What is the main sugar used by cells for energy?
A. sucrose
B. glucose
C. aspartame
D. any polysaccharide
B. glucose
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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
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
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
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.