The activation energy of a reaction refers to the
minimum amount of energy
a. released by the reaction.
b. in the reactants.
c. in the products.
d. necessary to cause a reaction to proceed on
its own.
e. difference between the energy of the
reactants and the energy of the products
D
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Pinocytosis and phagocytosis are accomplished in the cell by the ____
a. nucleus b. lysosome c. endoplasmic reticulum d. plasma membrane e. mitochondria
Clumped dispersion is often influenced by:
a. the presence of strange groups. b. sexual reproduction in plants or invertebrates. c. unlimited seed dispersal in plants. d. a patchy distribution of resources. e. homogenous environments
During which of the following stages of meiosis is the cell haploid?
A. prophase I B. anaphase II C. metaphase I D. anaphase I
Answer the following questions true (T) or false (F)
1. All other levels of protein structure are dictated by the primary structure. 2. A nucleotide is a polymer of nucleic acids. 3. Every form of life is either a single cell or is composed of cells.