Microorganisms Questions & Answers - Page 12

56.

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 contains 70S ribosomes

D.

Gas vacuoles are present

Correct answer is D

No explanation has been provided for this answer.

57.

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 is D

No explanation has been provided for this answer.

58.

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 is D

No explanation has been provided for this answer.

59.

The unifying feature of the archaea that distinguishes them from the bacteria is

A.

habitats which are extreme environments with regard to acidity

B.

absence of a nuclear membrane temperature

C.

presence of a cell wall containing a characteristic outer membrane

D.

cytoplasmic ribosomes that are 70S

Correct answer is B

No explanation has been provided for this answer.

60.

Which were the investigators who lived at the same time?

A.

Koch and Pasteur

B.

Darwin and Woese

C.

Van Leeuenhoek and Ricketts

D.

Berg and Hooke

Correct answer is A

No explanation has been provided for this answer.