Question

which organelle controls what comes in and out of the cell and can be found in all cell types?
○ a cell wall
○ b cell membrane
○ c vacuole
○ d nucleus

question 39 (1 point)
payten knows that the only way that she will ever have a chance of becoming the flag football team captain is if she is extremely strong. for this reason, she does many squats, lunges, and sprints as part of her training. which two organelles would be in great abundance in her leg muscles?
○ a rough er and ribosomes
○ b nucleus and cytoplasm
○ c vacuoles and vesicles
○ d mitochondria and lysosomes

Explanation:

First Question (Which organelle controls...):

• Option a: Cell wall is present in plant, fungal, and bacterial cells but not all cell types (e.g., animal cells lack it) and it provides structure, not main control of entry/exit.
• Option b: Cell membrane (plasma membrane) is present in all cell types (prokaryotic and eukaryotic) and regulates the movement of substances in and out of the cell.
• Option c: Vacuole is mainly for storage (larger in plant cells, smaller in animal cells) and not universal in all cell types or for controlling entry/exit.
• Option d: Nucleus contains genetic material and controls cell activities but not the movement of substances in/out of the cell.

• Option a: Rough ER and ribosomes are involved in protein synthesis. Muscle cells need proteins (like actin, myosin) for contraction, so more protein synthesis organelles (rough ER has ribosomes) would be abundant in muscle cells due to training.
• Option b: Nucleus and cytoplasm are general cell components, not specifically abundant due to muscle - strengthening training.
• Option c: Vacuoles and vesicles are for storage/transport, not directly related to muscle strength (which needs energy and protein synthesis).
• Option d: Lysosomes are for digestion/breakdown, not related to muscle strength enhancement from training.

Answer:

b. cell membrane

Second Question (Payten's leg muscles...):