HPRCA Assistant Staff Nurse Exam 2026
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MCQs on Structure of DNA and RNA for Staff Nurse and Medical Exams
The HPRCA Assistant Staff Nurse Exam 2026 is conducted by the Himachal Pradesh Rajya Chayan Aayog (HPRCA) to recruit eligible and qualified candidates for the post of Assistant Staff Nurse in various government health institutions across Himachal Pradesh. This recruitment drive offers a valuable opportunity for nursing professionals seeking a stable and respectable career in the state government healthcare sector.
Aspiring candidates preparing for the HPRCA Assistant Staff Nurse Exam 2026 should focus on the updated syllabus, practice previous years’ questions, and regularly check official announcements for exam dates, admit cards, and result updates.
To help candidates in their exam preparation, we have brought a collection of important MCQ questions specially prepared for the HPRCA Assistant Staff Nurse Exam 2026. These MCQs are designed on the basis of the latest exam pattern and syllabus, and will help candidates to practice, revise important topics, and improve their accuracy and confidence before the exam.
Q1. A peculiar cytochrome is observed in bacteria and reacts with molecular oxygen?
(A) Cyt b
(B) Cyt c
(C) Cyt d
(D) Cyt o
Answer: (D) Cyt o
Q2. The genetic material in HIV is
(A) ds DNA
(B) ss DNA
(C) ss RNA
(D) None of these
Answer: (C) ss RNA
Q3. Which mutagen acts only on replicating DNA?
(A) Ethidium bromide
(B) Nitrosoguanidine
(C) Acridine orange
(D) None of the above
Answer: (B) Nitrosoguanidine
Q4. Poly-A tail is commonly found in
(A) Histone RNA
(B) Bacterial RNA
(C) Eukaryotic RNA
(D) tRNA
Answer: (C) Eukaryotic RNA
Q5. Which is an RNA virus?
(A) SV-40
(B) T4 phage
(C) Tobacco mosaic virus
(D) Adenovirus
Answer: (C) Tobacco mosaic virus
Q6. Cloned DNA fragments collectively are called
(A) Clones
(B) Genomic library
(C) mRNA
(D) None of these
Answer: (B) Genomic library
Q7. Transgenic animals are produced when GH gene is fused with
(A) MT gene
(B) GH gene
(C) GRF gene
(D) FIX gene
Answer: (A) MT gene
Q8. Hybridoma cells grow selectively in
(A) Polyethylene glycol
(B) HAT medium
(C) HGPRT medium
(D) Both B and C
Answer: (B) HAT medium
Q9. Common enzymes used in genetic engineering are
(A) Exonuclease and ligase
(B) Restriction endonuclease and polymerase
(C) Ligase and polymerase
(D) Restriction endonuclease and ligase
Answer: (D) Restriction endonuclease and ligase
Q10. A successful hybridoma is formed by fusion of
(A) Plasma cells and plasmids
(B) Plasma cells and myeloma cells
(C) Myeloma cells and plasmids
(D) Plasma cells and bacterial cells
Answer: (B) Plasma cells and myeloma cells
Q11. Technique used to compare DNA samples is
(A) Monoclonal antibody technique
(B) Genetic fingerprinting
(C) Recombinant DNA technology
(D) PCR
Answer: (B) Genetic fingerprinting
Q12. Plasmids are ideal vectors because
(A) They multiply by culturing
(B) They replicate using enzymes in lab
(C) They replicate outside cells
(D) They self-replicate inside bacteria
Answer: (D) Self-replicating in bacteria
Q13. Number of autosomes in a human kidney cell is
(A) 46
(B) 23
(C) 47
(D) 44
Answer: (D) 44
Q14. Pasteur effect occurs due to
(A) Shift to anaerobic respiration
(B) Oxygen supply to anaerobic cells
(C) Rapid ATP utilization
(D) Non-synthesis of ATP
Answer: (B)
Q15. Gene movement between linkage groups is called
(A) Translocation
(B) Inversion
(C) Crossing over
(D) Duplication
Answer: (A) Translocation
Q16. Smallest unit of mutation is
(A) Gene
(B) Cistron
(C) Replicon
(D) Muton
Answer: (D) Muton
Q17. Two chromatids of metaphase chromosome are
(A) Replicated chromosomes
(B) Homologous chromosomes
(C) Non-homologous chromosomes
(D) Maternal and paternal chromosomes
Answer: (A) Replicated chromosomes
Q18. Malate dehydrogenase is a
(A) Transferase
(B) Hydrolase
(C) Isomerase
(D) Oxidoreductase
Answer: (D) Oxidoreductase
Q19. att site in E. coli lies between
(A) Gal and bio genes
(B) Bio and niacin genes
(C) Gal and B genes
(D) None of these
Answer: (A) Gal and bio genes
Q20. Best vector for gene cloning is
(A) Relaxed plasmid
(B) Stringent plasmid
(C) Both A and B
(D) None
Answer: (A) Relaxed plasmid
Q21. Gene involved in polypeptide synthesis is
(A) Structural gene
(B) Regulator gene
(C) Operator gene
(D) Promoter gene
Answer: (A) Structural gene
Q22. DNA replication occurs in
(A) G1 phase
(B) S phase
(C) G2 phase
(D) M phase
Answer: (B) S phase
Q23. Cell with 22 autosomes and Y chromosome is
(A) Male somatic cell
(B) Zygote
(C) Female somatic cell
(D) Sperm
Answer: (D) Sperm
Q24. Crossing over occurs during
(A) Prophase I
(B) Prophase II
(C) Anaphase I
(D) Telophase II
Answer: (A) Prophase I
Q25. DNA replication is
(A) Conservative
(B) Semiconservative
(C) Dispersive
(D) None
Answer: (B) Semiconservative
Q26. RNA synthesis from DNA is called
(A) Translation
(B) RNA splicing
(C) Transcription
(D) Transposition
Answer: (C) Transcription
Q27. Nucleic acids contain
(A) Alanine
(B) Adenine
(C) Lysine
(D) Arginine
Answer: (B) Adenine
Q28. Structural unit of nucleic acids is
(A) Nitrogen base
(B) Nucleoside
(C) Nucleotide
(D) Histone
Answer: (C) Nucleotide
Q29. Primary function of a gene is to synthesize
(A) Enzymes
(B) Hormones
(C) RNA
(D) DNA
Answer: (C) RNA
Q30. X-linked gene in humans controls
(A) Baldness
(B) Red-green colour blindness
(C) Facial hair growth
(D) Night blindness
Answer: (B) Red-green colour blindness
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