Which of these microbial products is needed to produce "gasohol"?
A) citric acid
B) methanol
C) ethanol
D) hyaluronidase
E) aspartame
C
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Chemists use the term "organic compounds" to refer to molecules that ________
a. contain the carbonyl or carboxyl functional groups b. are formed entirely of carbon and hydrogen c. contain primarily carbon and hydrogen d. are created only in living organisms
met refers to a gene that governs a cells ability to synthesize methionine from inorganic precursors
The designation met- indicates:
a. that the allele is normal. b. that the allele is the mutant allele. c. that the bacterium is biologically active. d. that the bacterium is biologically inactive. e. that the bacterium can make its own methionine.
Why are food chains limited to a small number of links?
What will be an ideal response?
What do you know about sex determination in animals? Pick the correct statement from the list below.
A: In all animals, females normally have two XX chromosomes. B: In all animals, males have two different sex chromosomes; i.e., are heterogametic. C: Dioecious organisms, the two sexes are different individuals that differ in their chromosomal make-up. D: In both fruit flies and mammals, individuals with a Y chromosome always develop as males.