Another environmental change that can affect enzyme activity is a change in pH. Design an experiment that could be used to test for the effects of changing pH on enzyme activity. **don't make it too long, just a few short sentences** ty

Which of the following is not true about enzymes? a. They are consumed by the reactions they catalyze. b. They are usually made of amino acids. c. They lower the activation energy of chemical reactions. d. Each one is specific to the particular substrate(s) to which it binds.

Figure 4.5 Energy inputs and outputs in chemical reactions. 1 Some reactions convert molecules with lower energy to molecules with higher energy, so they require a net energy input in order to proceed. 2 Other reactions convert molecules with higher energy to molecules with lower energy, so they end with an energy release Figure It Out: Which law of thermodynamics explains energy inputs and outputs in chemical reactions?

Which of the following statements is not true? Metabolic pathways _____. a. occur in a stepwise series of chemical reactions b. are speeded up by enzymes c. may break down or assemble molecules d. always produce energy (such as ATP)

Energy is stored long-term in the bonds of _____ and used short-term to perform work from a(n)_____molecule. a. ATP : glucose b. an anabolic molecule : catabolic molecule c. glucose: ATP d. a catabolic molecule : anabolic molecule

The energy currency used by cells is _____. a. ATP b. ADP c. AMP d. adenosine

A salt does not release __________ in water. a. ions b. energy c. H+

Figure 2.12 A pH scale. Here, red dots signify hydrogen ions (H+) and blue dots signify hydroxyl ions (OH). Also shown are the approximate pH values for some common solutions. This pH scale ranges from 0 (most acidic) to 14 (most basic). A change of one unit on the scale corresponds to a tenfold change in the amount of H+ ions. Photos, JupiterImages Corporation. Figure It Out: What is the approximate pH of cola?

Explain why water is an excellent solvent.