This diagram illustrates the action of a proteasome on protein marked with ubiquitin tags. What statement about this process is true?
a. Degradation of proteins results in the destruction of the proteasome.
b. Degradation of proteins in proteasomes produces a net output of energy.
c. Degradation of proteins in proteasomes requires a net input of energy.
d. Proteasomes absorb all non-amino acid components of proteins.
c. Degradation of proteins in proteasomes requires a net input of energy.
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One factor that seems to aid in maintaining lipid stability in hyperthermophilic Archaea is that dibiphytanyl tetraether lipids form a(n)
A) covalently bonded monolayer cytoplasmic membrane. B) interlocking bilayer cytoplasmic membrane. C) interlocking lattice with the cell wall. D) pseudomembrane immediately inside the cytoplasmic membrane.
Multiple independent experiments have demonstrated that phytochrome helps trigger seasonal change responses in the plant such as changing color and loosening of leaves. Plants have the ability adapt to seasonal changes in their surroundings. This statement is an example of:
A. a hypothesis B. deductive reasoning C. a theory D. an experiment E. inductive reasoning
When an arborist prunes a limb off a valuable tree, he or she may paint the cut surface. The primary purpose of the paint is to _____
A) minimize water loss by evaporation from the cut surface B) improve the appearance of the cut surface C) stimulate growth of the cork cambium to "heal" the wound D) block entry of pathogens through the wound
Erythema infectiosum is a dangerous but treatable disease.
Answer the following statement true (T) or false (F)