Free Cell Structure and Function MCQs with Answers
2,478 Cell Structure and Function MCQs from Biology, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Animal, plant, prokaryotic and eukaryotic cells are compared through their membranes, cell walls, nuclei and cytoplasmic organelles. The work includes the structures and functions of mitochondria, chloroplasts, ribosomes, endoplasmic reticulum, Golgi apparatus and lysosomes, as well as chromosome organization and the distinction between chromatin and chromosomes.
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Read the Cell Structure and Function notesFree MDCAT chapter notes with key terms2,478 questions · page 45 of 124
- A. Lysozymes
- B. Lysosomes
- C. Mitochondria
- D. Nucleus
Explanation: Macrophages are phagocytes and need to carry out intracellular digestion, which is the function of lysosomes.
Correct answer: Lysosomes- A. 1:1
- B. 2:1
- C. 1:2
- D. 1:3
Explanation: Eukaryotic ribosomes are composed of almost equal amounts of RNA (ribonucleic acid) and protein; hence they are ribonucleoprotein…
Correct answer: 1:1- A. It contains F1 particles.
- B. It is involved in cellular respiration.
- C. It is a self replicating organelle.
- D. Number of mitochondria is constant
Explanation: Number of mitochondria is not constant. The size and number of mitochondria vary and depend on the physiological activity of the cell.
Correct answer: Number of mitochondria is constant- A. Parasitic activity
- B. Presence of food vacuoles
- C. Hydrolytic or phagocytic activity
- D. Catalytic activity
Explanation: Lysosomes are the organelles present abundantly in animal cells and exhibit phagocytic activity.
Correct answer: Hydrolytic or phagocytic activity- A. Fungal cells
- B. Prokaryotic cells
- C. All eukaryotic cells
- D. None of the above
Explanation: The phragmoplast is the structure that builds a cell wall (called a "cell plate") between daughter cells.
Correct answer: None of the above- A. Tubulin
- B. Actin
- C. Myosin
- D. Chitin
Explanation: Microfilaments are thin molecules that are composed majorly of actin protein subunits. These polymerize to form elongated filaments.
Correct answer: Actin- A. Thylakoid
- B. F1 particles
- C. Granum
- D. Centrosome
Explanation: Chloroplasts are split into 3 parts, the envelope, stroma and thylakoid.
Correct answer: Thylakoid- A. Digesting food
- B. Storage of energy
- C. Protein packaging
- D. Moving cytoplasm
Explanation: The lysosome is a membrane-bound cell organelle that contains digestive enzymes.
Correct answer: Digesting food- A. Chloroplast
- B. Chlorophyll
- C. Chromoplast
- D. Leucoplast
Explanation: Chromoplasts are plastids, heterogeneous organelles responsible for pigment synthesis (storage and synthesis of carotenoid pigments in…
Correct answer: Chromoplast- A. No membranous boundary
- B. Hereditary center
- C. Site of synthesis for rRNA
- D. Composed of two regions
Explanation: Nucleus is called the hereditary centre.
Correct answer: Hereditary center- A. Structurally and functionally different
- B. Structurally different but functionally similar
- C. Structurally and functionally similar
- D. Structurally similar but functionally different
Explanation: Mitochondria is the double membrane bounded organelle found in eukaryotes.It is the power house of cell.
Correct answer: Structurally and functionally different- A. Endocytosis
- B. Phagocytosis
- C. Exocytosis
- D. Pinocytosis
Explanation: Option C is correct exocytosis here can be referred to as secretion ( material moving out of cell ) all other options signal towards…
Correct answer: Exocytosis- A. Active diffusion
- B. Facilitated diffusion
- C. Passive diffusion
- D. Random diffusion
Explanation: Passive diffusion is the type of diffusion which takes place down the concentration gradient and there's no need of any Channel protein.
Correct answer: Passive diffusion- A. 4
- B. 10
- C. 40
- D. 400
Explanation: Total magnification= Magnification of eye piece x Magnification of objective 40= 10 x y 40/10= y y= 4 Answer
Correct answer: 4- A. Lysosomes
- B. ER
- C. Golgi
- D. Mitochondria
Explanation: Option A is correct as apoptosis is the process by which a cell dies, and "lysosomes" are organelles with special enzymes that break down…
Correct answer: Lysosomes896. This jelly like substance inside the plasma membrane in which all cell organelles are floating is?
- A. Cytoplasm
- B. Tonoplasm
- C. Karyoplasm
- D. Cell sap
Explanation: Option A is correct as the fluid in which all organelles are suspended in a cell is called the "cytoplasm".
Correct answer: Cytoplasm- A. Nucleus
- B. Cell membrane
- C. Cytoplasm
- D. Cell vacuole
Explanation: Option D is correct as plant cells usually have only one ore two large "vacoules" in the centre.
Correct answer: Cell vacuole- A. Cholestrol molecule
- B. Amino Acid
- C. Protein
- D. Phospholipid
Explanation: Transverse diffusion or flip-flop involves the movement of lipid or protein from one membrane surface to the other .
Correct answer: Phospholipid- A. Cilia
- B. Membrane bound organelles
- C. Plasma membrane
- D. Ribosomes
Explanation: Option B is correct since eukaryotic cells always possess organelles that are membrane-bound.
Correct answer: Membrane bound organelles- A. Cellulose
- B. Hemicellulose
- C. Middle Lamella
- D. All of the above
Explanation: Option C is correct since the middle lamella is the layer of material between adjacent plant cells.
Correct answer: Middle Lamella