Sugar and salt act as preservatives by
A. inhibiting bacterial enzymes.
B. producing oils that inhibit bacterial growth.
C. inhibiting DNA replication.
D. drawing water out of microbes.
E. killing endospores.
Answer: D
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Chromosomes can be condensed into compact structures, visible with the light microscope, but usually only:
A. while the nuclear pores are open. B. while the proteins are being assembled. C. after the cell is dead. D. while the DNA is being copied into RNA. E. during cell division.
DNA photolyase, in the presence of visible light, can repair DNA damage due to ultraviolet radiation.
Answer the following statement true (T) or false (F)
Which of the following mutations will not alter the amount of genetic material on the chromosomes?
A. duplication B. inversion C. simple translocation D. deficiency E. inversion and simple translocation
The notochord persists into adulthood in all chordates
Indicate whether the statement is true or false