Percentage of proteins in cell membrane is____________?

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The experiments on DNA molecules in chromosomes for knowing the basis of inherited diseases are conducted by ?

A. Molecular biologists B. Microbiologists C. Freshwater biologists D. Social biologist...

The major cell infected by the HIV is lymphocyte ?

A. helper-T B. B C. both T and B D. none of these...

The main types of plastids are___________?

A. Chloroplasts B. Chromoplasts C. Leucoplasts D. All of these...

The concept that various organisms dominated this planet during various geological time period and thus placing organisms in a time squence came from the studies by________?

A. Environmental biologist B. Paleontologist C. Marine biologist D. Social biologist...

The normal pH of human blood is____________?

A. 6.4 B. 7.0 C. 7.4 D. 7.5...