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 116 of 124
- A. Metaphase
- B. Anaphase
- C. Telophase
- D. Cytokinesis
Explanation: Phragmoplast is formed during cytokinesis. This complex assembly of microtubules, actin filaments and associated molecules act as a…
Correct answer: Cytokinesis- A. Controlling active transport
- B. Acting as a membrane blood receptor
- C. Helping cells join together
- D. Regulating the flexibility at the membrane
Explanation: Cholesterol helps to regulate membrane fluidity over the range of physiological temperatures.
Correct answer: Regulating the flexibility at the membrane2303. Which is the most likely route for carbon dioxide molecules to pass through the cell membrane?
- A. Protein channels
- B. Active transport
- C. Endocytosis
- D. Diffusion
- E. Facilitated diffusion
Explanation: Explanation for this question will be added soon.
Correct answer: Diffusion- A. Option A
- B. Option B
- C. Option C
- D. Option D
- E. Option E
Explanation: Explanation for this question will be added soon.
Correct answer: Option D- A. Sol
- B. Gel
- C. Colloidal
- D. True solution
Explanation: The peripheral parts of a cell are often like gel.
Correct answer: Gel- A. Glycoprotein
- B. Carrier protein
- C. Lipid
- D. Carbohydrates
Explanation: The fluidity of the plasma membrane is primarily controlled by the composition and arrangement of lipids, specifically phospholipids.
Correct answer: Lipid2307. Cell wall is made up of:
- A. Cellulose
- B. Cell
- C. Ribosomes
- D. Penicillin binding protein
Explanation: The cell wall is synthesized by cellulose which is a polymer of beta-glucose.
Correct answer: Cellulose- A. Wall pressure
- B. Internal pressure
- C. Vacuole
- D. Osmotic pressure
Explanation: "The membrane that bounds vacuole, is called tonoplast which contains a number of active transport systems that pump ions into the vacuole…
Correct answer: Vacuole- A. Cell wall
- B. Cell membrane
- C. Cytoplasm
- D. Nuclear membrane
Explanation: The plasma membrane of all cells represents the universal boundary between the cell and its surroundings.
Correct answer: Cell membrane- A. Vacuole
- B. Lysosome
- C. Nucleus
- D. Endoplasmic reticulum
Explanation: Nucleolus and nuclear membrane always disappear during mitosis and meiosis.
Correct answer: Nucleus- A. Semi-permeable
- B. Differentially permeable
- C. Permeable
- D. Not permeable
Explanation: The cell wall is dead and fully permeable. It cannot regulate the entry of solvent or solute molecules.
Correct answer: Permeable- A. Proteins are not fixed at their position
- B. Hydrophobic tail facing inward and hydrophilic head facing outward
- C. The two surfaces and halves are not identical
- D. Cholesterol molecules are only present inside
Explanation: The cell membrane is an asymmetric structure. That means that the two sides of the membrane are structurally and functionally different.
Correct answer: The two surfaces and halves are not identical- A. Lipid
- B. Comer
- C. Charge pores
- D. Carbohydrates
Explanation: Channel proteins, gated channel proteins, and carrier proteins are three types of transport proteins that are involved in facilitated…
Correct answer: Charge pores- A. Glycoprotein
- B. Carrier prolein
- C. Lipid
- D. Carbohydrate
Explanation: The amount of cholesterol in animal plasma membranes regulates the fluidity of the membrane and changes based on the temperature of the…
Correct answer: Lipid- A. Outer to primary cell wall
- B. In between two primary cell walls
- C. Between the primary cell wall and plasma membrane
- D. Inner to plasma membrane
Explanation: Secondary cell walls in plants are present between the primary cell wall and the plasma membrane
Correct answer: Between the primary cell wall and plasma membrane- A. Hydrophobic
- B. Hydrophilic
- C. Globular
- D. Fitamentous
Explanation: According to the fluid mosaic model of the cell membrane, the Hydrophobic zone is embedded inside
Correct answer: Hydrophobic- A. Lipids
- B. Corner Proteins
- C. Charged Pores.
- D. Carbohydrates
Explanation: Charged pores, also known as ion channels, are essential components of the cell membrane that facilitate the exchange of materials and…
Correct answer: Charged Pores.- A. Chloroplasts
- B. Chromoplasts
- C. Leucoplasts
- D. All of these options are correct
Explanation: Plastids are of three types: 1. "Leucoplasts" --- In Roots ----colourless.
Correct answer: Leucoplasts- A. 500X
- B. 250 000X
- C. 500 000X
- D. 100 000X
Explanation: Option B is correct since the typical ( scanning ) electron microscope magnification power is X 250000.
Correct answer: 250 000X2320. According to the fluid mosaic model, the plasma membrane is composed of which of the following?:
- A. Phospholipids
- B. Extrinsic proteins
- C. Intrinsic proteins
- D. All of these
Explanation: Plasma membrane separates the internal and external environment of a cell.
Correct answer: All of these