MCQOPTIONS
Saved Bookmarks
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.
| 201. |
Vitamin B is necessary for |
| A. | eyes and skin |
| B. | energy production in cells |
| C. | healing wounds and preventing colds |
| D. | bones and teeth |
| Answer» C. healing wounds and preventing colds | |
| 202. |
The condensed structural formula of Caproic acid is |
| A. | CH3-CH2-CH2-COOH |
| B. | CH3-(CH2)4-COOH |
| C. | CH3-(CH2)14-COOH |
| D. | CH3-(CH2)16-COOH |
| Answer» C. CH3-(CH2)14-COOH | |
| 203. |
How many amino acids are synthesized by our bodies? |
| A. | 10 |
| B. | 20 |
| C. | 30 |
| D. | 40 |
| Answer» B. 20 | |
| 204. |
Plants convert glucose (C6H12O6) in to |
| A. | starch only |
| B. | cellulose only |
| C. | sucrose |
| D. | starch and cellulose |
| Answer» E. | |
| 205. |
Vitamin A is soluble in |
| A. | fat |
| B. | water |
| C. | lipids |
| D. | ethers |
| Answer» B. water | |
| 206. |
Enzymes are protein in nature and are used as |
| A. | biological catalyst |
| B. | chemical catalyst |
| C. | reaction inhibitor |
| D. | reaction stopper |
| Answer» B. chemical catalyst | |
| 207. |
Vitamin D is necessary for |
| A. | eyes and skin |
| B. | energy production in cells |
| C. | healing wounds and preventing colds |
| D. | bones and teeth |
| Answer» E. | |
| 208. |
A class of nitrogen-containing compounds in the nuclei of cells is called |
| A. | deoxyribonucleic acid |
| B. | ribonucleic acid |
| C. | nucleic acid |
| D. | none of above |
| Answer» D. none of above | |
| 209. |
Scurvy is caused by the deficiency of |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» D. vitamin D | |
| 210. |
DNA is found in |
| A. | cytoplasm |
| B. | vacuole |
| C. | cell nucleus |
| D. | none of above |
| Answer» D. none of above | |
| 211. |
Sugars which rotate the plane of polarized light in a clockwise direction are called |
| A. | lactose sugars |
| B. | complex sugars |
| C. | dextrose sugars |
| D. | simple sugars |
| Answer» D. simple sugars | |
| 212. |
Deficiency of vitamin C causes |
| A. | night blindness |
| B. | anemia and bleeding gums |
| C. | scurvy |
| D. | rickets and Osteomalacia |
| Answer» D. rickets and Osteomalacia | |
| 213. |
The building blocks of all proteins are |
| A. | hydroxyl group |
| B. | carbonyl group |
| C. | amino acids |
| D. | simple sugars |
| Answer» D. simple sugars | |
| 214. |
Deficiency of vitamin E causes |
| A. | sterility |
| B. | hemorrhage |
| C. | scurvy |
| D. | rickets and Osteomalacia |
| Answer» B. hemorrhage | |
| 215. |
Which of the following is not true about monosaccharides? |
| A. | they are white crystalline solids |
| B. | they are soluble in water |
| C. | they have sweet taste |
| D. | they can be hydrolyzed |
| Answer» E. | |
| 216. |
Vitamin E is soluble in |
| A. | fat |
| B. | water |
| C. | ethers |
| D. | phenols |
| Answer» B. water | |
| 217. |
Which of the following helps the muscles of our intestine to move food efficiently through the digestive track? |
| A. | vitamins |
| B. | fiber |
| C. | proteins |
| D. | lipids |
| Answer» C. proteins | |
| 218. |
Vitamin D is soluble in |
| A. | fat |
| B. | water |
| C. | ethers |
| D. | phenols |
| Answer» B. water | |
| 219. |
Kinds of nucleic acids are |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» C. three | |
| 220. |
The condensed structural formula of Butyric acid is |
| A. | CH3-CH2-CH2-COOH |
| B. | CH3-(CH2)4-COOH |
| C. | CH3-(CH2)14-COOH |
| D. | CH3-(CH2)16-COOH |
| Answer» B. CH3-(CH2)4-COOH | |
| 221. |
The vitamin which helps in ant oxidation is |
| A. | vitamin E |
| B. | vitamin K |
| C. | vitamin A |
| D. | vitamin D |
| Answer» B. vitamin K | |
| 222. |
The general formula of carbohydrates is |
| A. | CnH2n+2 |
| B. | CnH2n |
| C. | CnH2n-2 |
| D. | Cx(H2O)y |
| Answer» E. | |
| 223. |
Which of the following is true about monosaccharides? |
| A. | they cannot be hydrolyzed |
| B. | they can be hydrolyzed |
| C. | they have sour taste |
| D. | they are insoluble in water |
| Answer» B. they can be hydrolyzed | |
| 224. |
Which of the following causes pain in bones when taken in excess amount? |
| A. | vitamin A |
| B. | vitamin B |
| C. | vitamin C |
| D. | vitamin D |
| Answer» E. | |
| 225. |
If a lipid is solid at room temperature, it is called |
| A. | fat |
| B. | oil |
| C. | ethers |
| D. | phenol |
| Answer» B. oil | |
| 226. |
Vitamin D activates enzymes |
| A. | less than 100 |
| B. | more than 100 |
| C. | 50 |
| D. | 25 |
| Answer» C. 50 | |
| 227. |
The general formula for monosaccharides is |
| A. | CH2O |
| B. | (CH2O)n |
| C. | CHn |
| D. | CnHn |
| Answer» C. CHn | |
| 228. |
Glyceryl esters or glycerides is another term for |
| A. | fats only |
| B. | oils only |
| C. | lipids |
| D. | fats and oils |
| Answer» E. | |
| 229. |
Considering the structure of DNA, the strands are held together by |
| A. | oxygen bonds |
| B. | carbon bonds |
| C. | hydrogen bonds |
| D. | none of above |
| Answer» D. none of above | |
| 230. |
Casimir Funk thought that all the missing factors contained |
| A. | amino acids |
| B. | carboxylic acids |
| C. | amino group |
| D. | none of above |
| Answer» D. none of above | |
| 231. |
Which type of Hepatitis spreads through polluted water? |
| A. | hepatitis A only |
| B. | hepatitis B only |
| C. | hepatitis C |
| D. | hepatitis A and B |
| Answer» E. | |
| 232. |
What is the percentage of groundwater? |
| A. | 0 |
| B. | 0.002 |
| C. | 0.006 |
| D. | 0.021 |
| Answer» D. 0.021 | |
| 233. |
The hardness that can be removed by boiling is called |
| A. | temporary hardness |
| B. | permanent hardness |
| C. | semi temporary hardness |
| D. | semi permanent hardness |
| Answer» B. permanent hardness | |
| 234. |
Which of the following is an intestinal disease caused by bacteria such as E.coli? |
| A. | cholera |
| B. | dysentery |
| C. | jaundice |
| D. | hepatitis |
| Answer» B. dysentery | |
| 235. |
Temporary hardness of water is caused due to the presence of dissolved |
| A. | calcium hydrogen carbonates only |
| B. | magnesium hydrogen carbonates only |
| C. | Sulphates and chlorides of calcium or magnesium |
| D. | calcium hydrogen carbonates and magnesium hydrogen carbonates |
| Answer» E. | |
| 236. |
What type of reaction do alkynes undergo across the triple bond? |
| A. | elimination reaction |
| B. | substitution reaction |
| C. | addition reaction |
| D. | halogenation |
| Answer» D. halogenation | |
| 237. |
What is the color of the flame with which most alkanes burn? |
| A. | orange |
| B. | yellow |
| C. | red |
| D. | blue |
| Answer» E. | |
| 238. |
Which of the following is not true about lighter alkanes? |
| A. | their combustion can be controlled |
| B. | they produce large amount of heat per gram |
| C. | they are expensive and rare |
| D. | they are widely used as fuel |
| Answer» D. they are widely used as fuel | |
| 239. |
How does iodine react? |
| A. | explosively |
| B. | slowly in dark but rapidly in strong sunlight |
| C. | requires high temperature or strong sun light |
| D. | essentially unreactive |
| Answer» E. | |
| 240. |
Which of the following are saturated hydrocarbons? |
| A. | alkanes |
| B. | alkenes |
| C. | alkynes |
| D. | alkyl radicals |
| Answer» B. alkenes | |
| 241. |
Bases leave blue litmus |
| A. | red |
| B. | pint |
| C. | black |
| D. | unchanged |
| Answer» E. | |
| 242. |
The salt among the following is |
| A. | HCl |
| B. | KCl |
| C. | HNO3 |
| D. | H34 |
| Answer» C. HNO3 | |
| 243. |
Acids ionize in water to produce |
| A. | OH- ions |
| B. | H+ ions |
| C. | SO4-2 ions |
| D. | H2O molecules |
| Answer» C. SO4-2 ions | |
| 244. |
Which of the following is used in oxy-acetylene torches for welding and cutting metals? |
| A. | Ethyne |
| B. | ethene |
| C. | ethane |
| D. | methane |
| Answer» B. ethene | |
| 245. |
Which of the following is not true about alkenes? |
| A. | they are unsaturated hydrocarbons |
| B. | they are insoluble in water |
| C. | they are soluble in organic solvents such as alcohol |
| D. | they are soluble in water |
| Answer» E. | |
| 246. |
First three members of alkynes are |
| A. | solids |
| B. | liquids |
| C. | gases |
| D. | plasma |
| Answer» D. plasma | |
| 247. |
What is the physical state of alkanes containing five to seventeen carbon atoms? |
| A. | solid |
| B. | liquid |
| C. | gas |
| D. | plasma |
| Answer» C. gas | |
| 248. |
In alkenes, the two carbon atoms forming double bond are joined to how many atoms? |
| A. | one |
| B. | two |
| C. | three |
| D. | four |
| Answer» D. four | |
| 249. |
A water-soluble vitamin Dissolves In |
| A. | fat |
| B. | water |
| C. | alcohol |
| D. | ether |
| Answer» C. alcohol | |
| 250. |
Amino acids that can be synthesized by our bodies are called |
| A. | essential amino acids |
| B. | non-essential amino acids |
| C. | peptide bonds |
| D. | proteins |
| Answer» C. peptide bonds | |