The primary function of the large intestine is to ____
a. absorb water
b. absorb nutrients
c. complete the digestion of carbohydrates
d. complete the digestion of fats
e. complete the digestion of protein
ANSWER: a
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Which of the following traits do ammonia and nitrite oxidizers share?
A) chemoorganotrophic B) autotrophic C) aerobic D) autotrophic and aerobic
Extremely halophilic Archaea often form ________ in order to access ________
A) stalks / nutrients B) intracellular inclusions / elemental sulfur C) gas vesicles / oxygen D) intracellular membranes / sunlight
Who am I? I have the same photosynthetic pigments as plants, but I can also obtain nutrients by
ingestion. a. plasmodium b. Amoeba c. euglenoids d. Giardia e. Paramecium
One way in which an enzyme can lower the activation energy required for a reaction is to bind the substrate(s) and distort its structure so that the substrate more closely resembles the transition state of the reaction
This mechanism will be facilitated if the shape and chemical properties of the enzyme's active site are more complementary to the transition state than to the undistorted substrate; in other words, if the enzyme were to have a higher affinity for the transition state than for the substrate. Knowing this, your friend looked in an organic chemistry textbook to identify a stable chemical that closely resembles the transition state of a reaction that converts X into Y. She generated an antibody against this transition-state analog and mixed the antibody with chemical X. What do you think might happen?