Question

question 4
1 pts
the enzyme catalase is an important chemical in the functioning of the:
mitochondria.
proteasomes.
peroxisomes.
lysosomes.
question 5
1 pts
which of the following is not true of the rough endoplasmic reticulum?
it makes lipids and carbohydrates.
it is made of broad, flattened sacs.
it has many ribosomes attached to it.
all of the above are true of rough endoplasmic reticulum.
question 6
1 pts
main cell structures include all of the following except:
organelles.
plasma membrane.
interstitial fluid.
cytoplasm.

Explanation:

• Question 4: Catalase is an enzyme that breaks down hydrogen - peroxide. Peroxisomes are organelles that contain catalase to perform this function. Mitochondria are involved in energy production, proteasomes in protein degradation, and lysosomes in breaking down waste materials and cellular debris.
• Question 5: The rough endoplasmic reticulum (RER) is made of broad, flattened sacs (cisternae) and has ribosomes attached to its surface. It is mainly involved in protein synthesis and modification, not in making lipids and carbohydrates (that is more the function of the smooth endoplasmic reticulum).
• Question 6: Organelles, plasma membrane, and cytoplasm are main cell structures. Interstitial fluid is the fluid that surrounds cells in tissues, not a part of the cell's internal structure.

Answer:

• Question 4: C. peroxisomes
• Question 5: A. It makes lipids and carbohydrates.
• Question 6: C. interstitial fluid