A randomly selected group of organisms from a family would show more genetic and anatomical
variability than a similar group randomly picked from a _____.
a. class
b. genus
c. order
d. phylum
e. kingdom
B
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Based on your understanding of metabolism, generalize when an enzyme's rate of activity can be changed
A) before enzyme production B) during enzyme production C) after enzyme production D) at any point-before, during, or after enzyme production
Which of the following statements about adhesion molecules is false?
A. Cadherins and pectins are both transmembrane proteins. B. Cadherins and integrins provide the molecular mechanisms for adhesion in animals, but not plants. C. Cadherins adhere adjacent epithelial cells to one another. D. Integrins bind epithelial cells to the extracellular matrix. E. Pectins are found in plant tissues, but not animal tissues.
Which of the following is true of eukaryotic replication initiation?
A. Origins are identified in G2 of the cell cycle. B. The prereplication complex (preRC) assembles at the beginning of S phase. C. The initiator protein, or origin recognition complex (ORC), binds to the conserved elements of the ARS in G1. D. The helicase is a component of the replication complex (RC) but not the preRC. E. The RC forms in M phase of the cell cycle.
Which organelle encloses and protects a cell's DNA?
a. peroxisome b. nucleus c. Golgi apparatus d. endoplasmic reticulum e. mitochondria