The probability of a hit is increased with _____ oxygen and _____ LET radiation.

a) high, low
b) low, low
c) high, high
d) low, high


Ans: c) high, high

Biology & Microbiology

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

1. DNA helicase and topoisomerase are similar insofar as they promote the unwinding and uncoiling of DNA. 2. If the sequence for one strand of DNA is 3?-TCGATT-5? then its complementary strand would have a sequence of 3?-AGCTAA-5?. 3. Okazaki fragments are sequences of DNA most often found on the lagging strand of DNA during DNA replication. 4. The progressive shortening of telomeres in DNA correlates with cell senescence.

Biology & Microbiology

Of the following, the social trend that would cause the fastest population increase is ________

A) declining fecundity B) lower nutritional values C) more older men getting married D) decreasing age of first pregnancy

Biology & Microbiology

Which of the following sequences of events is most characteristic of a generalized plant life cycle? 

A. sporophyte ® mitosis ® spore ® gametophyte ® gamete ® zygote B. sporophyte ® meiosis ® spore ® gametophyte ® gamete ® zygote C. gametophyte ® meiosis ® spore ® sporophyte ® gamete ® zygote D. gametophyte ® mitosis ® spore ® sporophyte ® gamete ® zygote

Biology & Microbiology

A new virus is discovered that has double stranded DNA and no envelope. The highly purified virions form large crystals. This new virus is most likely a member of which virus family?

A) Adenoviridae B) Herpesviridae C) Papillomarviridae D) Poxviridae E) Papillomaviridae

Biology & Microbiology