Chemistry Class 10th

241. Proteins are polymers of:

A) Carbohydrates

B) Amino acids

C) Fatty Acid

D) Minerals

242. Proteins are complex _________ substances.

A) Halide

B) Sulphuric

C) Nitrogenous

D) None of the above

243. About 50-55% of the dry weight of cells is:

A) Carbohydrates

B) Proteins

C) Lipids

D) Minerals

244. Proteins also contain traces of:

A) Nickel

B) Sulpher

C) Ammonia

D) None of the above

245. Proteins are joined together by:

A)Glyceric Linkage

B) Peptide Links

C) Ionic bonding

D) Covalent Bonding

246. Proteins contain:

A) NH2


C) Both A and B

D) None of the above

247. There are ______ different types of amino acid groups:

A) 10

B) 13

C) 20

D) 24

248. There are ______ essential amino acids.

A) 10

B) 13

C) 20

D) 24

249. Additional _______ reactions lengthen the chain and produce polypeptide chain.

A) Sublimation

B) Condensation

C) Reduction

D) Addition

250. Which of the following type of bonding occurs in protein molecules:

A) Peptide Bonding

B) Hydrogen Bonding

C) Disulphide Bonding

D) All of the above

251. Each amino acid has a side chain designated by:

A) A

B) F

C) R

D) H

252. Disulphide bridges are only in sulpher containing protein molecules

A) True

B) False

253. Which of the following is not the use of Protein:

A) Oxygen Carrier

B) Body Structure helper

C) Primary Energy Source

D) Body defense system

254. Lipose means:

A) Grease

B) Fatty

C) Long Complex Chains

D) None of the above

255. Lipids are not soluble in water:

A) True

B) False

256. Lipid can not be dissolved in which of the following:

A) Benzene

B) Chloroform

C) Water

D) Ether

257. Steroids are a type of:

A) Lipid

B) Protein

C) Carbohydrate

D) Mineral

258. Lipids are classified into _____ types:

A) 2

B) 3

C) 4

D) None

259. Simple lipids are also known as:

A) Phospholipids

B) Triglycerides

C) Glycolipids

D) Sulpholipids

260. Oils and Fats are simple lipids:

A) True

B) False