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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Telescope
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Microscope
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Endoscope
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Stethoscope
B
Correct answer
Explanation
Microscope is the instrument used to see larger view of the small sized structures. Endoscope is the instrument with a light attached to see inside the body cavity. Telescope is the instrument used to see remote objects. Stethoscope is the instrument used by doctors to check a person’s heartbeat.
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Cytoplasm
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Cell membrane
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Golgi body
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Vacuole
B
Correct answer
Explanation
A cell is surrounded by a thin boundary known as cell membrane, whereas cytoplasm is a jelly like substance in the cell where all cell organelles are placed. Golgi body and vacuole make up the cell organelle.
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pericycle
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cortical cells
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epidermal cells
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All of the above
A
Correct answer
Explanation
Endogenous word refers to growth of branches from the pericycle.
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DNA replication
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translation of m-RNA
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photorespiration
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photoperiodism
C
Correct answer
Explanation
Peroxisomes contain enzymes for photorespiration which occur when carbon-dioxide level is low and RUBP is oxygenated to form phosphoglycolate and 3-phosphoglycerate.
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stroma of chloroplasts
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cristae of mitochondria
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nuclear membrane
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cytoplasm
A
Correct answer
Explanation
Calvin cycle of photosynthesis occurs in the stroma of chloroplasts to produce glyceraldehyde-3-phosphate.
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gap junctions
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membrane nanotubes
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plasmodesmata
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stromules
C
Correct answer
Explanation
Plasmodesmata are microscopic channels which traverse the cell walls of plant cells to connect the cytoplasm of the neighbouring cells.
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Chondrocytes
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Osteoblasts
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Histiocytes
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Myocytes
D
Correct answer
Explanation
They are the cells of muscle tissue.
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They are irregularly amoeboid shaped.
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They are the least abundant formed element of blood.
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They have a life span of 3-7 years.
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They are non-nucleated fragments of giant cells.
D
Correct answer
Explanation
They are the non- nucleated fragments of megakaryocytes of bone marrow.
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Osteocytes
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Adipocytes
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Chondrocytes
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Leucocytes
B
Correct answer
Explanation
These cells contain the fat droplet.
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Epidermis of skin
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Endothelium of blood vessels
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Skeletal tissue of bones
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Nervous tissue of brain
D
Correct answer
Explanation
They are the tissues which do not get repaired after getting impaired once.
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Desmosomes
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Ribosomes
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Oxysomes
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Peroxisomes
A
Correct answer
Explanation
They are the channels for exchange of material.
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Mast cells
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Histiocytes
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Osteocytes
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Fibrocytes
A
Correct answer
Explanation
They are the matrix-secreting cells of this tissue.
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broken cells
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normal cells
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specialized cells
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differentiated cells
C
Correct answer
Explanation
Regeneration is carried out by specialized cells, which can proliferate at a fast rate. Also, they can form all the different cells that are required to form the body part that the organism needs to regenerate. Broken cells may not proliferate while “all cells” cannot have the above mentioned specialized features. Differentiated cells take up a fixed role and may not be able to produce all the cells required in regeneration.
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Animals lack a rigid shape.
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Animal cells have large vacuoles.
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Plant cells lack golgi bodies.
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Plant cells lack a well organised nucleus.
A
Correct answer
Explanation
As the animal cells do not have cell wall so they lack rigidity.
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Respiration will not take place.
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Photosynthesis will not occur.
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Fats will not be stored.
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Proteins will not be synthesised.
D
Correct answer
Explanation
Ribosomes are concerned with protein synthesis.