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 74 of 124
- A. Enzymes and coenzymes
- B. Organic and inorganic salts
- C. Enzymes, coenzymes, organic and inorganic salts
- D. Enzymes, coenzymes, organic and inorganic salts and DNA with ribosomes
Explanation: Mitochondria are power houses of the cells where two important phases of aerobic respiration are accomplished i.e., Krebs cycle and…
Correct answer: Enzymes, coenzymes, organic and inorganic salts and DNA with ribosomes- A. Glucose
- B. ATP
- C. NADPH
- D. ADP
Explanation: Being power house of the cell mitochondria are involved in synthesis of most of the energy in the form of ATP through aerobic respiration…
Correct answer: ATP- A. One centriole
- B. Two centrioles
- C. Two pairs of centrioles
- D. Two mitochondria
Explanation: Centrioles are located on the outer surface of nucleus making right angle with each other in a non-dividing cell.
Correct answer: Two centrioles- A. Chromosomes duplicate
- B. Centrioles duplicate
- C. Ribosomes duplicate
- D. Nucleoli duplicate
Explanation: Duplication of centrioles is the first indication of initiation of cell division in animal cells.
Correct answer: Centrioles duplicate- A. Cytokinesis of plant cell
- B. Karyokinesis of plant cell
- C. Furrowing during cell division
- D. Formation of mitotic apparatus in plants
Explanation: In animal cells cytokinesis occurs through furrowing and it starts at the central point between centriole pairs positioned on opposite…
Correct answer: Furrowing during cell division- A. Ribosomes
- B. Nuclei
- C. Mitochondria
- D. Golgi Apparatus
Explanation: Ribosomes are tiny membraneless granular structures of both prokaryotic and eukaryotic cells.
Correct answer: Ribosomes- A. Ribosomes
- B. Lysosomes
- C. Nucleosomes
- D. Golgi vesicles
Explanation: Ribosomes are made up of RNA and proteins. Palade discovered the ribosomes
Correct answer: Ribosomes- A. Freely scattered in cytoplasm and attached with SER
- B. Freely scattered in cytoplasm and attached with RER
- C. Freely scattered in nucleoplasm and attached with RER
- D. Freely scattered in nucleoplasm and attatched with SER
Explanation: Ribosomes are of two types with respect to their spatial distribution in cell i.e., free and attached with membrane of endoplasmic…
Correct answer: Freely scattered in cytoplasm and attached with RER- A. The larger subunits sediments at 60S while smaller subunits sediments at 40S.
- B. The larger subunit sediments at 50S, while smaller subunit sediments at 30S.
- C. The larger subunit sediments at 60S, while smaller subunit sediments at 30S.
- D. The larger subunit sediments at 50S, while smaller subunit sediments at 40S.
Explanation: The larger subunit (60S) have higher rate of sedimentation as compared to smaller one (40S), for eukaryotes
Correct answer: The larger subunits sediments at 60S while smaller subunits sediments at 40S.- A. 3- end
- B. 2- end
- C. 4- end
- D. 5- end
Explanation: The genetic message, transcribed on mRNA is translated in 5' to 3' direction.
Correct answer: 5- end- A. Nucleus
- B. Nucleolus
- C. Mitochondria
- D. Golgi apparatus
Explanation: As nucleolus is the factory of ribosome synthesis.
Correct answer: Nucleolus1472. The factory of ribosomes is the,..............while that of protein synthesis is the ..........
- A. Nucleolus, ribosomes
- B. Nucleus, ribosomes
- C. Ribosomes, nucleolus
- D. Nucleolus, mitochondria
Explanation: Nucleoli synthesize the ribosomes and in turn ribosomes synthesize the proteins.
Correct answer: Nucleolus, ribosomes- A. Uremia
- B. Glycogenosis
- C. Myocardial infarction
- D. Cerebral infarction
Explanation: It is a lysosomal disorder which is inherited by birth as a genetic deficiency.
Correct answer: Glycogenosis- A. Mental disorder
- B. Congenital disorder
- C. Lysosomal disorder
- D. Cardiovascular disorder
Explanation: Tay sach's diseases is a congenital disorder due to deficiency of a particular lysosome (enzyme) associated with catabolism of lipids.
Correct answer: Cardiovascular disorder- A. Metabolism
- B. Anabolism
- C. Catabolism
- D. Catalysis
Explanation: Glyoxisomes contain such enzymes which are associated with conversion of stored fatty acids to carbohydrates in seedlings of oil yielding…
Correct answer: Catabolism- A. Cilia
- B. Flagella
- C. Centrioles
- D. Microbodies
Explanation: Microbodies are simple membrane-bounded vesicular organelles like peroxisomes and glyoxisomes.
Correct answer: Microbodies- A. Microtubules
- B. Microfilaments
- C. Intermediate filaments
- D. Myofilaments
Explanation: Microfilaments are made up of contractile actin proteins. They contract and relax rhythmically in a cell and generate a pumping pressure…
Correct answer: Microfilaments- A. Position in cell
- B. Composition
- C. Length
- D. Diameter
Explanation: Fact: The diameter of intermediate filaments is in between that of microtubules and microfilaments.
Correct answer: Diameter- A. Glycogenosis
- B. Lysosomal disorder
- C. Mental retardation
- D. Storage disease
Explanation: Due to the deficiency of such enzymes, lipids are accumulated in the brain cells, which lead to mental retardation or even death.
Correct answer: Mental retardation- A. Accumulation of lipids in brain cells
- B. Mental retardation
- C. Death
- D. Absence of an enzyme involved in catabolism of lipids
Explanation: The worst consequence of the accumulation of lipids in brain is the death of human being.
Correct answer: Death