NEET Biotechnology Questions – Paper 04, Total Questions: 20, Subject: Biology, Topic: Biotechnology, Type: MCQs (Multiple Choice Questions)
| Sr. No. | Questions | Answers |
| 1. | Distance between two successive nitrogenous bases or base pairs of DNA is (a) 34 Å (b) 3.4 Å (c) 10 Å (d) 5 Å |
Answer: (b) |
| 2. | DNA and RNA are similar in having (a) Similar nucleotides (b) Similar pyrimidines (c) Similar purines (d) Similar sugars |
Answer: (c) |
| 3. | DNA and RNA show similarity in having (a) Polymers of nucleotides (b) Similar pyrimidines (c) Double strands (d) Similar sugars |
Answer: (a) |
| 4. | DNA does not occur in (a) Nucleus (b) Ribosomes (c) Mitochondria (d) Plastids |
Answer: (b) |
| 5. | DNA duplex shows (a) Right handed coiling and parallel (b) Right handed coiling and antiparallel (c) Left handed coiling and antiparallel (d) Left handed coiling and parallel |
Answer: (b) |
| 6. | DNA is composed of repeating units of (a) Ribonucleosides (b) Deoxyribonucleosides (c) Ribonucleotides (d) Deoxyribonucleotides |
Answer: (d) |
| 7. | DNA replication in eucaryotes commences (a) From both ends of a chromosome simultaneously (b) Several sites along DNA of a chromosome simultaneously (c) From centromere to either end (d) From one end of chromosome to the other |
Answer: (b) |
| 8. | DNA replication is (a) Conservative and discontinuous (b) Semiconservative and semidiscontinuous (c) Semiconservative and discontinuous (d) Conservative |
Answer: (c) |
| 9. | DNA resembles RNA as both have (a) Polymers of nucleotides (b) Similar sugars (c) Similar pyrimidine bases (d) Ability to replicate |
Answer: (a) |
| 10. | DNA sequence is ATG. What would be the sequence of bases in anticodon of tRNA (a) ATG (b) AUG (c) UAC (d) TAC |
Answer: (b) |
| 11. | DNA sequence is TAG. What shall be the sequence in anticodon of tRNA (a) UAG (b) ATC (c) ATG (d) UAC |
Answer: (a) |
| 12. | DNA sequence of ATTCGATG is transcribed as (a) AUUCGAUG (b) UAAGCUAC (c) CAUCGAAU (d) GUAGCUUA |
Answer: (b) |
| 13. | DNA strand with nitrogen base sequence ATTGCC will have sequence in mRNA (a) UAACGC (b) ATCGCC (c) ATTGCA (d) AGGACC |
Answer: (a) |
| 14. | Double chained DNA strand is made radioactive in both its chains. It is allowed to replicate twice in non-radioactive medium. The result would be (a) All strands have radioactivity (b) Half the strands have radioactivity (c) Three strands have radioactivity (d) Radioactivity is absent in all strands |
Answer: (b) |
| 15. | Double helical structure of DNA was proposed by (a) Kornberg (b) Nirenberg (c) Watson and Crick (d) Wilkins and Franklin |
Answer: (c) |
| 16. | Functional unit of gene that specifies synthesis of one polypeptide is (a) Codon (b) Cistron (c) Recon (d) Muton |
Answer: (b) |
| 17. | Gene is segment of (a) RNA (b) DNA (c) RNA or DNA (d) Both DNA and RNA |
Answer: (b) |
| 18. | Genetically engineered bacteria are being used in commercial production of (a) Melatonin (b) Testoteron (c) Human insuline (d) Thyroxine |
Answer: (c) |
| 19. | Haploid plant cultures are got from (a) Leaves (b) Root tip (c) Pollen grain (d) Buds |
Answer: (c) |
| 20. | Hydrogen bonds present between cytosine and guanosine are (a) 2 (b) 3 (c) 1 (d) 4 |
Answer: (b) |