For glycolysis to begin, ____.
A. glucose must enter the mitochondria
B. there must be an input of energy from ATP
C. oxygen must be available
D. some hydrogen acceptors must be available
E. there must be an input of energy from ADP
Answer: B
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Agrobacterium infects plants and causes them to form tumors. You are asked to determine how long a plant must be exposed to these bacteria to become infected. Which of the following experiments will provide the best data to address that question?
A) Determine the survival rate of Agrobacterium when exposed to different concentrations of an antibiotic. B) Measure the number of tumors formed on a plant when exposed to various concentrations of Agrobacterium. C) Measure the concentration of Agrobacterium in different soil environments where the plants grow. D) Measure the number of tumors formed on plants, which are exposed to Agrobacterium for different lengths of time.
Bacterial cultures with a large number of genetically identical cells are called:
a. clone cultures. b. equal cultures. c. simple cultures. d. identical cultures. e. fresh cultures.
Implantation of an embryo normally has occurred by how long after fertilization?
A. 3 days B. 6 days C. 12 days D. 20 days E. 1 month
The head of a sperm is covered by the ________, which contains enzymes that help penetrate the layers of cells surrounding the egg
Fill in the blank(s) with correct word