What is the main sugar used by cells for energy?

A. sucrose
B. glucose
C. aspartame
D. any polysaccharide


B. glucose

Biology & Microbiology

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The energy needed to destabilize existing chemical bonds and start a chemical reaction is called

A. activation energy B. free energy C. kinetic energy D. potential energy

Biology & Microbiology

In meiosis, recombination occurs _______________

A. during prophase I and II and involves exchange of chromosome fragments between all four chromatids B. only during prophase I and involves exchange between chromatids of homologous chromosomes C. only during prophase I and involves exchange of chromosome fragments between sister chromatids D. during prophase I and II and involves exchange of chromosome fragments between sister chromatids

Biology & Microbiology

Reptiles are not able to eat as frequently as mammals and birds can eat. This is due to a trait that mammals and birds share but that reptiles do not have. What is this trait?

A) airfoils B) endothermy C) amniotic egg D) teeth

Biology & Microbiology

The bacterial chromosome is

A) usually found in the cytoplasm. B) found in a nucleoid. C) found in a nucleus. D) both circular and found in a nucleoid. E) both circular and found in a nucleus.

Biology & Microbiology