41. All the following are basic properties of cells except
A. cells have nuclei and mitochondria
B. cells have a genetic program and the means to use it
C. cells are capable of producing more of themselves
D. cells are able to respond to stimuli
42. Which of the following microorganisms is classified as a member of archaebacteria?
A. Cyanobacteria
B. Methanobacteria
C. Trichomonads
D. Mycoplasma
43. The idea of selective toxicity was first proposed by
A. Antony van Leeuwenhoek
B. Paul Ehrlich
C. Louis Pasteur
D. Alexander Fleming
44. Which of the following sequences has helped in identifying eukaryotes, eubacteria and archaebacterial cell types?
A. Signature sequence
B. Signal sequence
C. Shine-Dalgarno sequence
D. Amino acid sequence
45. Archeal cells usually do not contain peptidoglycan, rather contain pseudo-peptidoglycan which is mainly composed of
A. N-acetylmuramic acid and L-amino acids
B. N-acetylmuramic acid and D-amino acids
C. N-acetyltalosaminuronic acid and D-amino acids
D. N-acetyltalosaminuronic acid and L-amino acids