MCQOPTIONS
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MCQOPTIONS
This section includes 837 Mcqs, each offering curated multiple-choice questions to sharpen your Grade10 knowledge and support exam preparation. Choose a topic below to get started.
| 801. |
Which of the following is true about DNA? |
| A. | it is present in cell nucleus |
| B. | it has single strand |
| C. | it has ribose sugar |
| D. | it is synthesized by RNA |
| Answer» B. it has single strand | |
| 802. |
Which of the following is important in vision? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin B | |
| 803. |
Gelatin is used in the production of |
| A. | industrial items |
| B. | ropes |
| C. | curry |
| D. | bakery items |
| Answer» E. | |
| 804. |
A compound or substance produced by living organisms is called |
| A. | hydrocarbon |
| B. | organic compound |
| C. | natural product |
| D. | artificial product |
| Answer» D. artificial product | |
| 805. |
Deficiency of vitamin B causes |
| A. | night blindness |
| B. | anemia and bleeding gums |
| C. | scurvy |
| D. | rickets and Osteomalacia |
| Answer» C. scurvy | |
| 806. |
Which of the following is not included in the composition of lipids? |
| A. | cholesterol |
| B. | sex hormones |
| C. | vitamins |
| D. | amino acids |
| Answer» E. | |
| 807. |
1g of glucose (C6H12O6) provides energy |
| A. | 10KJ |
| B. | 160KJ |
| C. | 15.6KJ |
| D. | 80KJ |
| Answer» D. 80KJ | |
| 808. |
Which of the following is true about incineration? |
| A. | it consumes all combustible materials |
| B. | it is a clean process |
| C. | it does not produce air pollution |
| D. | it does not generate odor |
| Answer» B. it is a clean process | |
| 809. |
An allotropic form of oxygen comprising three oxygen atoms is called |
| A. | ozone |
| B. | oxidation |
| C. | oxidizing agent |
| D. | reducing agent |
| Answer» B. oxidation | |
| 810. |
Which of the following is not true about nitrogen dioxide? |
| A. | it is reddish brown |
| B. | it has pungent odor |
| C. | it is insoluble in water |
| D. | it is toxic |
| Answer» D. it is toxic | |
| 811. |
Which of the following is not true about sulfur dioxide? |
| A. | it is colorless |
| B. | it is odourless |
| C. | it is an air pollutant |
| D. | it causes breathing difficulties |
| Answer» C. it is an air pollutant | |
| 812. |
Which of the following is true about carbon monoxide? |
| A. | it is poisonous |
| B. | it is insoluble in water |
| C. | it is not an air pollutant |
| D. | it cannot cause death |
| Answer» B. it is insoluble in water | |
| 813. |
Which of the following is required for boosting the immune system that protects against illness? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» D. vitamin D | |
| 814. |
Vitamin C is soluble in |
| A. | fat |
| B. | water |
| C. | ethers |
| D. | phenols |
| Answer» C. ethers | |
| 815. |
Which of the following are called building blocks of all proteins? |
| A. | vitamins |
| B. | amines |
| C. | lipids |
| D. | amino acids |
| Answer» E. | |
| 816. |
Which of the following is not true about DNA? |
| A. | it is present in cell nucleus |
| B. | it has double strand |
| C. | it has ribose sugar |
| D. | it has double helix |
| Answer» D. it has double helix | |
| 817. |
Monosaccharide molecules that can rotate the plane of plane-polarized light to right are called |
| A. | dextrose sugars |
| B. | simple sugars |
| C. | pentose sugars |
| D. | hexose sugars |
| Answer» B. simple sugars | |
| 818. |
Our bodies cannot produce |
| A. | minerals |
| B. | proteins |
| C. | vitamins |
| D. | carbohydrates |
| Answer» D. carbohydrates | |
| 819. |
Source of stearic acid is |
| A. | butter |
| B. | palm oil |
| C. | beef fat |
| D. | olive oil |
| Answer» D. olive oil | |
| 820. |
The two functional groups found in amino acids are |
| A. | alcohols and amines |
| B. | carboxylic acids and alcohols |
| C. | ethers and amines |
| D. | carboxylic acids and amines |
| Answer» E. | |
| 821. |
What happens if fat-soluble vitamins are taken in excess? |
| A. | they cause harm |
| B. | they are readily excreted from the body |
| C. | they don?t causes any harm |
| D. | they get stored in body |
| Answer» B. they are readily excreted from the body | |
| 822. |
The source of Butyric acid is |
| A. | butter |
| B. | palm oil |
| C. | beef fat |
| D. | olive oil |
| Answer» B. palm oil | |
| 823. |
In which of the following regions do aircraft fly? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» B. stratosphere | |
| 824. |
Which of the following is the outermost layer of the atmosphere? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» E. | |
| 825. |
Most of the mass of the atmosphere is contained in |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» B. stratosphere | |
| 826. |
Which of the following is not true about incineration? |
| A. | it consumes all combustible materials |
| B. | it is not a clean process |
| C. | it does not produce air pollution |
| D. | it generates odor |
| Answer» D. it generates odor | |
| 827. |
Conditions are most variable in |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» B. stratosphere | |
| 828. |
Which layer of atmosphere is first exposed to sunlight? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» E. | |
| 829. |
What is the source of chlorofluorocarbons? |
| A. | aerosol sprays foams |
| B. | exhaust fumes of motor vehicles |
| C. | incomplete burning of wood |
| D. | none of above |
| Answer» B. exhaust fumes of motor vehicles | |
| 830. |
What is the meaning of the term 'Strato'? |
| A. | layer |
| B. | top |
| C. | changing |
| D. | turning |
| Answer» B. top | |
| 831. |
What is the color of nitric oxide? |
| A. | colorless |
| B. | pink |
| C. | brown |
| D. | reddish brown |
| Answer» B. pink | |
| 832. |
Which of the following causes global warming but is not an air pollutant? |
| A. | carbon dioxide |
| B. | carbon monoxide |
| C. | sulphur dioxide |
| D. | oxides of nitrogen |
| Answer» B. carbon monoxide | |
| 833. |
Considering the methods for making salt, the reaction of acid and base gives |
| A. | salt and water |
| B. | salt and hydrogen |
| C. | salt, carbon dioxide and water |
| D. | salt and salt |
| Answer» B. salt and hydrogen | |
| 834. |
The self-ionization of water occurs to a very small extent because water is a/an |
| A. | strong electrolyte |
| B. | weak electrolyte |
| C. | amphoteric substance |
| D. | liquid |
| Answer» C. amphoteric substance | |
| 835. |
What is the experimentally determined concentration of H+ ions at 25 degrees Celsius? |
| A. | 1 x 10-2 |
| B. | 1 x 10-4 |
| C. | 1 x 10-7 |
| D. | 1 x 10-10 |
| Answer» D. 1 x 10-10 | |
| 836. |
What is the pH of the apple? |
| A. | 5.5 - 7.0 |
| B. | 6.5 - 7.0 |
| C. | 6.0 - 7.5 |
| D. | 6.5 - 7.5 |
| Answer» B. 6.5 - 7.0 | |
| 837. |
Which of the following is not true about Bronsted-Lowery theory? |
| A. | an acid is a proton donor |
| B. | a base is a proton acceptor |
| C. | all Arrhenius acids are also acids in the Bronsted-lowery theory |
| D. | all the bases included in Bronsted-lowery theory except oh- are also Arrhenius bases |
| Answer» E. | |