Professional Knowledge Practice Test for IBPS Agricultural Officers

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1. The microbes play an important role in the catalytic complicated chemical reactions of ?
1. Wine productions
2. Fermentation
3. Dairy Product
4. All of the above 
5. None of these
2. Which among the following contains only one type of nucleic acid ?
1. Bacteria 
2. Virus
3. Dead Virus
4. All 
5. None of these
3. The plant virus was first isolated in crystalline form 
1. TMV
2. Baceriophages
3. Cyanophages
4. HIV
5. None of these
4. The molecular scissors used to cut DNA into specific genes of interest are called 
1. Exonucleases
2. Restriction Endonucleases
3. Ligases
4. Polymerases 
5. None of these
5.  The quickest way to produce homozygous breeding lines from heterozygous parents is through :

1. Half-seed technique 
2. Doubled haploids
3. Introgression 
4. Aneuploidy
5. None of these
6. Which of the following organelle lack membrane ?
1. Mitochondria
2. Ribosomes
3. Microtubules
4. Peroxisomes
5. None of these
7. Virions are 
1. DNA vbiruses 
2. RNA viruses
3. Naked DNA viruses 
4. Naked RNA viruses
5. None of these
8. DNA is present in 
1. Nucleus 
2. Mitochondria 
3. Chloroplast 
4. All the above 
5. None of these
9. DNA replication occur in which stage of cell division ?
1. G1 phase 
2. G2 phase
3. S phase
4. M phase 
5. G3 phase 
10. Bt cotton is resistant to bollworm, it is due to 
1. Bt is repellent to bollworm
2. Bt is contact poison for bollworm 
3. Bt is stomach poison; it changes the permeability of stomach due to generation of pores n alkaline environment of stomach 
4. Bt is causing death due to asphagsiation of insect
5. None of these
11. Bacterial genes lack 
1. Exons
2. Introns
3. Promoters 
4. Operator 
5. None of these
12. The terminal condons are 
1. AUG, GUG, GUC
2. UAG, UAA, AGA
3. UAA, UAC, AUG
4. UAA, UAG, UUA
5. None of these
13. Which sequence in case of eukaryotes is important for mRNA tailing ?
1. GAGAGA
2. GAATTC
3. UACGAC
4. UACUAAC
5. None of these
14. Transfer of genes (gene flow) in between different species is known as ?
1. Vertical gene flow
2. Horizontal gene flow 
3. Lateral gene flow 
4. Side gene flow 
5. None of these
15. Most commonly used organism in SCP is 
1. Bacillus 
2. E. coli
3. Spirulina
4. Pseudomonas 
5.  None of these
16. The bond between sugar and nitrogenous base in case of DNA is known as ?
1. Gycosidic bond 
2. Phosphodiester bond
3. H-bond 
4. Peptide bond 
5. N-bond
17. Which of the following amino acid participate in urea cycle ?
1. Arginine 
2. Lysine 
3. Tryptophan 
4. Histidine 
5. None of these
18. The techniques to clone the first gene were developed in ?
1. 1972
2. 1987
3. 1976
4. 1977
5. 1980
19. Biosensers are used in ?
1. Purified enzymes 
2. Antibodies 
3. Whole microbial cells 
4. Any of the above 
5. None of these
20. Which enzyme plays important role in reverse transcription ?
1. DNA plymerase 
2. RNA plymerase 
3. Reverse transcriptase 
4. Ribonuclease 
5. None of these

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