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This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 201. |
A completely radioactive double standed DNA molecule undergoes two round of raplication in a non radioactive medium. What will be the radioactive status of the foour daughter molecues :-A. All four, stilll contain radioactivityB. Redioactivity is lost from all fourC. Out of four, three contains radioactivityD. Half of the number contain no radioacitivity |
| Answer» Correct Answer - D | |
| 202. |
Genetic code was diciphered by chemically synthesizing the trinucleotides by-A. Watson & CrickB. Beadle & TatumC. Biggs & kingD. M.W. Nirenberg |
| Answer» Correct Answer - D | |
| 203. |
In maize coloured endosperm (C ) is dominant over colourless (c ) and full endosperm (R ) is dominant over shrunken (r ). When a dihybrid of `F_(1)` generation was test crossed it produced four phenotypes in the following percentage `{:("Coloured and Full",=50%),("Colourless - Full",=5%),("Colourless - Full",=4%),("Colourless - shrunken",=46%):}` From these data what would be distance between the two non allelic genes :-A. 48 unitB. 9 unitC. 4 unitD. 12 unit |
| Answer» Correct Answer - B | |
| 204. |
What is it that forms the basis of DNA FingerprintingA. The relative amount of DNA in the ridges and grooves of the fingerprints.B. Setellite DNA occuring as highly repeated short DNA segmentsC. The relative proportions of purines and pyrimidines in DNAD. The relative difference in the DNA occurrence in blood, sink and saliva |
| Answer» Correct Answer - B | |
| 205. |
method by which information reaches from DNA to RNA is :-A. TrascriptionB. TranslationC. TransformationD. Transduction |
| Answer» Correct Answer - A | |
| 206. |
The scientist who was awarded Nobel prize in 1959 for in vitro synthesis of ployribonucleotide :-A. MendelB. CalvinC. khoranaD. Ochoa |
| Answer» Correct Answer - D | |
| 207. |
Heterozygous tall plants were crossed with dwarf plants. What will be the ratio of dwarf plants in the progeny :-A. `50%`B. `25%`C. `75%`D. `100%` |
| Answer» Correct Answer - A | |
| 208. |
A pure tall plant can be differentiated from a hybrid tall plant :A. By measuring length of plantB. By spraying gibberalinsC. If all plants are tall after self-pollinationD. If all plants are dwarf after self-pollination |
| Answer» Correct Answer - C | |
| 209. |
Assertion :- Hydrogen bonds between hase pairs it is only mean to stabilise helical structure. Reason : Plane of one base pair stacks over other have no role in stability of DNA helics.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - D | |
| 210. |
Assertion :- DNA is perdominant genetic material. Reason : It is able to generate is replica.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - A | |
| 211. |
A nucleoside differs from a nucleotide is not having -A. PhosphateB. SugarC. Phosphate & sugarD. Nitrogen base |
| Answer» Correct Answer - A | |
| 212. |
In RNA, Nucleotides are bonded by-A. H- bondsB. Phospodiester bondsC. Ionic bondsD. Salt linkage |
| Answer» Correct Answer - B | |
| 213. |
Strongest evidence that DNA is genetic material comes from-A. Chromosomes contain cellsB. Transformation of bacterial cellsC. DNA is present in nucleusD. DNA is not present in cytoplasm |
| Answer» Correct Answer - B | |
| 214. |
Histone occupies the major grooves of DNA at an angle ofA. `60^(@)`B. `90^(@)`C. `45^(@)` to helix axisD. `30^(@)` to helix axis |
| Answer» Correct Answer - D | |
| 215. |
A roan bull is bread to three cows. Cow A has the same genotype as the roan bull. Cow B is red and cow C is white. What proportiions of roan cows are expected in the offsprings of each group of cows :-A. `2,1,1`B. `1,2,1`C. `1,1,2`D. `3,1` |
| Answer» Correct Answer - A | |
| 216. |
Law of independent assortment of Mendel was proved by :-A. Monohybrid crossB. Reciprocal crossC. Dihybrid crossD. Back cross |
| Answer» Correct Answer - C | |
| 217. |
An exception to the law of independent assorment is :-A. DominanceB. Incomplete dominanceC. SegregationD. Linkage |
| Answer» Correct Answer - D | |
| 218. |
A child of O blood group, hasB-blood group father, the genotype of father would be :-A. `I^(0)I^(0)`B. `I^(B)I^(B)`C. `I^(A)I^(B)`D. `I^(B)I^(0)` |
| Answer» Correct Answer - D | |
| 219. |
In mother has blood group AB, father has A group when Which of the following blood group will not found in the offspring.A. AB. BC. ABD. O |
| Answer» Correct Answer - D | |
| 220. |
A normal visioned man whose father was colour blind, marries a woman whose father was also colour blind .They have their first child as a daughter .What are the chances that this child would be colour blind ?A. `25%`B. `50%`C. `100%`D. Zero percent |
| Answer» Correct Answer - D | |
| 221. |
A child with mother of A group and father of AB group, will not have the following blood groupA. OB. AC. A and OD. O and B |
| Answer» Correct Answer - B | |
| 222. |
A nutritionally wild type organism ,which does not require any additional growth supplement is known as :A. HolotypeB. AuxotrophC. PrototrophD. Phenotype |
| Answer» Correct Answer - C | |
| 223. |
Which of the following is a false statements ?A. DNA is chemically less reactive, as compared to RNAB. RNA mutate at a faster rate, as compared to DNAC. Guanyl transferase enzyme helps in capping process during splicing of hn-RNAD. Sweetness index of saccharine is `10,000` |
| Answer» Correct Answer - D | |
| 224. |
Base ratio of a DNA is `0.03` and the amount of `A-TN_(2)` base contents is 30000, then what is the amount of `G-C,N_(2)` bae contents in this DNA?A. 1000B. 10000C. 100000D. None |
| Answer» Correct Answer - D | |
| 225. |
One of the characteristic of DNA is -A. UracilB. Deoxyribose sugarC. Single strandednessD. Ability of protein synthesis |
| Answer» Correct Answer - B | |
| 226. |
Which of the following is not a pyrimidine `N_(2)` base-A. ThymineB. CytosineC. GuanineD. Uracil |
| Answer» Correct Answer - C | |
| 227. |
The purne & pyrimidine pairs of complementry starands of DNA are held together by -A. H- bondsB. O- bondsC. C- bondsD. N- bonds |
| Answer» Correct Answer - A | |
| 228. |
DNA finger printing technique was first developed byA. Kary MullisB. Alce jefferyC. Dr. Paul BergD. Francis Collins |
| Answer» Correct Answer - B | |
| 229. |
Genes do not occur in pairs inA. ZygoteB. Somatic cellC. EmbryoD. Gametes |
| Answer» Correct Answer - D | |
| 230. |
Double helical model of DNA molecule was proposed by `:`A. Watson and CrickB. Schleiden schwannC. Singer and NicholsonD. Kornberg and khurana |
| Answer» Correct Answer - A | |
| 231. |
If there are `10,000` nitrogenous base pairs in a DNA then how many nucleotides are there-A. 500B. `10,000`C. `20,000`D. `40,000` |
| Answer» Correct Answer - C | |
| 232. |
Assertion :- Beside hiigh rate of polymerisation of nucleotides DNA polymerase have to catalyse the reaction with high degree of accuracy. Reason : Any mastake during replication wold results into mutations.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - A | |
| 233. |
Black bone is structure of DNA molecule is made up of -A. Pentose Suger and phosphateB. Hexose sugar and phosphateC. Purine and pyrimidineD. Sugar and phosphate |
| Answer» Correct Answer - A | |
| 234. |
Bond between phosphate and sugar in a nucleotide is :-A. H-bondB. Covelent bondC. Phosphodiester bondD. Sulphide bond |
| Answer» Correct Answer - B | |
| 235. |
Substance common in DNA and RNA-A. Hexose SugerB. HistamineC. ThymineD. Phosphate groups |
| Answer» Correct Answer - D | |
| 236. |
Nucleotide is -A. `N_(2)`- base, pentose sugar and phosphoric acidB. Nitrogen, Hexose suger and phosphoric acidC. Nitrogen base, pentose sugarD. Nitrogen base, trioses and phosphoric acid |
| Answer» Correct Answer - A | |
| 237. |
The term "linkege" was coined by :A. W. SuttonB. T.H. MorganC. T. BoveriD. G. Mendel |
| Answer» Correct Answer - B | |
| 238. |
The term informosome is applies to :-A. t-RNA protein complexB. m-RNA protein complexC. m-RNA + t- RNA complexD. t- RNA + t- RNA complex |
| Answer» Correct Answer - B | |
| 239. |
DNA differs from RNA in-A. Only sugarB. Nitrogen base onlyC. Nitrogen base and sugarD. None |
| Answer» Correct Answer - C | |
| 240. |
At cellular level GH affects growth by controlling the production ofA. r-RNAB. m-RNAC. t-RNAD. None of these |
| Answer» Correct Answer - B | |
| 241. |
Two allelic genes are located onA. the same chromosomeB. Two homologous chromosomesC. twonon-homologous chromosomeD. any two chromosmes |
| Answer» Correct Answer - B | |
| 242. |
According to Mendel, "factors" or "genes"A. are the units of inheritanceB. contain information that is required to express a particular traitC. Both 1 and 2D. None of the above |
| Answer» Correct Answer - C | |
| 243. |
A test cross of `F_(1)` flies +a/+b produced the following offspring `++/ab=9` `ab//ab=9` `+b//ab=41` `a+//ab=41` What will be distance between linked gene :-A. 82 cMB. 18 cM (cis)C. 20 cMD. 18 cM (trans) |
| Answer» Correct Answer - D | |
| 244. |
Assertion :- Simply looking at the phenotype is not possible to known the genotypic composition. Reason :- Mendel performed reciprocoal crossed to know the genotype of dominant organism.A. If both Assertion & Reason are True & the Reason is a correct explanation of the Assertion.B. If both Assertion & Reason are trur but Reason is not a correct explanation of the Assertion.C. If Assertion is True but the Reason is Flase.D. If both Assertion & Reason are false. |
| Answer» Correct Answer - C | |
| 245. |
Mendel onserved that all the `F_(1)` progeny plants.A. remembled either one of the parentsB. resembled neither of the parentsC. resmbled both of the parentsD. show `3:1` ratio |
| Answer» Correct Answer - A | |
| 246. |
A test cross is carried out:A. assess the number of alleles of a gene.B. determine whether two species or varieties will breed successfully.C. determine the genotype of a plant at `F_(2)`D. predict whater two traits are linked. |
| Answer» Correct Answer - C | |
| 247. |
Phenotype of an organism is result ofA. Mutations and linkagesB. Cytoplasmic effects and nutritionC. Environmental changes and sexual dimorphismD. Genotype and environment interactions |
| Answer» Correct Answer - D | |
| 248. |
3 is :-A. `9:3:3:1`B. `1:1:1:1`C. `1:2:2:1`D. `1:1:2:2` |
| Answer» Correct Answer - C | |
| 249. |
AABbCc genotype forms how many types of gametes :-A. 4B. 8C. 2D. 6 |
| Answer» Correct Answer - A | |
| 250. |
In totmato, genotype aabbcc produces 100g tomatoes and AABBCC produces 160g tomatoes. What is contribution of each polygene in the production of tomatoes :-A. 10 gB. 20 gC. 30 gD. 40 g |
| Answer» Correct Answer - A | |