Which organisms are responsible for the majority of photosynthesis?
A) Cyanobacteria
B) Flowering plants
C) Phytoplankton
D) Conifers
E) Ferns
C
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An enzyme reduces the free energy of which of the following?
A) substrate B) product C) transition state D) cofactor E) intermediate product
The source of most mitochondrial DNA an organism inherits is ________
A) the nucleus of the sperm B) the nucleus of the egg C) the cytoplasm of the sperm D) the cytoplasm of the egg E) None of these choices
Which structure in the bird's digestive tract is utilized for food storage?
a. the esophagus b. the crop c. the mouth d. the gizzard
What is a ribozyme?
A. an RNA with enzymatic activity B. an enzyme that synthesizes RNA primers during DNA replication C. an enzyme that uses RNA as a substrate D. an enzyme that catalyzes the association between the large and small ribosomal subunits E. an enzyme that synthesizes RNA as part of the transcription process