The reason that salt and sugar can be used as preservatives in pickles and jellies is that: both change the pH of a solution, denaturing enzymes and killing many bacteria all of the other answers both change the temperature of a solution, denaturing enzymes and killing many bacteria • both change the oxygen content of a solution, killing many bacteria both change the osmotic pressure of a solution, killing many bacteria

Substrate Concentration 2 ts H2O2 1 ts H2O2 1 tbs H2O2 2 tbs H2O2 ½ ts Yeast Solution 2 tbs Yeast Solution Enzyme Concentration 1 ts Yeast Solution 1 tbs Solution Yeast Temperature 2 tbs Ice Water 1 tbs Ice Water Room 1 ts Hot Water 2 tbs Hot Water Temperature pH Acid Distilled Water Base | 2 Base 2 tbs Solution Acid ts 1 ts tbs Solution Solution Solution Multiple Choice 16. What should be observed in the experiment? a. Amount of bubbles/ effervescence released c. Length of effervescence formation b. Time when test substance was added until a reaction occurs d. All of the choices 17. What does the effervescence represent? a. Carbon dioxide was released b. A reaction took place b. Enzymes are limited by many factors 18. What amount of substrate concentration produced the greatest amount of effervescence? a. ½ ts H2O2 19. Which of the following had the longest time for effervescence to stop forming? a. ½ ts H2O2 20. The solution that showed the shortest time of forming bubbles is: a. ½…

The primary concern with using bleached paper products for food is: O lead O dioxin O methylmercury O pesticides O microorganisms

The pH of a solution is 7, what is the H+ concentration?   Group of answer choices   1 x 10e-7 M 1 x 10e-3 M 1 x 10e-8 M 1 x 10e-9 M

1 Complete the following paragraph to describe the difference between heterotrophs and autotrophs. Responses may be used more than once. solar heterotrophs autotrophs carbon dioxide water glucose photosynthesis Organisms that produce their own food are called process that some organisms use to make this food is called This process converts energy, into a carbohydrate called 2 and The products of this reaction are consumed by organisms called These organisms transform the energy found in gas to usable energy, releasing One gas, and that must take in pre-formed organic molecules for energy and gas and

1. What chemical is causing the initial absorbance in the spectrophotometer (enzyme assay for determination of glucose and fructose concentrations), before any enzymes are added? Pick the best choice.    NADP+,  Beverage sample, ADP, NADPH, Imidazole buffer, Fructose, G6P dehydrogenase, Water, Hexokinase, Glucose, ATP, Phosphoglucoisomerase 2. After the enzymes have been added and the reaction has occurred, what chemical is being measured in the spectrophotometer (enzyme assay for determination of glucose and fructose concentrations)? Pick the best choice.   NADP+,  Beverage sample, ADP, NADPH, Imidazole buffer, Fructose, G6P dehydrogenase, Water, Hexokinase, Glucose, ATP, Phosphoglucoisomerase

*9. B-carotene is a pigment that is largely responsible for the color of carrots. In addition to carrots and various green and yellow vegetables, it can also be found in other sources such as liver and egg yolk. Persons who do not have adequate B-carotene in their diet may suffer from rickets night blindness scurvy @sterility

The reactive sites of FAD are: O2 N atoms O 2 C atoms O 1 N atom O 2 C atoms

1. A peer-reviewed scientific journal articles. is usually based on either past experiences or information gained from reading 2. variables are kept the same to maintain consistent testing conditions across all experimental samples. 3. provides a quick, albeit inaccurate, means of obtaining the pH of a solution. 4. Substances whose pH values are above 7.00 are considered ; substances whose pH values are below 7.00 are considered 5. During a reaction, molecule B receives an electron(s) from molecule A, leaving molecule A oxidized. 6. The reagent is used to detect the presence of complex sugars (ex. starch) in solutions. 7. Reducing sugars, such as glucose, will always react with Benedict's reagent because these sugars have a(n) functional group. 8. are molecules which donate protons (H+) in solution very easily.

Foods preserved by Irradiation:     are sterilized by high energy particles from radioactive materials     cause ulcerative colitis in the human large intestine     have a distinctive green color        are radioactive     may be stored indefinitely at room temperature until the packaged is opened