List of top Questions asked in GATE XL

Which of the following statements are TRUE for archaea?
If the plasmid given below is digested with restriction enzymes HindIII and EcoRI, considering complete digestion, how many DNA fragments will be released?
Escherichia coli growing under favorable conditions doubles in every 20 minutes. If the initial number of Escherichia coli cells is 100, what will be the logarithmic number of cells at 17th generation? (Answer up to 1 decimal place)
The antimicrobial activity of vancomycin is due to the _________.
Phenolics act as disinfectant by _________.
Which of the following methods are used for the identification of microorganisms?
Which of the following are present in Gram-negative bacteria?
Nonsense suppressor mutation is found in _________.
Choose the correct match for structural components of bacteria to their function.
Match the pathogen with the appropriate disease.
Which of the following is/are phanerogamic parasite(s)?
When a true breeding tall plant containing red flowers was crossed with the true breeding dwarf plant containing white flowers, all F1 plants were tall with red flowers. When the F1 plant was self-pollinated, considering independent assortment of plant height and flower colour traits, the calculated percentage probability of dwarf plants bearing red flowers in the F2 generation is ________ percent (round off to 2 decimal places).
A hypothetical plant gene ADSH22 is encoded by the nuclear genome. The length of the mature mRNA for ADSH22 is 2150 nucleotides (nts). This mRNA has a 270 nts long 5' UTR and 200 nts long 3' UTR. Taking average molecular weight of an amino acid as 115 Dalton (Da), the calculated molecular weight of ADSH22 protein is ________ kDa (round off to 1 decimal place).
Which one of the following mutagens convert DNA’s adenine to hypoxanthine?
Which one of the following leukocytes are present in the largest proportion in healthy human blood?
The site of photosynthesis in cyanobacteria is ________.
Match the secondary metabolites in Group-I with types of secondary metabolites in Group-II in CORRECT order.
Which one of the following combinations is correct?
Match Group-I (enzyme), Group-II (reaction catalyzed by the enzyme), and Group-III (subcellular localization of the enzyme and the associated metabolic process) in the CORRECT combination.
Match Group-I (selection agent) and Group-II (gene) in CORRECT combination.
Match Group I (plant natural product), Group II (class) and Group III (source plant) in CORRECT combination.
Match Group I (plant disease), Group II (causal organism) and Group III (affected plant) in \textbf{CORRECT combination.}
Make CORRECT match between Group-I and Group-II, in relation to interaction between two species.
Which one of the following combinations is correct?
Which of the following matches is/are CORRECT?
With reference to virulence (vir) region of nopaline type Ti plasmid of Agrobacterium tumefaciens, match Group-I (vir gene) and Group-II (coded protein) in CORRECT combination.
Which one of the following combinations is correct?
Anomalous secondary growth is observed in