Which of the following is not involved in the step that occurs between glycolysis and the Krebs cycle?
A. Coenzyme A attaches to an acetyl group
B. decarboxylation of pyruvic acid
C. reduction of NAD
D. dehydrogenation of pyruvic acid
E. pyruvic acid accepts electrons from NADH
Answer: E
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Which of the following is an example of bulk flow during gas exchange in vertebrates?
A. movement of water past a respiratory surface B. movement of hemolymph throughout the body C. movement of oxygen from the lung into the bloodstream D. movement of carbon dioxide from body cells into the bloodstream E. All of the answer options are correct.
FtsZ, MreB, and CreS proteins regulate the shape and structure of bacterial (prokaryotes) cells. These proteins are homologous to what structure in eukaryotes?
A. extracellular matrix B. DNA processing enzymes C. cytoskeleton D. organelles E. cell wall
Plant cells called ____ make up the bulk of the soft primary growth of roots, stems, leaves, flowers,
and fruits.
a. sclerenchyma b. tracheids c. collenchyma d. parenchyma e. vessel members
Viral chromosomes exist in a variety of conformations and can be made up of ________
A) DNA only B) DNA, RNA, or protein C) protein- or lipid-coding sequences D) DNA or RNA E) RNA only