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MCQOPTIONS
This section includes 6820 Mcqs, each offering curated multiple-choice questions to sharpen your Science knowledge and support exam preparation. Choose a topic below to get started.
| 751. |
If mitochondria stop working, which function cannot be done in the cell? |
| A. | food cravings |
| B. | oxidation of food |
| C. | digestion of food |
| D. | absorption of food |
| Answer» C. digestion of food | |
| 752. |
Point division depends on? |
| A. | on time |
| B. | at temperature |
| C. | on both of the above |
| D. | none of the above |
| Answer» D. none of the above | |
| 753. |
Which of the following cell organelles contain DNA |
| A. | centriole |
| B. | golgi body |
| C. | lysosomes |
| D. | mitochondria |
| Answer» E. | |
| 754. |
physical basis of life |
| A. | nucleus |
| B. | protoplasm |
| C. | meal |
| D. | the cell |
| Answer» C. meal | |
| 755. |
How do lysosomes function? |
| A. | in protein synthesis |
| B. | in processing and packaging |
| C. | in intracellular digestion |
| D. | in fat synthesis |
| Answer» D. in fat synthesis | |
| 756. |
Which of the following is the smallest cell? |
| A. | Mycoplasma |
| B. | ameekha |
| C. | white blood cells |
| D. | red blood cells |
| Answer» B. ameekha | |
| 757. |
On which plant did Mendel do the hybridization experiment? |
| A. | Chicken Drink |
| B. | Pigeon P |
| C. | Garden P |
| D. | wild peas |
| Answer» D. wild peas | |
| 758. |
Which branch of biology deals with the study of inheritance? |
| A. | cell Biology |
| B. | evolution |
| C. | genetics |
| D. | Physiology |
| Answer» D. Physiology | |
| 759. |
Who got the Nobel Prize in 1959 for artificially synthesizing DNA? |
| A. | to Kornberg |
| B. | to okoa |
| C. | to khurana |
| D. | to Nirenberg |
| Answer» B. to okoa | |
| 760. |
What is the monohybrid ratio? |
| A. | 9 : 3 : 3 : 1 |
| B. | 0 . 125694444444444 |
| C. | 0 . 0423611111111111 |
| D. | 0 . 0840277777777778 |
| Answer» C. 0 . 0423611111111111 | |
| 761. |
What is meant by independent divergence? |
| A. | separation of traits from one parent |
| B. | non-separation of traits from one parent |
| C. | ancestral traits |
| D. | separation of paternal traits |
| Answer» B. non-separation of traits from one parent | |
| 762. |
Mendel chose the pea plant because . . . |
| A. | they were cheap |
| B. | they were readily available |
| C. | Contraindications were present in these |
| D. | they have more economic importance |
| Answer» D. they have more economic importance | |
| 763. |
T. What pairs of bases are there in each twist of DNA? |
| A. | 10 |
| B. | 11 |
| C. | 12 |
| D. | 34 |
| Answer» B. 11 | |
| 764. |
Yuktokashi and attached stamens are found in? |
| A. | in lilies |
| B. | in Malvasi |
| C. | in solnancy |
| D. | in the composition |
| Answer» E. | |
| 765. |
Gregor Mendel is famous for rendering which of the following? |
| A. | Cell theory |
| B. | Mutation theory |
| C. | laws of heredity |
| D. | inheritance of acquired traits |
| Answer» D. inheritance of acquired traits | |
| 766. |
Used to obtain seedless fruit? |
| A. | 2 , 4 - D |
| B. | I . A . A |
| C. | 2 , 4 , 5 - T |
| D. | I . A . A u0026 N . A . A |
| Answer» C. 2 , 4 , 5 - T | |
| 767. |
Where is the psychic inflorescence found? |
| A. | in nasturtium |
| B. | in neerium |
| C. | in euphorbia |
| D. | in eucalyptus |
| Answer» D. in eucalyptus | |
| 768. |
Can the approximate age of a tree be found? |
| A. | measuring height |
| B. | measuring the diameter |
| C. | Counting permanent annual rings in main stem |
| D. | Counting the annual rings found in the branch |
| Answer» D. Counting the annual rings found in the branch | |
| 769. |
Which of the following is an example of an arthropod? |
| A. | ephedra |
| B. | Teridium |
| C. | Riksia |
| D. | ulothrix |
| Answer» E. | |
| 770. |
For which invention was Hargobind Khurana honored? |
| A. | for protein synthesis |
| B. | for the synthesis of nitrogenous bases |
| C. | for gene synthesis |
| D. | none of these |
| Answer» B. for the synthesis of nitrogenous bases | |
| 771. |
Hydrophytes float on water due to the presence of which of the following? |
| A. | of air |
| B. | of soft |
| C. | of green tissue |
| D. | of the affirmer |
| Answer» B. of soft | |
| 772. |
There is an exception to Mendel's law? |
| A. | independent matrices |
| B. | influenced |
| C. | purity of gametes |
| D. | Engagement |
| Answer» E. | |
| 773. |
In which method the recently discussed golden rice has been developed? |
| A. | By sexual reproduction |
| B. | by transgenic technology |
| C. | by plant hybridization method |
| D. | by asexual reproduction |
| Answer» C. by plant hybridization method | |
| 774. |
In which part of the flower is the pollen grain produced? |
| A. | woman saffron |
| B. | Stamen |
| C. | Pushpasana |
| D. | bunch |
| Answer» C. Pushpasana | |
| 775. |
Apex meridian is responsible for? |
| A. | to increase the length |
| B. | to increase the thickness |
| C. | to increase softness |
| D. | to increase the cortex |
| Answer» B. to increase the thickness | |
| 776. |
The leaves fall from the branches because of the following. . . |
| A. | completing one's life |
| B. | drop in atmospheric temperature |
| C. | the formation of a dissociation layer on the outside of the cork |
| D. | shortening of daily time |
| Answer» D. shortening of daily time | |
| 777. |
What is the velamen tissue found in orchids? |
| A. | in shoots |
| B. | in roots |
| C. | in leaves |
| D. | in flowers |
| Answer» C. in leaves | |
| 778. |
The age of trees is determined in years. |
| A. | by its weight |
| B. | by its height |
| C. | On the basis of number of annual rings in this |
| D. | by the length of its roots |
| Answer» D. by the length of its roots | |
| 779. |
Lateral meristem is responsible for? |
| A. | to increase the length |
| B. | to increase the thickness |
| C. | to increase softness |
| D. | to increase the cortex |
| Answer» C. to increase softness | |
| 780. |
The number of stomata is reduced and they are sunken? |
| A. | in apocalypse |
| B. | in saline |
| C. | in hydrocephalus |
| D. | in the dead |
| Answer» E. | |
| 781. |
Trees growing by the sea do not have annual rings, because . . . |
| A. | the land is sandy |
| B. | there is climatic variation |
| C. | There is no clear climatic variation |
| D. | There is a lot of moisture in the atmosphere |
| Answer» D. There is a lot of moisture in the atmosphere | |
| 782. |
air is found? |
| A. | in lithophytes |
| B. | in hydrophytes |
| C. | in xerophytes |
| D. | in mesophytes |
| Answer» C. in xerophytes | |
| 783. |
The growth ring is formed due to the activity of which of the following? |
| A. | interstellar stroke |
| B. | Contained Edha's |
| C. | of extrinsic |
| D. | of primary |
| Answer» B. Contained Edha's | |
| 784. |
Who is the factor ofBlack Heartin Potato? |
| A. | lack of copper |
| B. | Boron deficiency |
| C. | lack of oxygen |
| D. | potassium deficiency |
| Answer» D. potassium deficiency | |
| 785. |
What causessoft rotin sweet potato? |
| A. | rhizopus |
| B. | Cleviceps |
| C. | Scleroscopy |
| D. | Phytophthora |
| Answer» B. Cleviceps | |
| 786. |
Which of the following is not a fungal plant disease? |
| A. | groundnut disease |
| B. | red rot disease of sugarcane |
| C. | Green ear disease of millet |
| D. | tobacco mosaic disease |
| Answer» E. | |
| 787. |
Which fungus is responsible for Tikka disease in groundnut? |
| A. | Sarcospora persona |
| B. | Colletotricum falcatum |
| C. | claviceps purpurea |
| D. | Puccinia graminis |
| Answer» B. Colletotricum falcatum | |
| 788. |
Which stage of the insect attacking crops usually causes more damage? |
| A. | Egg |
| B. | pupa |
| C. | caterpillar |
| D. | Imgi |
| Answer» D. Imgi | |
| 789. |
The scientist working on rust disease related to wheat is? |
| A. | NS . C . bold |
| B. | K. C . Mehta |
| C. | Birbal Sawhney |
| D. | D . D . Pant |
| Answer» C. Birbal Sawhney | |
| 790. |
Which fungus is responsible for sugarcane tal rot disease? |
| A. | Sarcospora persona |
| B. | Phytocthera infestance |
| C. | claviceps purpurea |
| D. | Colototricum falcatum |
| Answer» E. | |
| 791. |
What is Agni Neerja disease related to? |
| A. | Apple |
| B. | Orange |
| C. | grapes |
| D. | Coconut |
| Answer» B. Orange | |
| 792. |
Green ear disease is related to which result? |
| A. | Mustard |
| B. | Grain |
| C. | Millet |
| D. | Peanut |
| Answer» D. Peanut | |
| 793. |
Which of the following fungus causes green ear disease in millet? |
| A. | sclerospora gramicola |
| B. | Phytocthera infestance |
| C. | claviceps purpurea |
| D. | Sarcospora persona |
| Answer» B. Phytocthera infestance | |
| 794. |
Plants are made disease resistant |
| A. | by thermal action |
| B. | by hormone action |
| C. | breeding from the wild |
| D. | by action of colchicine |
| Answer» D. by action of colchicine | |
| 795. |
It is not advisable to sleep under trees at night because |
| A. | They release CO₂ at night |
| B. | They leave O₂ at night |
| C. | They release CO₂ and O₂ during the night. |
| D. | none of these |
| Answer» B. They leave O₂ at night | |
| 796. |
What is the respiratory coefficient? |
| A. | ratio of CO to water |
| B. | Ratio of used O₂ and CO₂ volume |
| C. | The ratio of the volume of CO₂ generated and the volume of O₂ used |
| D. | All of the above |
| Answer» D. All of the above | |
| 797. |
Which fungus is responsible for the late blight disease in potato? |
| A. | Sarcospora persona |
| B. | Phytocthera infestance |
| C. | claviceps purpurea |
| D. | sclerospora gramicola |
| Answer» C. claviceps purpurea | |
| 798. |
Which of the following statements about hormones is correct? |
| A. | It is a special organic compound that, in small amounts, affects and regulates growth and metabolic activities. |
| B. | These are also called growth control substances. |
| C. | Its effect is different at different concentrations and different organs. |
| D. | all the above statements are correct |
| Answer» E. | |
| 799. |
Which gas do plants absorb in photosynthesis? |
| A. | Carbon dioxide |
| B. | oxygen |
| C. | nitrogen |
| D. | hydrogen |
| Answer» B. oxygen | |
| 800. |
The wrapping of a pea sprout around a base is a good example. |
| A. | tactile |
| B. | Nash speed |
| C. | Of chemotherapy |
| D. | phototropism |
| Answer» B. Nash speed | |