Question

Chapter 4: A Tour of the Cell 5. Smooth endoplasmic reticulum (SER) lacks _, which gives it a "smooth" appearance. 6. True or false: If false, make it a correct statement. The smooth endoplasmic reticulum con- tains many enzymes that allow it perform functions like detoxify circulating drugs. 7. Use Figures 4.14 (page 65 of your textbook) and 4.17 (page 67 of your textbook) to answer the following question. Place the following steps in the order in which they occur A---Proteins are modified as they pass through the Golgi apparatus B-A vesicle from the rough ER fuses with the Golgi membrane C-A vesicle buds off from a Golgi stack D-A vesicle containing a secretory protein fuses with the cell's plasma membrane 8. How are lysosomes different from vacuoles? Chapter Content: Chloroplasts and Mitochondria: Providing Cellular Energy Complete the following questions as you read the fourth chapter content-Chloroplasts and Mito- chondria: Providing Cellular Energy 1. True or false: An animal cell will contain chloroplasts and mitochondria. If false, correct the statement. 2. The process of photosynthesis occurs primarily in a plant's leaves. Based on this information, which of the following organelles would you expect to be present in the cells of plant leaves? A) Ribosomes B) Chloroplasts C) The nucleus D) Mitochondria

Answer 1

Answer to first question: Ribosomes

SER is smooth because it lacks ribosomes on its surface.

Answer to the second question: True

One of the most important function of SER is detoxification,that is removal of toxic material as well as metabolic wastes or drugs .The detoxification process is done by SER present in the liver.It contain enzymes that catalyse a number of reactions that can make lipid soluble drugs and metabolic wastes into water soluble,so that these can be easily be expelled out of the body.

Answer to the third question:

• A vesicle from rough ER fuses with golgi membrane
• A vesicle bud off from a golgi stack
• proteins are modified as they pass through golgi apparatus
• A vesicle containing a secretory protein fuses with the cell's plasma membrane

Answer to the fourth question: difference between lysosomes and vacuoles

• Lysosome is a membrane bound organelle designed for the functions of digestion and phagocytosis.It contains a number of digestive enzymes.Vacuole is another type of cell organe;lle containing water ,pigments,excretory substances etc.
• Lysosomes are derived from golgi bodies whereas vacuoles are not derived from golgi bodies.
• Lysosomes are present in large numbers .Vacuoles are few in numbers in animal cell whereas in plants a single large vacuole is found.
• Lysosomes are not found in bacterial cells but vacuoles are found in bacterial cells.

Answer to fifth question: False

Animal cells contains mitochondria.Chloroplasts are found in plant cells.

Answer to sixth question: Photosynthesis takes place in the chloroplast of the plant cell.

Option B is the correct answer.