In an enzyme-catalyzed reaction, the reactant is called the
A. catalyst
B. coenzyme
C. substrate
D. product
Answer: C
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Which of the following enzymes relieves the strain in DNA introduced by unwinding in E. coli?
A. gyrase B. ligase C. primase D. helicase E. SSB
Which of the following is not correct concerning epistatic interactions?
A. They can be associated with enzymatic pathways. B. They produce variations in the expected 9:3:3:1 ratio of a dihybrid cross. C. They can result when a gene at one locus masks the expression of a gene at a different locus. D. They always result in a 9:7 ratio of a dihybrid cross. E. They are due to gene interactions.
Barnacles belong to which of the following groups of invertebrates?
a. crustaceans b. mollusks c. annelids d. chelicerates e. brachiopods
________ is the hormone released by the pancreas to lower levels of glucose in the blood.
Fill in the blank(s) with the appropriate word(s).