Chapter 7
Basic Processes
EXERCISES:
1. What is the importance of gene expression? What are the steps involved in it?
Answer:
2. Describe the process of regulation of gene expression in prokaryotes by giving example of lac operon.
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3. What would be the effect of loss of all proteins from a cell on DNA replication?
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4. How is the structure of DNA affected by UV rays? Discuss the molecular basis of the type of mutation caused by this type of radiation and the mechanism used by cells to correct them.
Answer:
5. Differentiate between the following
(a) Leading strand and lagging strand
(b) Transcription and translation
(c) Transition and transversion mutation
(d) Codon and anticodon
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6. Which of the following types of radiations is least likely to be harmful to cells?
(a) Gamma rays
(b) Ultraviolet rays
(c) X rays
(d) Alpha rays
Answer:
7. In which of the following DNA repair mechanism is apyrimidinic or apurinic (AP) site formed?
(a) Excision repair
(b) Mismatch repair
(c) Both of the above
(d) None of the above
Answer: