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Questions and Answers
What is the primary function of the cell membrane?
What is the primary function of the cell membrane?
- Provides structural support to the cell
- Stores energy in the form of glycogen
- Controls the movement of substances into and out of the cell (correct)
- Conducts photosynthesis in plant cells
Which organelle is responsible for respiration and energy release?
Which organelle is responsible for respiration and energy release?
- Ribosome
- Mitochondrion (correct)
- Vacuole
- Chloroplast
What is the function of the cell wall in plant cells?
What is the function of the cell wall in plant cells?
- Facilitates cellular respiration
- Stores genetic information
- Regulates the entry of nutrients
- Provides shape and support (correct)
What distinguishes the vacuole in mature plant cells compared to vacuoles in animal cells?
What distinguishes the vacuole in mature plant cells compared to vacuoles in animal cells?
Which cellular structure is primarily involved in photosynthesis?
Which cellular structure is primarily involved in photosynthesis?
Which organelle is often abundant in active cells like liver cells?
Which organelle is often abundant in active cells like liver cells?
In which type of cells are chloroplasts found?
In which type of cells are chloroplasts found?
What is contained within the large central vacuole of a mature plant cell?
What is contained within the large central vacuole of a mature plant cell?
Which of the following statements about ribosomes is true?
Which of the following statements about ribosomes is true?
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Study Notes
Cell Membrane
- Forms a boundary between the cell's interior and its environment.
- Regulates movement of substances in and out of the cell.
Cytoplasm
- Site of all cellular activities.
- Contains organelles like mitochondria and ribosomes, as well as food reserves (glycogen, starch, oil droplets).
- Appears granular in structure.
Mitochondrion
- Organelle where respiration occurs, providing energy for cellular functions.
- Active cells, such as liver cells, have numerous mitochondria.
- Structure is typically not clearly visible under light microscopy.
Cell Wall
- Nonliving layer external to the cell membrane in plant cells.
- Permits free passage of liquids and dissolved substances.
- Provides shape and structural support to plant cells.
- Absent in animal cells.
Vacuole
- Mature plant cells contain a large central vacuole filled with cell sap (dilute solution of salts and sugars).
- May also contain pigments.
- Animal cells may have small, temporary vacuoles.
Chloroplast
- Organelle that contains the green pigment chlorophyll found in plant cells.
- Abundant in palisade cells of leaves, where photosynthesis takes place.
- Not present in animal cells.
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