Tag: CSIR NET Life Science Previous Year Questions and Solution Genetics

15. Five bacterial markers were followed for a co- transduction experiment. The following table documents the observations of this experiment. ‘+’ denotes co- transduction and ‘-‘ denotes lack thereof; ‘ND’ […]

14. Phages are collected from an infected E. coli donor strain of genotype cys+ Leu+ thr+ and used to transduce a recipient of genotype cys– Leu– thn–, The treated recipient […]

22 TRANSDUCTION WAS USED TO MAP THE fadL and two linked markers, purF and aroC are shown below. Which one of the following is the correct map for the three […]

A co-transduction experiment was performed to decipher the linear order of 4 genes: a, b, c and d. Three sets of experiments were done where transductants were selected for a […]

In a transduction experiment using genotype as a donor and a+b+c+ as a donor and a–b–c– as the recipient, a+ transductants were selected and screened for b and c. The […]

10. What is prophage (1) λ phage DNA (2) Stage of cell cycle (3) DNA of temperate phage inserted into host chromosome (4) A transposons Introduction Prophage represents a key […]

9. Transduction has been used extensively for genome mapping for bacteria. Which of the following process is useful for gene mapping? (1) Generalized transduction (2) Specialized transduction (3) Site specific […]

8. λ-phage insert their DNA into bacterial host. The site for recombination on host is termed as- (1) attp         (2) attB (3) Xis          (4) Int λ-phage inserts its DNA into […]

An experiment was designed to find out the relation between DNA uptake and transformation efficiency. 32P- labelled genomic DNA from Bacillus subtilis (A) and cold genomic DNA from Clostridium Jejeuni […]

6. In a transformation experiment, donor DNA from an E. coli strain with the genotypes was used to transform a strain of genotype Z+Y+. The frequencies of transformed classes were: […]