General microbiology

A. Phage-typing of the isolated pure culture
B. Antibiogram C. Precipitation reaction
D. Complement-fixation reaction E. Neutralization reaction
5. In the surgical department of a dental clinic cases of hospital-acquired staphylococcal infection were registered which was caused by strains with multiple drug resistance. Such feature can be identified by presence of:
A. R-plasmids B. F-plasmids C. Exotoxins
D. Temperate bacteriophages E. Virulent bacteriophages
6. RNA that contains AIDS virus penetrated into a leukocyte and by means of reverse transcriptase forced a cell to synthesize a viral DNA. This process is based upon:
A. Reverse transcription B. Operon repression
C. Reverse translation D. Operon depression
E. Convariant replication
7. During reproduction of some RNA-containing viruses that cause tumors in animals, genetic information can be transmitted in the opposite direction from the RNA to the DNA via a specific enzyme. The enzyme of reverse transcription is called:
A. Reverse transcriptase B. DNA polymerase
C. Ligase D. Primase E. Topoisomerase
8. It was revealed that T-lymphocytes were affected by HIV. Virus enzyme - reverse transcriptase (RNA-dependent DNA polymerase) - catalyzes the synthesis of:
A. DNA on the matrix of virus mRNA
B. Virus informational RNA on the matrix of DNA
C. DNA on virus ribosomal RNA D. Viral DNA on DNA matrix
E. mRNA on the matrix of virus protein
9. A doctor was addressed by a 30-year old man. There is a probability of the patient being HIV-positive. To clarify the diagnosis the doctor proposed to perform polymerase chain reaction. The basic process in this kind of investigation is:
A. Gene amplification B. Transcription
C. Genetic recombination D. Genomic mutation
E. Chromosome mutation
10. In the course of evolution there developed molecular mechanisms for correction of damaged DNA molecules. This process is called:
A. Reparation
B. Transcription
C. Translation
D. Replication
E. Processing
11. Genetic information is stored in DNA but does not participate directly in protein synthesis within DNA cells. What process ensures transfer of genetic information into polypeptide chain?
A. Translation
B. Formation of rRNA
C. Formation of tRNA
D. Formation of iRNA
E. Replication
Special
A man is a carrier of HIV that is an RNA virus. The cells of this patient synthesize viral DNA. This process is based on:
A. Transcription
B. Repair
C. Replication