Which of the following are present in ALL virions?

a. Ribosomes, nucleic acids, capsid, protomers
b. DNA, capsomeres, capsid, protomers, envelope
c. Capsomeres, nucleic acids, ribosomes, protomers, envelope
d. Nucleic acids, capsomeres, capsid, protomers
e. RNA, capsomeres, capsid, protomers, envelope


Ans: d. Nucleic acids, capsomeres, capsid, protomers

Biology & Microbiology

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Some plants can tolerate flooding conditions by  

A.  formation of aerenchyma. B.  opening their lenticels. C.  forming additional adventitious roots. D.  shedding their bark. E.  pumping water out of their roots.

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An enzyme’s specificity is based on

a. the shape of its active site. b. the amount of activation energy it requires. c. the number of amino acids in its structure. d. the nature of its cofactors. e. none of these.

Biology & Microbiology

A scientist is studying several areas along an elevation gradient. Her study involves prescribed burns (purposefully set, low-intensity fires) in the different areas, followed by a comparison of the type and abundance of organisms that colonize them over the next ten years. What scale best describes her study?  

A. Population ecology B. Physiological ecology C. Ecosystem ecology D. Organismal ecology E. Community ecology

Biology & Microbiology

What name is give to a proposed explanation for a set of observations?

A. observation B. experiment C. theory D. hypothesis

Biology & Microbiology