Biology · Science General
Cell Biology and Structure
3,062 Questions
Cell biology focuses on the structure and function of cellular organelles. Key topics include cellular respiration, DNA inheritance, and energy production. These fundamental biology concepts are crucial for medical entrance and state service examinations.
Cell organelles functionsCellular respiration sitesDNA and ribosomesAnimal cell structurePlant cell components
Cell Biology and Structure Questions
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In cytoplasm
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On plasma membrane
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In plastids
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Along the chromosomes
D
Correct answer
Explanation
Genes are arranged in single linear order along the chromosomes in nucleus.
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granular dense fluid
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pigments
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cellulose
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ribonucleic acid
D
Correct answer
Explanation
A nucleolus found in nucleus mainly contains ribonucleic acid.
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Storage
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Formation of sugars
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Formation of cell plate
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Mechanical support to cell
D
Correct answer
Explanation
Endoplasmic reticulum provides mechanical support to a cell.
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plasma membrane
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cell wall
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nuclear membrane
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tonoplast
A
Correct answer
Explanation
Plasma membrane is the outer most layer in an animal cell. So, it is a barrier between protoplasm and outer environment.
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Cell wall
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Large vacuole
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Chloroplast
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Endoplasmic reticulum
D
Correct answer
Explanation
Endoplasmic reticulum is a large network of tubes and sheets. They are present in all cells.
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A cell has four functional regions.
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A cell is the basic unit of all organisms.
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Cell is alive.
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Robert Hook discovered the cell.
A
Correct answer
Explanation
A cell has only three functional regions - plasma membrane, nucleus and cytoplasm.
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Stroma
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Golgi apparatus
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Vacuoles
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Endoplasmic reticulum
A
Correct answer
Explanation
Stroma contains DNA, ribosomes and RNA also. Stroma is a structure of chloroplast.
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For cell protection
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Gives shape and size
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Basic unit of a organism
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Functional unit of a cell
D
Correct answer
Explanation
A cell organelle is a functional unit of a cell, which performs all activities, like respiration, photosynthesis, etc.
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Robert Brown discovered the nucleus.
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It is the largest cell structure.
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It contains plastids.
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It is centrally located in a cell.
C
Correct answer
Explanation
Nucleus does not contain plastids. It is found in cytoplasm of a plant cell.
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Smooth endoplasmic reticulum
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Chloroplast
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Tubes and sheets
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Rough endoplasmic reticulum
D
Correct answer
Explanation
Rough ER is concerned with the transport of proteins, which are synthesised by ribosomes on its surface.
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Plasma membrane
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Nucleus
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Protoplasm
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Cell wall
D
Correct answer
Explanation
Cell wall is the outer most layer of a plant cell, made up of cellulose. It is non-living in nature.
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Endoplasmic reticulum
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Plastids
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Ribosomes
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Mitochondria
D
Correct answer
Explanation
Mitochondria is found single in number in the cell.
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Hydrolytic enzymes
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Amino acids
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Toxic metabolic products
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ATP
A
Correct answer
Explanation
Lysosomes have their own hydrolytic enzymes for self destruction.
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Synthesis of substances
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Digestion of substances
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Living in nature
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Structural organisation
D
Correct answer
Explanation
Cells and machines both have a particular structural organisation for working.
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Endoplasmic reticulum
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Mitochondria
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Ribosomes
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Lysosomes
A
Correct answer
Explanation
Endoplasmic reticulum serves as channels for the transport of materials between various regions of the cytoplasm. So, it is called 'Internal transport system'.