201. Proteins covalently attached to carbohydrates are:
Answer: B. glycoproteins
Biology Class 11 Unit 2: Molecular Biology (Biological Molecules) MCQs
235 multiple choice questions with the correct answer for each. Tap an option to check yourself, or switch on "Show all answers". This is page 5 of 5.
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202. Blood group antigens contain:
Answer: B. glycoproteins
203. Nucleoproteins are found in:
Answer: B. chromosomes and ribosomes
204. Lipoproteins are found in:
Answer: B. milk, blood, egg yolk membrane and chloroplasts
205. Fatty acids vary in length; the simplest are acetic acid and:
Answer: B. butyric acid
206. The Sudan II test gives a:
Answer: B. dark red colour ring or layer
207. A translucent greasy spot on filter paper (spot test) indicates:
Answer: C. lipids
208. The blue-black colour with iodine confirms the presence of:
Answer: B. starch
209. The enzyme in saliva responsible for the sweet taste is:
Answer: C. amylase
210. The sweet disaccharide first produced from starch is:
Answer: C. maltose
211. The reaction by which starch is broken into maltose is:
Answer: B. hydrolysis
212. The pink-violet colour indicates the presence of:
Answer: B. protein
213. The test used for it is the:
Answer: C. Biuret test
214. The greasy translucent spot indicates:
Answer: B. lipid
215. The bond between amino acids in the protein that gave the pink-violet colour is:
Answer: C. peptide
216. The cause of this disease is a change in the:
Answer: B. sequence of amino acids of the beta chain of haemoglobin
217. The change is caused by:
Answer: B. a point mutation in the beta-globin gene
218. At position 6 of the beta chain:
Answer: B. glutamic acid is replaced by valine
219. This example proves the importance of:
Answer: B. the sequence of amino acids in primary structure
220. The percentage of thymine will be:
Answer: C. 30 percent
221. The percentage of guanine will be:
Answer: C. 20 percent
222. The total of purines is equal to the total of:
Answer: B. pyrimidines
223. Which rule explains these ratios?
Answer: B. Chargaff's rule
224. The tRNA has a triplet complementary to the codon, called the:
Answer: B. anticodon
225. The first step in making the protein, forming mRNA from a gene, is:
Answer: B. transcription
226. The sugar of the nucleotide in mRNA is:
Answer: C. ribose
227. The structure that carries amino acids to the ribosome is:
Answer: C. tRNA
228. The cooling effect of sweating is due to water's:
Answer: B. high heat of vapourization
229. Fish survive under the ice because ice:
Answer: B. is less dense, floats and acts as an insulating layer
230. Steady body temperature despite heat is because water has high:
Answer: B. specific heat capacity
231. The reason ice is less dense is its:
Answer: B. lattice structure with maximum hydrogen bonding
232. Solution P likely contains:
Answer: B. glucose
233. Solution Q likely contains:
Answer: C. sucrose
234. Solution R likely contains:
Answer: C. glycogen
235. Sucrose gives a positive result only after boiling with acid because:
Answer: B. it is a non-reducing sugar that must first be hydrolysed
About Biology Class 11 Unit 2 MCQs (Federal Board)
These 235 Biology MCQs cover Class 11 Unit 2: Molecular Biology (Biological Molecules) of the Federal Board (FBISE) HSSC-I (1st Year / Class 11) syllabus. They are SLO-based MCQs as per the new pattern for FBISE exams. Each question has four options and the correct answer is shown, so you can practise for the annual examination and find the topics you still need to revise. The questions are split over 5 pages of 50. Use the Print button to save this chapter as a PDF.