Cyanide binds and impairs one of the molecules involved in the synthesis of ATP. The target organelle for cyanide must be
A. peroxisomes.
B. lysosomes.
C. ribosomes.
D. the endoplasmic reticulum.
E. mitochondria.
E. mitochondria.
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Recall the stalactite-like slime formations oozing from cave walls in the case "The First Cell: Life's Origin." The slimy bits hanging from the cave surface are secretions from the extremophile bacteria that live in this unusual environment
and are composed of water, acids, and mucous secretions. What types of chemical bonds are likely to anchor and stabilize these long, slender strands found hanging in the caves? A. nonpolar covalent bonds and hydrogen bonds B. hydrogen bonds C. hydrogen bonds and disulfide bridges D. polar covalent bonds and hydrogen bonds
In the life cycle of a zygomycete, after the zygospore is formed, the next event will be
A. dikaryon formation. B. mitosis. C. meiosis. D. plasmogamy. E. karyogamy.
Which of the following supports the finding that sugar translocation in phloem is an active (energy-requiring) process?
A) Sucrose occurs in higher concentrations in companion cells than in the mesophyll cells where it is produced. B) Movement of water occurs from xylem to phloem and back again. C) Strong pH differences exist between the cytoplasm of the companion cell and the mesophyll cell. D) ATPases are abundant in the plasma membranes of the mesophyll cells.
When implementing the scientific method, one moves from a research question to a proposed idea based on limited evidence that justifies further investigation, also known as a:
A. determining function. B. hypothesis. C. test statistic. D. p-value.