What is the relationship between topoisomers?
What will be an ideal response?
They are molecules of DNA that differ in their linking numbers (L) but are otherwise identical.
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Homologous chromosomes may differ from each other in terms of:
a. size. b. shape. c. position of the centromere. d. alleles. e. number of genes.
The G1, S, and G2 phases of the cell cycle are collectively known as
A. meiosis. B. metaphase. C. prophase. D. interphase. E. mitosis.
Nitrogen-fixing bacteria convert gaseous nitrogen into:a
amino acids. b. phosphate. c. ammonia. d. nitrite.
e. nitrate.Why did Alexander Fleming suspect he could get penicillin from a species of mold?
A) Soldiers drinking fermented alcohol were less likely to have bacterial infections. B) Patients infected with a fungus like, athlete's foot, were less likely to have bacterial infections. C) Soldiers eating moldy bread were not suffering from wound infections. D) Bacteria on culture plates were unable to grow near mold contamination. E) Wounds with superficial mold on the bandages were not becoming septic.