Murein vs Pseudomurein The majority of Bacteria and Archaebacteria have a rigid cell wall around its plasma membrane. The peptidoglycan (also called murein) cell wall, which is considered as the biomarker of bacteria, is absent in the cell wall of Archaea. However, the members of Archaea show great diversity in their cell wall composition. The […]
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CSRI JRF NET Life Sciences June Model Question (11)
1. Penicillin-resistant bacteria produce β-lactamase which inactivates penicillin by: a. Esterifying the carboxyl group b. Oxidizing S atom c. Hydrolyzing the side chain d. Hydrolyzing the C-N bond Ans. (d) β-lactamases or penicillinase are a class of enzymes produced by some bacteria which degrade penicillin antibiotic and thereby impart resistance against penicillin. All penicillin antibiotics […]
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HSA Natural Sciences Kerala PSC Previous Year Question Paper (2007)
H.S.A. Natural Sciences Previous Question Papers Kerala Public Service Commission (K-PSC) (HSA Natural Science Exam 2006) Original question paper of Kerala PSC HSA (High School Assistant) in Natural Sciences (Biology, Life Science, Botany and Zoology) examination conducted by Kerala PSC (Kerala Public Service Commission) for the appointment of High School Teachers (High School Assistants) in […]
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HSA Natural Sciences Kerala PSC Previous Year Question Paper (3/2006)
H.S.A. Natural Sciences Previous Question Papers Kerala Public Service Commission (K-PSC) (HSA Natural Science Exam 2006) Original question paper of Kerala PSC HSA (High School Assistant) in Natural Sciences (Biology, Life Science, Botany and Zoology) examination conducted by Kerala PSC (Kerala Public Service Commission) for the appointment of High School Teachers (High School Assistants) in […]
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HSA Natural Sciences Kerala PSC Previous Year Question Paper (2/2006)
H.S.A. Natural Sciences Previous Question Papers Kerala Public Service Commission (K-PSC) (HSA Natural Science Exam 2006) Original question paper of Kerala PSC HSA (High School Assistant) in Natural Sciences (Biology, Life Science, Botany and Zoology) examination conducted by Kerala PSC (Kerala Public Service Commission) for the appointment of High School Teachers (High School Assistants) in […]
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