Which part of the amino acid most likely contributes to the hydrophobic behavior of this region of the polypeptide? C Methyl (CH3CH3) group Which of the following best describes the formation of the polypeptide bond? C A covalent bond is formed between a carbon atom and a nitrogen atom along with the formation of H2O Polypeptides are continuously bang formed and degraded. The amino acid in Figure 1 is found in a region of a polypeptide that folds away from water. Which of the following best explains the reactions of these enzymes? B Amylase aids in the addition of a water molecule to break covalent bonds whereas glycogen synthase aids in the removal of a water molecule to form covalent bonds. Glycogen synthase is one of the enzymes involved in converting carbohydrate monomers into polymers. Amylase is an enzyme that converts carbohydrate polymers into monomers. Which of the following best describes the hydrolysis of carbohydrates? C The addition of a water molecule breaks a covalent bond between sugar monomers. Which of the following statements about glucose, galactose, and fructose is most likely true? C The carbohydrates have different properties because they have different arrangements of carbon, hydrogen, and oxygen atoms. For each treatment group, the students calculated the mean pH and standard error, as documented in the table below. In the experiment, the students used changes in pH to monitor changes in the amount of carbon dioxide in the water. Carbon dioxide dissolved in water will lower the pH of an aqueous solution. After exposing the samples to light or dark for one hour, the students recorded the pH of the water in each beaker. Finally, the students placed an equal number of beakers containing water only in the light or dark (Figure 1: groups V and VI).

Similarly, the students transferred goldfish from the same aquarium to other beakers, and then they placed equal numbers of those beakers in the light or dark (Figure 1: groups III and IV). The students transferred aquatic plants from the aquarium to several of the beakers, and then they placed equal numbers of the beakers in the light or the dark (Figure 1: groups I and II). The students placed equal amounts of water (pH 7.0) from a large aquarium in glass beakers. Students investigated the effect of light on the carbon cycle in aquatic ecosystems by performing the controlled experiment summarized below.

Shon beaker