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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.
| 101. |
Nucleic acid can be fragmented by the enzyme `:`A. ligaseB. protasasC. nucleaseD. polymerases |
| Answer» Correct Answer - C | |
| 102. |
In a DNA molecule, the adenine is `15%` . What will be the percentage of guanine in this DNA ?A. 0.15B. 0.35C. 0.7D. 0.3 |
| Answer» Correct Answer - B | |
| 103. |
In a nucleotide having a cytosine base and linked to a sugar by glycosidic bond at carbon number `:`A. 1B. 2C. 4D. 5 |
| Answer» Correct Answer - A | |
| 104. |
DNA is double helix and `:`A. complementary and antiparallelB. complementary and parallelC. without supercoilsD. always circular |
| Answer» Correct Answer - A | |
| 105. |
AGCT are nitrogenous bases of DNA. The pairing is `:`A. `A-G,C-T`B. `A-T,G-C`C. `A-C,G-T`D. `A-T,G-T` |
| Answer» Correct Answer - B | |
| 106. |
The following diagrams represent the nitrogenous bases of nucleic acid molecules. Identify the correct combination `:` A. A= uracil, B= guanine, C=cytosine,D=adenine,E=thymineB. A=thymine,B=adenine,C=cytosine,D=guanine,E=uracilC. A=uracil,B=adenine,C=thymine,D=guanine, E=cytosineD. A=uracil,B=guanine,C=thymine,D=adenine,E=cytosine |
| Answer» Correct Answer - C | |
| 107. |
The given organic compound is a diagrammatic representation of `:` A. lecithinB. uridineC. adenosineD. adenylic acid |
| Answer» Correct Answer - D | |
| 108. |
The double helix of DNA is made of polynucleotide chains where backbone constituted by sugar-phosphate and bases are projected `:`A. insideB. outsideC. one base inside and the other outsideD. bases remain in line of sugar - phosphate |
| Answer» Correct Answer - A | |
| 109. |
Among the nitrogenous bases involved in DNA and RNA formation, the double ring base is `:`A. uracilB. guanineC. thymineD. cytosine |
| Answer» Correct Answer - B | |
| 110. |
In sea urchin DNA, which is double stranded, 17% of the bases were show to be cytosine. The percentages of the other three bases expected to be present in this DNA areA. `G 17 %, A 33%, T 33%`B. `G 8.5%,A 50%, T 24.5%`C. `G 34%,A 24%, T 24.5%`D. `G 17 % , A 16.5%, T 32.5%` |
| Answer» Correct Answer - A | |
| 111. |
A stretch of DNA consisting of 10-20 bases is most appropriately be called as `:`A. nucleotidesB. nucleosidesC. polynucleotideD. oligonucleotide |
| Answer» Correct Answer - D | |
| 112. |
DNA-dependent RNA polymerase catalyzes transcription on one strand of the DNA which is called the `:`A. Alpha strandB. AntistrandC. template strandD. Coding strand |
| Answer» Correct Answer - C | |
| 113. |
Whose experiments cracked the DNA and discovered unequivocally that a genetic code is a "triplet " ?A. Beadle and TatumB. Hershey and ChaseC. Nirenberg and MatthaeiD. Morgan and Sturtevant |
| Answer» Correct Answer - C | |
| 114. |
The genetic trnsformation experiments on Diplococcus pneumoniae gave first undoubted evidence that `:`A. DNA is the genetic materialB. DNA is made of nucleotidesC. Chromosomes are made of DNAD. RNA is synthesized on a DNA template |
| Answer» Correct Answer - A | |
| 115. |
If one strand of DNA has the sequence CAT, GAC, TAG, what would be the base sequence in the other strand ?A. GTA, CTG,ATCB. GAT,GTC,ACTC. TAC,ACT,GCTD. CAT,TAG, GAC |
| Answer» Correct Answer - A | |
| 116. |
If the total amount of adenine and thymine in a double stranded DNA is 45% the amount of guanine this DNA will be `:`A. 0.45B. 0.55C. `22.5%`D. `27.5%` |
| Answer» Correct Answer - D | |
| 117. |
If the total amount of adenine and thymine in a double-stranded DNA is `60%` , the amount of guanine in this DNA will be `:`A. `15%`B. `20%`C. `30%`D. `40%` |
| Answer» Correct Answer - B | |
| 118. |
Watson and Crick got Noble Prize for proposing DNA model in the year `:`A. 1959B. 1962C. 1968D. 1990 |
| Answer» Correct Answer - B | |
| 119. |
The method developed by Matthew Meselson and Franklin Stahl to separate heavy DNA with` ^(15)`N from DNA with `^(14)` N, for providing evidence for semi- conservative replication of DNA isA. gel filtrationB. isopycnic centrifugationC. buoyant density centrifugationD. ion exchange chromatography |
| Answer» Correct Answer - C | |
| 120. |
The unequivocal proof of DNA as the genetic material came from the studies on `:`A. FungusB. ViroidC. BacteriumD. Bacterial virus |
| Answer» Correct Answer - D | |
| 121. |
The first every experiment evidence showing DNA as genetic material in bacteriophages came from the studies of `:`A. WeismannB. Beadle and TatumC. Hershey and ChaseD. Schleiden and Schwann |
| Answer» Correct Answer - C | |
| 122. |
Who proved that DNA is the basic genetic material ?A. James WatsonB. Frederick GriffithC. Hershey and ChaseD. Sutton and Boveri |
| Answer» Correct Answer - C | |
| 123. |
Transformation efficiency of bacteria ( as in the experiment of Avery et al.) would be drastically reduced if the tranforming material is treated with `:`A. lipaseB. ribonucleaseC. proteaseD. deoxyribonuclease |
| Answer» Correct Answer - D | |
| 124. |
E. coli about to replicate was placed in a medium containing radioactive thymidine for five minutes. Then it was made to replicate in a normal medium. Which of the following observation will be correct ?A. Both the strands of DNA will be radioactiveB. Each strand half radioactiveC. One strand radioactiveD. None is radioactive |
| Answer» Correct Answer - C | |
| 125. |
The proteins associated with nucleic acids are `:`A. albuminsB. histonesC. globulinsD. lipoproteins |
| Answer» Correct Answer - B | |
| 126. |
Prokaryotic genetic material possesses `:`A. DNA but no histonesB. Either DNA or histonesC. Both DNA and histonesD. Neither DNA nor histones |
| Answer» Correct Answer - A | |
| 127. |
A bacteriophage with radioactive DNA and protein when infects a bacterium the radioactivity inside the bacterium will be located in `:`A. DNAB. proteinC. Both DNA and proteinD. All parts of bacteria cell |
| Answer» Correct Answer - A | |