MCQ BIOLOGY ( BIOMOLECULES- III)
201 Amino acids can react with:
(a) Benedict’s solution
(b) Sanger’s reagent
(c) Fehling’s reagent
(d) Barfoed’s reagent
202. Chargaff found that for DNA
(a) the ratio of A to C is close to 1:1 and the ratio of G to T is close to 1:1
(b) the ratio of A to T is close to 1:1 and the ratio of G to C is close to 1:1
(c) the ratio of A to G is close to 1:1 and the ratio of T to C is close to 1:1
(d) A + T = G + C
203. Choose the non essential amino acid for man:
(a) tyrosine
(b) leucine
(c) lysine
(d) valine
204. Brown fat is used for generating energy:
(a) during exercise
(b) during hibernation
(c) soon after hibernation
(d) during gestation period
205. The removal of carboxyl group from histidine makes it:
(a) haem
(b) adrenalin
(c) histamine
(d) glycine
206. Calmodulin is:
(a) amino acid
(b) hormone
(c) protein
(d) lipid
207. The amino acid with imino group (=NH) instead of group (—NH2) is:
(a) proline
(b) isoleucine
(c) tryptophan
(d) serine
208. F. Sanger determined the primary structure of:
(a) globin
(b) lysozyme
(c) insulin
(d) glucagon
209. Hyaluronic acid is present in:
(a) amniotic fluid
(b) plasma
(c) viterous humour of eye
(d) cerebrospinal fluid
210. Proteins in silk fibre are:
(a) chondrin and mucin
(b) fibrin and sericine
(c) fibrin and serine
(d) collagen and elastin
211. If a protein molecule has 65 lysine and 25 glutamate residues. ft wifi be:
(a) acidic protein
(b) basic protein
(c) neutral protein
(d) insoluble protein
212. Linus Pauling explained the structure of:
(a) a-helix
(b) b-pleated sheet
(c) 3-D form
(d) DNA
213. Cell membrane is mainly formed of lipids, proteins and carbohydrates. With respect to their mutual proportions. Choose the correct statement:
(a) all the three are in equal proportions
(b) lipids are in least proportion
(c) carbohydrates are in least proportion
(d) proteins are in least proportion
214. The most characteristic difference between prokaryotic and eukaryotic cells is that prokaryotic cells:
(a) both lack nuclei and DNA
(b) lack ribosomes
(c) have dispersed DNA without a bounding nuclear membrane
(d) different biochemistry from eukaryotes
215. The substance which make up 80% of cytoplasm in plant cells is:
(a) fats
(b) minerals
(c) water
(d) proteins
216. The sulphur containing amino acid is:
(a) valine
(b) leucine
(c) methionine
(d) histidine
217. The enormous diversity of protein molecules is due to the diversity of (mostly):
(a) R group of amino acid
(b) amino group on amino acid
(c) peptide bonds
(d) amino acid sequences within protein molecules
218. The storage protein among the following is:
(a) keratin
(b) glutelin
(c) myoglobin
(d) collagen
219. The term protein was coined by:
(a) Henry
(b) Sanger
(c) Berzelius
(d) Dujardin
220. An antifertility steroid is:
(a) cortisol
(b) progesterol
(c) diosgenin
(d) estrogen
221. Phospholipids form:
(a) single layer on water surface
(b) a bilayer
(c) no specific arrangements
(d) an insoluble layer on water surface
222. Starch is detected in food by its:
(a) white appearance
(b) blue reaction with ‘2
(c) presence as an energy store
(d) granular form even if cooked
223. The quality of water because of which it is needed by body:
(a) it is a liquid
(b) it is made up of H2 and 02 and this 02 can be used in cellular metabolism
(c) it is tasteless, colourless and odourless
(d) it is a universal solvent
224. Oil of Eucalyptus contains:
(a) ergosterol
(b) terpenes
(c) polyunsaturated fatty acids
(d) hyaluronic acid
225. Doctors recommend sunflower oil as it is:
(a) rich source of vitamins
(b) rich in unsaturated fatty acid
(c) rich in energy and reduce weight
(d) rich in saturated fatty acid
226. Which of the following categories of macromolecules include representatives that frequently serve as energy storage molecules?
(a) Proteins
(b) Lipids
(c) Carbohydrates
(d) Both ‘a’ and ‘b’
227. Chromoprotein among the following is:
(a) endorphin
(b) rhodopsin
(c) FSH
(d) phosphoprotein
228. Prostaglandins synthesised in our body from:
(a) oleic acid
(b) arachidic acid
(c) steanc acid
(d) arachidonic acid
229. Presence of prosthetic group makes a protein:
(a) acidic
(b) brittle
(c) simple
(d) conjugated
230. The glucuronic and galacturonic acids are main components of:
(a) lignin
(b) pectin
(c) suberin
(d) glucose
231. Iodine gives colour:
(a) purple with amylase
(b) bluish black with amylopectin
(c) bluish black with amylose purple with amylopectin
(d) red with amylose and blue with amylopectin
232. Aromatic amino acids are:
(a) insoluble in water
(b) highly soluble
(c) less soluble in water than amino acids
(d) as soluble in water as other other amino acids
233. The test that distinguish between monosaccharides and disaccharides is:
(a) Benedict’s test
(b) Barfoed’s test
(c) Tollen’s test
(d) Nylander’s test
234. Conjugated proteins containing carbohydrates as prosthetic group are known as:
(a) lipoproteins
(b) nucleoproteins
(c) glycoproteins
(d) chromoproteins
235. Steroids are important constituent of:
(a) cell membrane
(b) sex hormones
(c) enzymes
(d) all of the above
236. Which one of the following does not form biopolymers?
(a) Lipids
(b) Amino adds
(c) Nucleotides
(d) Monosaccharides
237. Which of the following amino acids is essential for metabolism?
(a) Serine
(b) Creatinine
(c) Phenylalanine
(d) Aspartic acid
238. The primary structure of protein is made up of:
(a) Hydrogen bonds
(b) Ionic bonds
(c) Peptide bonds
(d) None of these
239. A peptide bond formation between two amino acids is accompained by the:
(a) loss of water
(b) deaminadon
(c) addition of water
(d) decarboxylation
240. Which one of the following glycosidic linkage is found is maltose?
(a) b - 1, 4
(b) a - 4, 1
(c) b - 4, 1
(d) a - l, 4
241. Maltose, Lactose and Sucrose are:
(a) disaccharides
(b) polysactharides
(c) trisaccharides
(d) monosaccharides
242. Which of the following amino acids can stabilize protein structure by forming disuiphide bonds?
(a) Alanine
(b) Lysine
(c) Cysteine
(d) Arginine
243. Lipids are not soluble in water because:
(a) lipids are neutral
(b) lipids are hydrophillic
(c) lipids are hydrophilic
(d) zwitter ion complex of lipids
244. If all the peptide bonds of a protein are borken down, then what would remain?
(a) Amino acids
(b) Peptides
(c) Polypeptides
(d) Oligopeptides
245. Which of the following is a reducing sugar?
(a) Glucinol
(b) Galactose
(c) b galactosidase
(d) None of these
246. Which one of the following will be different in different animals?
(a) Carbohydrates
(b) Lipids
(c) Proteins
(d) Vitamins
247. The differences among amino acid are found in their:
(a) amino group
(b) R-group
(c) peptide bond
(d) carboxyl group
248. Which of the following is conjugated protein?
(a) Keratin
(b) Albumin
(c) Collagen
(d) Haemoglobin
249. In some fruits like ‘Bhindi’ the mucilage is made up of:
(a) galactose
(b) mannose
(c) both ‘a’ and ‘b’
(d) lactose
250. Glucose is not a component of which of the following?
(a) Cellulose
(b) Maltose
(c) Starch
(d) Inulin
251. Number of fatty acids in a neutral fat:
(a) 1
(b) 2
(c) 3
(d) 4
252. The molecule given below is:
(a) Glucose
(b) Fructose
(c) Sucrose
(d) Galactose
253. Which of the amino acid is not hydrophilic?
(a) Histidine
(b) Phenylalanine
(c) Glycine
(d) Lysine
254. Which of the following is a tetrose sugar?
(a) Ribose
(b) Talose
(c) Mannose
(d) Erythrose
255. Scleroproteins are:
(a) Keratin
(b) Collagen
(c) ‘a’ and ‘b’ both
(d) Glycoprotein
256. During protein denaturation one of the following is disrupted
(a) secondary and tertiary structures
(b) three dimensional shape
(c) peptide bond sequence of amino acids
(d) both ‘a’ and ‘b’
257. Aldohexoses and ketohexoses when heated with strong mineral acids the compound produced is:
(a) Osazones
(b) Oximes
(c) Hydroxymethylfurfuxyl
(d) Dicarboxyl compounds
258. Choose the incorrect match among the following:
(a) Citrullin — Kreb’s Heinslet cycle
(b) GABA — CNS
(c) Histamine —Vasodialator
(d) b - alanine — Ascorbic acid
259. Fibroin is the protein of:
(a) wheat
(b) rice
(c) barley
(d) silk
260. The filaments in the cilia of protozoans are made up of a protein called
(a) actin
(b) myosin
(c) ossein
(d) tubulin
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