The following molecule is best described as a(n) ________. CH3–CH2–CH2–CH2

A) protein
B) carbohydrate
C) organic compound
D) inorganic compound

C

Biology & Microbiology

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Which of the following creates double-stranded breaks to initiate recombination in eukaryotes?

A. Spo11 B. RuvAB C. Rad50 D. Sgs1 E. Dmc1

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Hereditary retinoblastoma is the result of a(n) ________ in the RB gene of chromosome 13 in both homologues.

A) insertion B) duplication C) inversion D) point mutation E) deletion

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Which animal is NOT able to use sonar as a form of "lightless vision" to navigate in dark environments?  

A.  shrews B.  owls C.  bats D.  whales E.  dolphins

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The loading of dissolved sugars into the sieve tube elements of phloem is:

a. passive transport. b. active transport. c. osmosis. d. simple diffusion. e. facilitated diffusion.

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Biology & Microbiology