PLZZ HELP IF YOU HELP I WILL GIVE U BRAINLIEST 1. Which of the following is a function of the pancreas?
A. It produces bile.
B. It produces digestive enzymes.
C. It absorbs food.
D. It digests foods.

2. Where does the process of chemical digestion begin?
A. stomach
B. esophagus
C. small intestine
D. mouth

3. Through which structure do wastes pass into the rectum?
A. duodenum
B. large intestine
C. small intestine
D. villi

4. Water is extracted from the digested food in the body primarily by the:
A. gallbladder.
B. duodenum.
C. large intestine.
D. small intestine.

5. Proteins are made of monomers called:
A. lipids.
B. unsaturated fats.
C. amino acids.
D. fatty acids.

6. What passage carries food from the pharynx to the stomach?
A. small intestine
B. epiglottis
C. esophagus
D. large intestine

7. What enzyme found in saliva breaks chemical bonds between the sugar monomers in starch?
A. amylase
B. chyme
C. pepsin
D. hydrochloric acid

8. The stomach breaks down food into soft, partially digested food called:
A. pepsin.
B. chyme.
C. bolus.
D. bile.

9. A monosaccharide is a:
A. carbohydrate.
B. lipid.
C. nucleic acid.
D. protein.

10. Which statement is true?
A. Simple sugars are made of polysaccharides.
B. Glycerol is made of fatty acids.
C. RNA molecules are made of nucleotides.
D. Amino acids are made of proteins.

11. Enzymes affect the reactions in living cells by changing the:
A. products of the reaction.
B. speed of the reaction.
C. temperature of the reaction.
D. pH of the reaction.

12.Which of the following organic compounds is the main source of energy for living things?
A. carbohydrates
B. lipids
C. nucleic acids
D. proteins

13. Which of the following is NOT a function of proteins?
A. control of heredity
B. fighting disease
C. control rate of reactions
D. formation of bones and muscles

14. A substance that speeds up a reaction, but is not consumed in the reaction is a:
A. catalyst.
B. lipid.
C. substrate.
D. product.

15. The teeth are extremely important in:
A. chemical digestion.
B. mechanical digestion.
C. condensation reactions.
D. osmosis.

16. Gastric glands produce:
A. mucus.
B. hydrochloric acid
C. pepsin.
D. All of these choices are correct.

17. Acid reflux is caused by:
A. over stimulation of the gastric lining.
B. damage of the stomach's mucous lining.
C. failure of the lower esophageal valve.
D. failure of the pyloric valve.

18. Peptic ulcers are caused by:
A. over stimulation of the gastric lining.
B. damage of the stomach's mucous lining.
C. failure of the lower esophageal valve.
D. failure of the pyloric valve.

19. Which of the following increases the surface area of the small intestine?
A. microvilli
B. villi
C. folds in the intestinal lining
D. All of these choices are correct.

20. Which of the following does NOT affect enzyme activity?
A. pH
B. bile
C. temperature
D. ion concentration