Which term describes two recently replicated DNA strands that are joined together just before cell division?

A. Sister chromatids
B. Centromere
C. Centrosome
D. Centriole


Ans: A. Sister chromatids

Biology & Microbiology

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Which of the following are true about ecosystems? Check all that apply. 

_____ They contain both living and nonliving components. _____ There is a transfer of energy through the system and some energy is lost as heat energy. _____ Nutrients repeatedly cycle through the ecosystem. _____ They represent the lowest level of biological organization. _____ The ultimate source of energy for most ecosystems is the sun.

Biology & Microbiology

Which of the following is not true of industrial microbiology?

A. Growth environment is enhanced to increase metabolite synthesis. B. Select microbial strains are not controlled by feedback mechanisms. C. Secondary metabolites include amino acids. D. Primary metabolites are essential to a microbe's function.

Biology & Microbiology

Bacterial cell walls that are resistant to drying contain

A) carbohydrates. B) amino acids. C) lipopolysaccharide. D) tubulin. E) waxes.

Biology & Microbiology

The Adeno-Associated Virus (AAV) and the Delta Agent are prions.

Answer the following statement true (T) or false (F)

Biology & Microbiology