The enzyme fumarase catalyzes the reversible hydration of fumaric acid to l-malate, but it will not catalyze the hydration of maleic acid, the cis isomer of fumaric acid. This is an example of:
A) biological activity.
B) chiral activity.
C) racemization.
D) stereoisomerization.
E) stereospecificity.
Ans: E) stereospecificity.
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The maximum number of organisms that can be sustained in a particular environment is known as what?
a. maximum yield b. maximum load c. carrying capacity d. growth capacity
When X-linked traits are recessive,
A. males who express the trait receive the recessive allele from their mothers. B. males who express the trait receive the recessive allele from their fathers. C. males who express the trait must receive recessive alleles from both parents. D. males who express the trait carry the recessive allele on their X chromosome. E. males who express the trait receive the recessive allele from their mothers and carry the recessive allele on their X chromosomes.
A fragment of DNA or RNA labeled with a tracer that can hybridize with a nucleotide sequence of interest is referred
to as a ____.
a. clone b. plasmid c. vector d. marker e. probe
What term describes the numerous fingerlike projections at the end of the infundibulum that extend toward the ovary?
A. Cilia B. Fimbriae C. Oviducts D. Crura