Biology ยท Science General
Cell Biology and Structure
3,221 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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Mitochondria contains DNA.
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Vacuoles contain acidic enzymes.
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Cynophycean bodies are formed in prokaryotes.
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Primary lysosomes are pinched off from the Golgi body.
B
Correct answer
Explanation
Vacuoles are fluid filled structures which help in storage.
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Mitochondrial membrane
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Membrane around vacuoles
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Chloroplast in some algae
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Dictyosomes
B
Correct answer
Explanation
Membrane around vacuoles is called tonoplast.
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Golgi bodies
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Lysosomes
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Vacuoles
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Mitochondria
B
Correct answer
Explanation
Lysosomes change the nature of their contents at different times in the cell. This is called polymorphism.
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Lysosome
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Endosome
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Phagosome
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Dictyosomes
B
Correct answer
Explanation
An endosome is a membrane-bounded compartment inside eukaryotic cells. It is a compartment of the endocytic membrane transport pathway from the plasma membrane.
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plasmodesmata
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endoplasmic reticulum
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cell membrane
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pili
A
Correct answer
Explanation
Plasmodesmata are pores in the secondary cell wall.
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The structural, functional and biological unit of all organisms.
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A unit of biological activity surrounded by semipermeable membrane and capable of self-reproduction in a medium free of other living systems.
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Naked speck of protoplasm with a nucleus.
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Cells are organisms and entire plants and animals are aggregation of these organisms arranged according to definitive lam.
B
Correct answer
Explanation
This definition was given by Lowery and Scikevits.
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The cell theory
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Law of cell lineage
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Cell principle
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Cellular differentiation
B
Correct answer
Explanation
According to the law of cell lineage, new cells develop from the division of pre-existing cells.
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There are different kinds of cells.
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Tissues become morphologically different.
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Several tissues differentiate to form an organ.
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Grouping of organs to perform major functions of the body.
B
Correct answer
Explanation
Cells that do the same job combine together to form body tissue, such as muscle, skin, or bone tissue. According to their function, the tissue becomes morphologically different, this is known as cellular differentiation.
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Hydra
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Paramecium
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Sponge
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Fungi
B
Correct answer
Explanation
It is a unicellular organism. Therefore, if even a single cell is starved, the whole organism would die.
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Vacuole
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Centriole
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Lysosomes
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Golgi complex
B
Correct answer
Explanation
Centrioles have no membrane.
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The life span is greater.
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Division of labour to carry out many processes.
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Cell has a dual existence.
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Decreased regeneration capacity.
D
Correct answer
Explanation
Due to multicellularity, the regeneration capacity is reduced due to specialisation.
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a single nucleus
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more than one nucleus in a cell
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one cell
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numerous cells
B
Correct answer
Explanation
A nuclear division without corresponding cell division results in multinucleate organism. Such organisms are called coenocytic.
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an autonomous unit
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totipotent
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an open system
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selectively permeable
C
Correct answer
Explanation
Cell is an open system because it allows free entry and exit of matter and energy.
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Cytoplasm
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Cell membrane
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Chloroplast
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Vacuole
C
Correct answer
Explanation
Chloroplast contains photosynthetic pigments and is found only in plant cells.
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Somatic hybridisation
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Somatic reproduction
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Totipotency
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Cloning
C
Correct answer
Explanation
Totipotency is called the formation of a well developed organism from a vegetative cell.