Gene Expression in Prokaryotes and Viruses
Questions covering transcription, RNA processing, bacterial gene transfer mechanisms, and bacteriophage gene expression systems
Questions
RNA polymerase I is required for the synthesis of
- mRNA
- tRNA
- rRNA
- DNA
What is the sequence of nucleotides in Pribnow box?
- ATATTA
- TATAAT
- UAUAAT
- TATAAA
Which of the following steps are involved in post transcriptional modification of pre-mRNA?
- 5' capping
- 3' polyadenylation
- RNA splicing
- All of the above
Which of the following yields functional RNA as a gene product?
- Sn RNA
- t-RNA
- Both (1) and (2)
- m RNA
By which process does bacteriophage express its genes?
- Lysis
- Lysogeny
- Both (1) and (2)
- Transduction
Genes whose products are constantly needed for the maintenance of the cells are called
- inducible genes
- constitutive genes
- facultative genes
- housekeeping genes
By which process is the phage transmitted to the progeny of bacteria?
- Transduction
- Liberation
- Induction of prophage
- Lysogeny
Gene expression by teminism is observed in
- ΦX174
- TMV (Tobacco Mosaic virus)
- RSV (Rous Sarcoma virus)
- mumps virus
Which process takes place in vegetative phase of lytic cycle?
- RNA replication
- DNA replication
- Enzyme synthesis
- Liberation of phages
What is merozygote?
- Recombinant formed in transformation
- Combination of bacterial and temperate phage genome
- Temporary RNA-DNA diploid formed during reverse transcription
- Two bacteria joined by conjugation tube
Gene expression in bacteria takes place by
- transformation
- transcription
- replication
- Both (3) and (2)
Who proposed that each gene in an organism controls the production of specific enzymes?
- Temin and Baltimore
- Jacob and Monad
- Beadle and Tatum
- Nirenberg and Khorana