Irvine Valley College

BIO 1

Quiz #5: Enzymes and Cell structures

1)Which of the following does not attach to an enzymes active site?

1. Reactants
2. Competitive inhibitors
3. Noncompetitive inhibitors
4. Substrate

2. Enzymes are a kind of

1. lipid
2. protein
3. carbohydrate
4. DNA

3. The membranes of all types of cells is comprised of phospholipid.

1. True
2. False

4. Which of the following is true only for prokaryotic cells?

1. They lack DNA
2. They lack cell membranes
3. They possess rotating flagella
4. They have a peptidoglycan cell wall

5. The key distinction of eukaryotic cells is that

1. They are smaller than other types of cells
2. They are compartmentalized
3. They possess DNA
4. They possess ribosomes

6. Ribosomes

1. Package cell products
2. Produce lipids
3. Form cell membranes
4. Synthesis proteins

7. Which of the following organelles synthesis lipids?

1. Smooth ER
2. Rough ER
3. Golgi apparatus
4. mitochondria

8. Which of the following is found in plant cells but not animal cells?

1. DNA
2. mitochondria
3. Central vacuole
4. Both B and C

9. Enzymes act to reduce the energy of activation for a chemical reaction

1. True