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.
| 651. |
What is formed when maltose undergoes hydrolysis? |
| A. | glucose |
| B. | glucose and fructose |
| C. | glucose and galactose |
| D. | glucose and glucose |
| Answer» E. | |
| 652. |
Structure of DNA was discovered by |
| A. | J.Watson only |
| B. | Francis Crick only |
| C. | F.G Hopkins |
| D. | J.Watson and Francis Crick |
| Answer» E. | |
| 653. |
A component of plant or animal tissue insoluble in water is called |
| A. | protein |
| B. | carbohydrate |
| C. | vitamin |
| D. | lipids |
| Answer» E. | |
| 654. |
Complex nitrogenous substances that produce amino acids on complete hydrolysis are called |
| A. | proteins |
| B. | vitamins |
| C. | lipids |
| D. | carbohydrates |
| Answer» B. vitamins | |
| 655. |
Long-chain carboxylic acids are named as |
| A. | lipids |
| B. | fatty acids |
| C. | phospholipids |
| D. | cholesterol |
| Answer» C. phospholipids | |
| 656. |
What is formed when sucrose undergoes hydrolysis? |
| A. | glucose |
| B. | glucose and fructose |
| C. | glucose and galactose |
| D. | glucose and glucose |
| Answer» C. glucose and galactose | |
| 657. |
The layer of fat under mammalian skin acts as an |
| A. | electric insulator |
| B. | thermal insulator |
| C. | protection from germs |
| D. | protection from viruses |
| Answer» C. protection from germs | |
| 658. |
Deficiency of vitamin K causes |
| A. | sterility |
| B. | hemorrhage |
| C. | scurvy |
| D. | rickets and Osteomalacia |
| Answer» C. scurvy | |
| 659. |
On hydrolysis, all proteins produce |
| A. | amines |
| B. | peptide bonds |
| C. | amino acids |
| D. | dipeptide |
| Answer» D. dipeptide | |
| 660. |
Which of the following is present in cereals, wheat, barley, rice, maize, potato, sweet potato, etc.? |
| A. | sucrose |
| B. | glucose |
| C. | fructose |
| D. | starch |
| Answer» E. | |
| 661. |
Which of the following is used in bread making? |
| A. | protease |
| B. | amylase |
| C. | diastase |
| D. | lactase |
| Answer» C. diastase | |
| 662. |
Sucrose, lactose, and maltose are |
| A. | monosaccharides |
| B. | oligosaccharides |
| C. | polysaccharides |
| D. | vitamins |
| Answer» C. polysaccharides | |
| 663. |
Existence of RNA is in the form of |
| A. | single strand |
| B. | double strand |
| C. | triple strand |
| D. | four strands |
| Answer» B. double strand | |
| 664. |
Two fatty acids that are components of fats are |
| A. | stearic acid and oleic acid |
| B. | butyric acid and caproic acid |
| C. | palmitic acid and oleic acid |
| D. | none of above |
| Answer» C. palmitic acid and oleic acid | |
| 665. |
Which of the following is caused due to an extreme lack of proteins? |
| A. | malaria |
| B. | typhoid |
| C. | kwashiorkor |
| D. | anemia |
| Answer» D. anemia | |
| 666. |
Anemia, bleeding gums and tongue inflammation is caused by the deficiency of |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» C. vitamin C | |
| 667. |
Raffinose is an example of |
| A. | monosaccharides |
| B. | disaccharides |
| C. | polysaccharides |
| D. | Trisaccharides |
| Answer» E. | |
| 668. |
Source of caproic acid is |
| A. | butter |
| B. | palm oil |
| C. | beef fat |
| D. | olive oil |
| Answer» B. palm oil | |
| 669. |
Which of the following is necessary for proper bone and tooth growth? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» E. | |
| 670. |
Considering the structure of DNA, each strand is made up of |
| A. | deoxyribose sugar |
| B. | phosphate unit |
| C. | nitrogen base |
| D. | all of above |
| Answer» E. | |
| 671. |
When hydrogen is added to an alkene, the process is called |
| A. | dehydration |
| B. | Dehydrohalogenation |
| C. | hydrogenation |
| D. | hydrochlorination |
| Answer» D. hydrochlorination | |
| 672. |
Which of the following are glucose and fructose? |
| A. | monosaccharides |
| B. | oligosaccharides |
| C. | polysaccharides |
| D. | starch |
| Answer» B. oligosaccharides | |
| 673. |
Approximately, what percentage of water vapor is contained by the air in the tropical rain forest? |
| A. | 0.01 |
| B. | 0.02 |
| C. | 0.03 |
| D. | 0.04 |
| Answer» E. | |
| 674. |
The pH of normal rainwater is |
| A. | 4 |
| B. | 5 |
| C. | 5.6 |
| D. | 6.6 |
| Answer» D. 6.6 | |
| 675. |
Which of the following is the fourth layer of atmosphere as one moves upwards from the Earth's surface? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» E. | |
| 676. |
Which of the following is the Third layer of atmosphere as one moves upwards from the Earth's surface? |
| A. | troposphere |
| B. | stratosphere |
| C. | mesosphere |
| D. | thermosphere |
| Answer» D. thermosphere | |
| 677. |
Which of the following is an excellent heat absorber and causes global warming? |
| A. | chlorofluorocarbons (CFCs) |
| B. | methane |
| C. | carbon monoxide |
| D. | lead compounds |
| Answer» C. carbon monoxide | |
| 678. |
What is the term used for a state of a chemical reaction in which forward and reverse reactions take place at the same rate? |
| A. | chemical equilibrium |
| B. | stable reaction |
| C. | reversible reaction |
| D. | forward reaction |
| Answer» B. stable reaction | |
| 679. |
A reversible reaction |
| A. | always completes |
| B. | never goes to completion |
| C. | spontaneous reactions |
| D. | non spontaneous reactions |
| Answer» C. spontaneous reactions | |
| 680. |
The conditions for equilibrium of concentration of reactant and products will be the same if |
| A. | temperature is constant |
| B. | pressure or volume is constant |
| C. | concentration of products and reactants are same |
| D. | all of above |
| Answer» E. | |
| 681. |
If the concentration, temperature, and pressure is changed, the system responds in a way that |
| A. | follows the change |
| B. | opposes the change |
| C. | does not change at all |
| D. | encourages the change |
| Answer» C. does not change at all | |
| 682. |
A substance which increases the rate of reaction is called |
| A. | catalyst |
| B. | reactant |
| C. | product |
| D. | coordinator |
| Answer» B. reactant | |
| 683. |
Dry skin is caused by the deficiency of |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin B | |
| 684. |
Sucrose, lactose, and maltose are classified as |
| A. | monosaccharides |
| B. | disaccharides |
| C. | polysaccharides |
| D. | Trisaccharides |
| Answer» C. polysaccharides | |
| 685. |
Which of the following is a pentahydroxy aldehyde? |
| A. | glucose |
| B. | fructose |
| C. | glycogen |
| D. | starch |
| Answer» B. fructose | |
| 686. |
Which of the following is added to margarine to prevent night blindness? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» B. vitamin B | |
| 687. |
In the human diet, cellulose is referred to as |
| A. | vitamin |
| B. | fiber |
| C. | lipid |
| D. | protein |
| Answer» C. lipid | |
| 688. |
The water molecule that donates a proton becomes a |
| A. | negatively charged hydroxide ion |
| B. | negatively charged oxygen ion |
| C. | negatively charged hydrogen ion |
| D. | positively charged hydronium ion |
| Answer» B. negatively charged oxygen ion | |
| 689. |
What is the pH of the soapy solution? |
| A. | 8 |
| B. | 9 |
| C. | 10 |
| D. | 12 |
| Answer» E. | |
| 690. |
Considering the methods for making salt, the reaction of acid and metal gives |
| A. | salt and water |
| B. | salt and hydrogen |
| C. | salt, carbon dioxide and water |
| D. | salt and salt |
| Answer» C. salt, carbon dioxide and water | |
| 691. |
What is the pH of distilled water? |
| A. | 5 |
| B. | 6 |
| C. | 7 |
| D. | 8 |
| Answer» D. 8 | |
| 692. |
Which of the following is used in liquid soap and shaving cream? |
| A. | sodium hydroxide |
| B. | potassium hydroxide |
| C. | calcium hydroxide |
| D. | magnesium hydroxide |
| Answer» C. calcium hydroxide | |
| 693. |
What is the state of methyl chloride at room temperature? |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» D. plasma | |
| 694. |
Ethene, propene, and butene are |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | plasma |
| Answer» D. plasma | |
| 695. |
Acetylene is another name of |
| A. | ethene |
| B. | propene |
| C. | butene |
| D. | pentene |
| Answer» B. propene | |
| 696. |
What causes the red color of tomatoes? |
| A. | lycopene |
| B. | ethene |
| C. | ethylene glycol |
| D. | acetylene |
| Answer» B. ethene | |
| 697. |
The odor of Ethyne is |
| A. | onion like |
| B. | garlic like |
| C. | vinegar like |
| D. | fruity |
| Answer» C. vinegar like | |
| 698. |
The thermosphere is hot up to |
| A. | 1800 °C |
| B. | 800 °C |
| C. | 1000 °C |
| D. | 50 °C |
| Answer» B. 800 °C | |
| 699. |
What is the source of sulfur dioxide? |
| A. | Powerstations and industries using fossil fuels |
| B. | exhaust fumes of motor vehicles |
| C. | incomplete burning of wood |
| D. | none of above |
| Answer» B. exhaust fumes of motor vehicles | |
| 700. |
Which of the following is a poisonous gas? |
| A. | carbon dioxide |
| B. | carbon monoxide |
| C. | nitrogen |
| D. | nitrogen dioxide |
| Answer» C. nitrogen | |