Which of the following is not a property of a virus?
A) It is an infectious cellular pathogen.
B) It is an obligate intracellular pathogen.
C) Its genome consists of DNA or RNA.
D) Its genome is surrounded by a protein capsid.
Ans: A) It is an infectious cellular pathogen.
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The morphology of plants is determined
A. by cell division at the tip of the shoots and cell elongation at the tip of the roots. B. by cell division at the tip of the roots and cell elongation at the tip of the shoots. C. by cell elongation at both the tip of the shoots and the roots. D. by cell death (apoptosis) along the radial axis. E. by cell division at both the tip of the shoots and the roots.
Genotype can always be inferred from phenotype
__________________ Indicate whether the statement is true or false.
Which of the following plant types complete their life cycle in 2 years?
A) annuals only B) annuals and perennials C) biennials only D) perennials only
Rheumatic fever is a sequalae of repeated infection with streptococcus pyogenes. The pathogenesis involved in this complication is
A. Antigen-antibody complex precipitation on the valves of the heart B. Molecular mimicry in which some of the bacterial proteins resembles those of endocardium C. An immunological response to a specific Protein A D. An immunological response in the antigen determining the Lancefield classification of the bacterium