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 67 of 124
- A. Cisternae
- B. Cristae
- C. Lemma
- D. Tonoplast
Explanation: Cristae are the folds of the inner membrane of mitochondria.The inner membrane of mitochondria is where most of the cellular respiration…
Correct answer: Cristae- A. Fungi
- B. Algae
- C. Virus
- D. Microbes
Explanation: Here are some of the reasons why the cell theory is not applicable to viruses:Viruses do not have a cell membrane.
Correct answer: Virus- A. Nucleolus
- B. Peroxisome
- C. Golgi body
- D. Nucleoplasm
Explanation: Ribosomal RNA (rRNA) is synthesized ima and stored in the nucleolus. Central fibril area of the nucleolus has large molecular weight RNA…
Correct answer: Nucleolus- A. Ribosome
- B. Lysosomes
- C. Liposomes
- D. Mitochondria
Explanation: Digestive enzymes are present in lysosomes. Lysosomes are membrane-bound organelles that contain a variety of hydrolytic enzymes, which…
Correct answer: Lysosomes- A. Golgi complex
- B. Nucleus
- C. Endoplasmic reticulum
- D. Vacuoles
Explanation: Vacuole is single membrane bounded organelle. This single membrane is known as tonoplast.
Correct answer: Vacuoles- A. Microfilaments
- B. Microvilli
- C. Microtubules
- D. Intermediate filaments
Explanation: In a cross section, each centriole appears as a ring of nine triplets of microtubules.
Correct answer: Microtubules- A. Chloroplast and mitochondria cannot live independently
- B. 70S ribosome is attached with the inner membrane of mitochondria and chloroplast
- C. Chloroplast and mitochondria are single membrane structures
- D. Number of mitochondria and chloroplast are same in all cells
Explanation: 70S ribosomes are attached to the inner membrane of mitochondria and chloroplasts because they are the type of ribosomes that are found in…
Correct answer: 70S ribosome is attached with the inner membrane of mitochondria and chloroplast- A. Facilitated diffusion and osmosis
- B. Pinocytosis and facilitated diffusion
- C. Diffusion and exocytosis
- D. Osmosis and phagocytosis
Explanation: Osmosis, diffusion and facilitated diffusion are passive processes of passage of molecules across the cell membrane but exocytosis and…
Correct answer: Facilitated diffusion and osmosis- A. Ribosomes
- B. Nucleus
- C. Plasma membrane
- D. Cell wall
Explanation: The prokaryotic cell envelope consists of a three-layered structure - the outermost glycocalyx, followed by a cell wall and then the…
Correct answer: Cell wall- A. Ribosome
- B. Lysosome
- C. Chloroplast
- D. Nucleus
Explanation: Mitochondria and chloroplasts both are considered as semi autonomous organelles, as they have their own circular DNA and 70S ribosomes.
Correct answer: Chloroplast- A. Fungi
- B. Bacteria
- C. Algae
- D. Virus
Explanation: Cell theory is a fundamental concept in biology. It explains basis of living unit of life that is cdl.
Correct answer: Virus- A. 4X
- B. 40X
- C. 10X
- D. 400X
Explanation: Resolving of microscope is calculated by multiplying power of an objective lense and eyepiece. 40(10)=400X
Correct answer: 400X- A. Mitochondria
- B. Endoplasmic reticulum
- C. Ribosomes
- D. Cell wall
Explanation: Plants contain cell wall as outer most membrane whereas in animal cell it is absent.
Correct answer: Cell wall- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: Centrioles are absent in higher plant cells.
Correct answer: Option B- A. Obtuse angle
- B. Parallel angle
- C. Right angle
- D. Horizontal angle
Explanation: Cellulose fibers are responsible for strengthening of cell wall of plants in crisscross manner and placing these fibers at right angle…
Correct answer: Right angle- A. Murein
- B. Sacculus
- C. Peptidoglycan
- D. All A, B, C
Explanation: Cell wall of prokaryotes is composed of polysaccharide chains bounded to shorter chains of amino acid fonning peptidoglycan or murein.
Correct answer: All A, B, C- A. Silica
- B. Pectin
- C. Waxes
- D. Cutin
Explanation: All are present in the secondary cell wall except pectin, as it is a component of the primary cell wall.
Correct answer: Pectin- A. Protein
- B. Phospholipids
- C. Glycolipids
- D. Cholesterol
Explanation: Phospholipids provide mechanical support to the cell membrane and also has a hydrophobic region.
Correct answer: Phospholipids- A. Phagocytosis
- B. Autophagy
- C. Pinocytosis
- D. Exocytosis
Explanation: Autophagy is the natural, regulatory mechanism of the cell that removes unnecessary or dysfunctional components.
Correct answer: Autophagy- A. Facilitated diffusion and osmosis
- B. Diffusion and exocytosis
- C. Pinocytosis and facilitated diffusion
- D. Osmosis and phagocytosis
Explanation: Osmosis, diffusion and facilitated diffusion are passive processes of passage of molecules across the cell membrane but exocytosis and…
Correct answer: Facilitated diffusion and osmosis