Micro Organisms – Section 1

6. Mycoplasmas are different from the other prokaryotes by

A. presence of chitin in cell walls
B. presence of murrain in cell walls
C. presence of proteins in cell walls
D. absence of cell wall itself

Correct Answer: D. absence of cell wall itself

7. Evolutionary relationships between groups of organisms are determined using which of the following type of information?

A. Comparisons of nucleotide sequences
B. Comparisons of biochemical pathways
C. Comparisons of structural features
D. All of the above

Correct Answer: D. All of the above

8. Which of the following is not true for eukaryotic cells?

A. Nucleus is bounded by nuclear membrane
B. Chromosomes contain histones
C. Chloroplasts and mitochondria contain 70S ribosomes
D. Gas vacuoles are present

Correct Answer: D. Gas vacuoles are present

9. Which of the following is not true for the prokaryotic organisms?

A. Nucleus is not bounded by nuclear membrane
B. Chromosomes does not contain histones
C. 80S ribosomes are distributed in cytoplasm
D. Cell wall contains peptidoglycan as one of the major components

Correct Answer: C. 80S ribosomes are distributed in cytoplasm

10. Gram staining was introduced by

A. Christian gram
B. Alfred Gram
C. Robert cook
D. Louis Pasteur

Correct Answer: A. Christian gram

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