Milk is a type of protein, so cells that secrete milk likely have lots of which organelle?
a. ribosomes
b. nuclei
c. cytoskeleton
d. cytoplasm
A
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Choose all of the homeostatic variables that provide energy in animals.
_____ Water _____ Fat _____ ATP _____ Ca2+ _____ Glucose
Antigen-presenting cells include
A. macrophages. B. macrophages and B cells. C. dendritic cells and macrophages. D. dendritic cells and B cells. E. macrophages, B cells and dendritic cells.
Which provides a more stable genome, DNA or RNA?
What will be an ideal response?
Chemical equilibrium is relatively rare in living cells. An example of a reaction at chemical equilibrium in a cell would be _____
A) one in which the free energy at equilibrium is higher than the energy content at any point away from equilibrium B) one in which the entropy change in the reaction is just balanced by an opposite entropy change in the cell's surroundings C) an endergonic reaction in an active metabolic pathway where the energy for that reaction is supplied only by heat from the environment D) a chemical reaction in which both the reactants and products are not being produced or used in any active metabolic pathway at that time in the cell