biology MCQs – Page 12

Practise multiple-choice questions from biology for competitive examinations and subject revision. Review each marked answer and report any item that may be outdated or unclear.

biology Mcqs
221. Sickle cell anemia is an example of_________________?
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A. Deletion of gene

B. Insertion of gene

C. Chromosomal aberration

D. Point mutation
222. ____________% of Glucose normally present in our blood is?
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A. 1.80%

B. 0.08%

C. 8%

D. 0.80%

223. Hemoglobin molecule exhibits which structural organization of proteins___________?
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A. Quaternary structure

B. Secondary structure

C. Primary structure

D. Tertiary structure

224. Which chemical component has the same % in bacterial as well as the mammalian cell_____________?
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A. Lipids

B. Carbohydrate

C. Proteins

D. Water
225. Number of cervical vertebrae is_____________?
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A. 7

B. 12

C. 9

D. 5

226. Which one is soluble in hot water_____________?
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A. Amylopectin.

B. Glycogen

C. Starch

D. Amylose
227. Movement of the material across the cell membrane which does not requiring expenditure of metabolic energy is called__________?
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A. Active transport

B. Co-transport

C. Counter transport

D. Passive transport
228. Which one gives blue colour with iodine_______________?
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A. Glycogen

B. Polysaccharide

C. Cellulose

D. Starch
229. Following possess bilateral symmetry as larva and radial symmetry as adult:
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A. Chordata

B. Hydra

C. Hemichordata

D. Echinodermata
230. One celled green ptotists are included in___________?
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A. Monera

B. Slime molds

C. Algae

D. Plants

231. Which of the following statement is incorrect5 for fats containing unsaturated fatty acid_____________?
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A. They are lighter than water

B. They are usually solid at room temperature

C. Their specific gravity is less than 1

D. They contain double bond

232. Which one of the following syndrome is the result of meiotic non dysjunction?
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A. Turners syndrome

B. Klinefelters syndrome

C. All of these

D. Downs syndrome

233. Primary structure of proteins determines__________?
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A. Bending of polypeptide chains

B. Amino acid sequence

C. Coiling of polypeptide chains

D. Number of polypeptide chains involved

234. The property of water due to which it works as a temperature stabilizer and hence protect living organisms from sudden thermal changes is_______________?
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A. Its Dipole nature

B. High specific heat of vaporization

C. Its liquid state

D. High specific heat capacity
235. The basic structural unit of a chromosome is____________?
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A. The centromere

B. Histone

C. Nuceleosome

D. Telomere

236. Which of the following carbohydrate is tasteless___________?
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A. Monosaccharide

B. None of these

C. Polysaccharide

D. Oligosaccharide

237. The one which can break open a plasmid ring is__________?
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A. Ligase enzyme

B. ATP-ase enzyme

C. Restriction endonuclease

D. Primase enzyme

238. Yellow cytoplasm in ascidian gives rise to______________?
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A. Muscle cells

B. Epidermis

C. Gut

D. Notochord

239. Optimal temperature of enzymes present in human body is_____________?
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A. 47?C

B. 30?C

C. 27?C

D. 37?C
240. Keto group is represented as___________?
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A. CO

B. HOH

C. C-COO-C

D. HCOH