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 38 of 124
- A. Unit membrane
- B. Fluid mosaic
- C. Permeable
- D. Ultracentrifuge
Explanation: Fluid mosaic model of the plasma membrane described the arrangement of phospholipids two layers, stabilized interiorly by the hydrophobic…
Correct answer: Fluid mosaic- A. 9
- B. 27
- C. 3
- D. 12
Explanation: Most centrioles are made up of triplet of nine microtubules. Hence centrioles have (9*3) 27 microtubules.
Correct answer: 27- A. Phagocytosis
- B. Endocytosis
- C. Pinocytosis
- D. Exocytosis
Explanation: The ingestion of liquid material into a cell by the budding of small vesicles from the cell membrane is called pinocytosis while the…
Correct answer: Pinocytosis- A. Mitochondria
- B. Centrioles
- C. Ribosomes
- D. Lysosomes
Explanation: Spindle fibers are made up of microtubules. There are two centrioles in the non-dividing stage of a cell.
Correct answer: Centrioles- A. Outer membrane
- B. Outer compartment
- C. Inner membrane
- D. Inner compartment
Explanation: Mitochondria is a double membrane bound cell organelle. The inner membrane have folding known as cristae which are studded with large…
Correct answer: Inner membrane- A. Ten
- B. Eight
- C. Nine
- D. Seven
Explanation: Each centriole is made of nine microtubule triplets (9x3 = 27).
Correct answer: Nine747. Fluid mosaic model of plasma membrane states that protein molecules float in a fluid-like _ layer.
- A. Galactose
- B. Glucose
- C. Phospholipids
- D. Carbohydrate
Explanation: Fluid mosaic model of the plasma membrane described the arrangement of phospholipids in two layers, stabilized interiorly by the…
Correct answer: Phospholipids- A. Passive Diffusion
- B. Active Transport
- C. Endocytosis
- D. Facilitated Diffusion
Explanation: Facilitated diffusion also known as facilitated transport or passive-mediated transport, is the process of spontaneous passive transport…
Correct answer: Facilitated Diffusion- A. Ribosomes
- B. Mitochondria
- C. Polysomes
- D. Golgi bodies
Explanation: Mesosomes are membrane infoldings in bacterial cells and are more prominent in Gram negative bacteria.
Correct answer: Mitochondria- A. Single, circular, double stranded molecule not bound by membrane
- B. Double circular molecule
- C. Linear, double stranded molecule
- D. Single, circular, double stranded and membrane bound
Explanation: Genomic DNA molecules in prokaryotes are single circular, double stranded and not bounded by any membrane and it is freely dispersed in…
Correct answer: Single, circular, double stranded molecule not bound by membrane- A. Golgi body
- B. Mitochondria
- C. Ribosome
- D. Plastid
Explanation: A ribosome is made up of two sub-units, larger and smaller subunits. In case of eukaryotic cells, larger subunit is 60s and smaller…
Correct answer: Ribosome- A. Phagocytosis
- B. Pinocytosis
- C. Autophagy
- D. Exocytosis
Explanation: Autophagy is the natural, regulated mechanism of the cell that removes unnecessary or dysfunctional components.
Correct answer: Autophagy- A. Magnification
- B. Fractionation
- C. Centrifugation
- D. Resolution
Explanation: Resolution is the shortest distance between two points that a user can still see as separate images under the microscope
Correct answer: Resolution- A. 250 um
- B. 50 um
- C. 750 um
- D. 500 um
Explanation: To calculate the total magnification of an object observed under a microscope, you need to multiply the magnification of the eyepiece…
Correct answer: 750 um- A. Biconcave
- B. Convex
- C. Spherical
- D. Concave
Explanation: The shape of maturing phase of the golgi apparatus is concave or the inner concave.
Correct answer: Concave- A. Lock and key model
- B. Induced fit model
- C. Fluid mosaic model
- D. Lotka volterra model
- E. All of these
Explanation: As per the fluid mosaic model cell membranes have proteins as icebergs in a sea of lipids (lipid). Hence option C is correct.
Correct answer: Fluid mosaic model- A. Organelles
- B. Tissues
- C. A system
- D. Both A and B
Explanation: The group of cells that perform the same function is called tissue (OPTION B).
Correct answer: Tissues- A. Primary cell wall
- B. Secondary cell wall
- C. Middle lamella
- D. Tertiary cell wall
Explanation: The plant cell is surrounded by cellulosic cell walls. The cell walls of two adjacent cells are separated by middle lamella which…
Correct answer: Middle lamella- A. Suicide Sacs
- B. Chondriosome
- C. Storage organelle
- D. Dicytosome
- E. Power house of a cell
Explanation: Lysosomes are sphere-shaped sacs filled with hydrolytic enzymes that have the capability to break down many types of biomolecules.
Correct answer: Suicide Sacs- A. Nucleus
- B. Mitochondrion
- C. Endoplasmic reticulum
- D. Plastids
- E. Cytoskeletons
Explanation: Aerobic respiration consists of glycolysis, Calvin cycle, Kreb's cycle, and oxidative phosphorylation.
Correct answer: Mitochondrion