervous system? |
| A. | Brain |
| B. | Spinal cord |
| C. | First is fast and second is slow change |
| D. | All of these |
| Answer» E. | |
| 618. |
Which of the following cells are long cells? |
| A. | Reproductive cells |
| B. | Nerve cells |
| C. | Bursting of cracker |
| D. | Cuboidal cells |
| Answer» C. Bursting of cracker | |
| 619. |
Which of the following organelles is responsible for mechanical support and enzyme transport? |
| A. | Mitochondria |
| B. | Endoplasmic reticulum |
| C. | Are not affected by heating |
| D. | Golicomplex |
| Answer» C. Are not affected by heating | |
| 620. |
Which of the following organelles act as the digestive system within the cell? |
| A. | Golgi bodies |
| B. | Centrosomes |
| C. | Iron |
| D. | Mitochondria |
| Answer» D. Mitochondria | |
| 621. |
Refer to the given figure and select the correct statement regarding it. (i) P is an important site for protein synthesis. (ii) R transfers the characteristics of a cell that are formed during cell division. (iii) Q is a dense fluid like agranular substance. (iv) P contains DNA while R contains RNA. |
| A. | (i) and (ii) only |
| B. | (i), (ii) and (iv) only |
| C. | The heating of water |
| D. | (iii) and (iv) only |
| Answer» B. (i), (ii) and (iv) only | |
| 622. |
Which of the following is the largest organelle in the cell? |
| A. | Nucleus |
| B. | Mitochondria |
| C. | irreversible change |
| D. | Lysosomes |
| Answer» B. Mitochondria | |
| 623. |
Which of the following sets contains unicellular organisms only? |
| A. | Amoeba, Allium, Saccharomyces |
| B. | Euglena, Chlorella, Escherichia |
| C. | Change in chemical composition. |
| D. | Rhizopus, Amoeba, Solatium |
| Answer» C. Change in chemical composition. | |
| 624. |
Entamoeba and Giardia are: |
| A. | Multicellular, prokaryotic protozoan |
| B. | Unicellular, eukaryotic protozoan |
| C. | Knitting of sweater. |
| D. | Multicellular, eukaryotic amoeba |
| E. | None of these |
| Answer» C. Knitting of sweater. | |
| 625. |
Which one of the following statements is correct? (i) They have membrane bound organelles including a nucleus. (ii) Bacteria are examples of prokaryotic cells. (iii) Lysosomes are present in eukaryotic cells. (iv) Fungi are prokaryotes. |
| A. | (i) and (ii) |
| B. | (ii), (iii) and (iv) |
| C. | reversible change. |
| D. | (iii) and (iv) |
| E. | None of these |
| Answer» D. (iii) and (iv) | |
| 626. |
Protoplasm inside the nucleus is called: |
| A. | Cytoplasm |
| B. | Elaioplast |
| C. | 123Breaking of a glassBanking a cakeBurning of LPG in kitchen |
| D. | Amyloplast |
| E. | None of these |
| Answer» D. Amyloplast | |
| 627. |
Plastids present in roots, seeds and underground stem of a plant is: |
| A. | Chloroplast |
| B. | Leucoplast |
| C. | Statement 1 is true and statement 2 is false. |
| D. | Chlorophyll |
| E. | None of these |
| Answer» C. Statement 1 is true and statement 2 is false. | |
| 628. |
_____ is carried out by ribosomes. |
| A. | Lipid synthesis |
| B. | Protein synthesis |
| C. | 1 and 4 only |
| D. | Photosynthesis |
| E. | None of these |
| Answer» C. 1 and 4 only | |
| 629. |
Different colours of flowers in plants is due to the presence of: |
| A. | Cell membrane |
| B. | Cell wall |
| C. | periodic change |
| D. | Mitochondria |
| E. | None of these |
| Answer» D. Mitochondria | |
| 630. |
The membrane which binds the chromosomes and nucleolus inside the nucleus is: |
| A. | Cytoplasm |
| B. | Nucleoplasm |
| C. | P-(ii), Q-(i), R-(iv), S-(iii) |
| D. | Cell membrane |
| E. | None of these |
| Answer» D. Cell membrane | |
| 631. |
Red blood cells do not have: (i) Cell membrane (ii) Cytoplasm (iii) Plastid (iv) Nucleus |
| A. | (i) and (ii) |
| B. | (ii) and (iii) |
| C. | Process 1 is a reversible, physical change while process 2 is an irreversible, chemical change. |
| D. | (i) and (iv) |
| E. | None of these |
| Answer» D. (i) and (iv) | |
| 632. |
The Cell membrane controls the movement of substances: |
| A. | Into the cells only. |
| B. | Out of the cells only. |
| C. | PQ Irreversible changeIrreversible change |
| D. | In no direction |
| E. | None of these |
| Answer» D. In no direction | |
| 633. |
Which one of the following represents the correct level of organisation ranging from simplest to most complex? |
| A. | Cells Tissues Organs Organ systems Organisms |
| B. | Tissues Organs Cells Organisms Organ system |
| C. | Baking of chapati. |
| D. | Cells Organs Tissues Organ systems Organisms |
| E. | None of these |
| Answer» B. Tissues Organs Cells Organisms Organ system | |
| 634. |
____ is the unit of inheritance in the living organisms. |
| A. | Ribosome |
| B. | Gene |
| C. | Leaf |
| D. | Cell wall |
| E. | None of these |
| Answer» C. Leaf | |
| 635. |
Which of the following is a type of plastid? |
| A. | Chloroplasts |
| B. | Chromoplasts |
| C. | Change in internal structure. |
| D. | All the above |
| E. | None of these |
| Answer» E. None of these | |
| 636. |
Match the following: Column A Column B (I) Laminaria [A] Protozoa (II) Paramecium [B] Bacteria (III) Penicillium [C] Algae (IV) Streptococcus [D] Fungi |
| A. | (I - D), (II - A), (III - B), (IV - C) |
| B. | (I - C), (II - D), (III - A), (IV - B) |
| C. | Only (i) and (iii) |
| D. | (I - E), (II - A), (III - D), (IV - B) |
| E. | None of these |
| Answer» E. None of these | |
| 637. |
Given figure is showing: |
| A. | A bacterium |
| B. | a virus |
| C. | can be easily reversed |
| D. | An algae |
| E. | None of these |
| Answer» C. can be easily reversed | |
| 638. |
Which one of the following is not included in the nucleus? |
| A. | Endoplasmic reticulum |
| B. | DNA |
| C. | Burning of a candle |
| D. | Chromosome |
| E. | None of these |
| Answer» B. DNA | |
| 639. |
The liquid in the nucleus is: |
| A. | Nuclear membrane |
| B. | Nucleoplasm |
| C. | Dissolving salt in water |
| D. | Chromosome |
| E. | None of these |
| Answer» C. Dissolving salt in water | |