Unit 1 Biochemistry, properties of water, and enzyme review

1. Which of these work together to break down something?

a. Sugar and glucose b. Amino acid and Protein

c. Fats and Lipids d. Enzymes and substrates

2. Which of these substances with the following pH is more acidic?

a. Substance A – pH 2b. Substance B -pH 8c. Substance C – pH 5d. Substance D – pH 4

3. Your saliva measures 7 on the pH scale, it is a(n) ___ solution?

a) acidic

b) . basic

c) . neutral

4.The ___ property of water helps in the formation of soil.

• a. capillary action • b. expansion during freezing • c. evaporative cooling

5. Laundry detergent typically has a pH of 3 which indicates a(n) ___ solution?

• a. acidic • b. basic • c. neutral

6. The ___ property of water removes heat helping to cool your skin through sweating.

• a. capillary action • b. evaporation • c. cohesion

7. One of the properties of water is that it is polar. Why do you consider water polar?

a. It is clear.b. It is transparent.c. It has charges (positive and negative charges)d. IDK

8. One of the properties of water is that it has surface tension. Why is this true?

a. Water is polar.b. Water has cohesive and adhesive properties.c. Water has capillary action.d. IDK

9. Which macro molecule stores the genetic material?

a) Proteinb) Carbohydratec) IDKd) Nucleic acids

10. All organic compounds contain which element?

• a. calcium • b. carbon • c. chlorine

11. Is water an organic compound?

• a. yes • b. no • c. sometimes it is and sometimes not

12. Which macromolecule is made up of amino acids?

• a. carbohydrates • b. lipids • c. proteins

13. Starches & sugars are both examples of which macromolecules?

• a. carbohydrates • b. lipids • c. proteins

14. Fats & oils are both examples of which macromolecule?

• a. carbohydrates • b. lipids • c. proteins

15. What does carbohydrate and fats have in common?

a) They are both sources of energy.b) They are both from the same food.c) They are readily available.d) IDK

16. Which of the following macro molecules make up your skin, hair and nail?

a) Carbohydrateb) Fats and Lipidsc) Proteinsd) IDK

17. Which of these foods will give you abundant energy to perform well during a cross country race?

a) Vegetable and broccolib) Tea and Candy barsc) Spaghetti and Juiced) IDK

18. One of these is not among the four major elements found in our human body are?

a) Carbonb) Oxygenc) Hydrogend) Calcium

19. Which of these macro molecules help animals to retain or conserve heat?

a) Lipidsb) Proteinc) Carbohydrated) IDK

20. Which these molecules help in building up tissues?

a) Lipidsb) Protein c) Carbohydrated) IDK

21. Match the following macro molecules with their functions?

• Carbohydrate a. Build tissues

• Protein b. Slow Source of energy

• Lipids (Fats and Oil). C. genetic information

• Nucleic Acid d. Quick source of energy

22. An enzyme speeds up a chemical reaction and can therefore be called?

a) catalystb) proteinc) Iond) atom

23. Which of these factors affect enzyme reactions?

a) Heat and temperature.b) Salt and sugarc) Protein and carbohydrated) IDK

24. Enzymes are specific because?

a) Each has a specific active site for a particular substance.

b) They can change shape and size during a reaction.

c) They speed chemical reaction.d) IDK

25. Enzymes are a form of ___.

a) a. carbohydrate b) b. lipid c) c. proteind) IDK

26. Enzymes can speed up a reaction, so they are called ___.

• a. catalysts • b. reactants • c. inhibitors

27. The area where the enzyme attaches to the substrate is called the ___.

• a. active site • b. cohesion area • c. vectors

28. Enzymes work because they lower the -

a. chemical reactant rate b. active site locationc. activation energy

Answer key1. d2. A3. C4. B5. A6. B7. C8. B9. D10. B11. B12. C13. A14. b

15. A16. C17. C18. D19. A20. B21. carb-d, protein-a, lipid-b, nucleic acid-c22. A23. A24. A25. C26. A27. A28. c