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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Only a and b
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Only a and d
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Only b and c
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Only a and c
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Only b and d
C
Correct answer
Explanation
Mitochondria and peroxisomes are not considered parts of the endomembrane system.
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Endoplasmic reticulum
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Golgi complex
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Lysosomes
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Ribosomes
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Mitochondria
D
Correct answer
Explanation
This is the correct option. Ribosomes are the non-membrane bound organelles that are found in prokaryotic cells.
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Golgi apparatus
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Lysosome
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Contractile vacuole
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Mitochondrion
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Cytoskeleton
A
Correct answer
Explanation
This is the correct option. Golgi apparatus is an important site of formation of glycoproteins and glycolipids.
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Meristematic tissues have immature cells, capable of division.
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Meristematic tissues have mature cells, capable of division.
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Permanent tissues have mature cells, capable of division.
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Permanent tissues have immature cells, incapable of division.
A
Correct answer
Explanation
Meristematic tissues have immature cells, capable of division.
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Mitochondria
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Ribosome
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Nucleus
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Cytosol
C
Correct answer
Explanation
Nucleus is not a part of cytoplasm. Cytoplasm includes only cytosol and cell organelles.
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Due to the presence of starch granules
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Due to the presence of fat molecules
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Due to the presence of vacuoles
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Due to the presence of ribosomes
D
Correct answer
Explanation
RER looks rough when viewed under a microscope due to the presence of ribosomes on its surface.
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ER
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Golgi bodies
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Mitochondria
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Both (1) and (2)
D
Correct answer
Explanation
Both ER and Golgi bodies help in the formation of lysosomes.
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Endoplasmic reticulum
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Ribosomes
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Lysosomes
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Plasma membrane
A
Correct answer
Explanation
Smooth endoplasmic reticulum detoxifies poisons and drugs.
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Golgi apparatus
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Ribosomes
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Mitochondria
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Lysosomes
B
Correct answer
Explanation
Ribosomes manufacture proteins.
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Matrix
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Outer membrane
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Cristae
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Cisternea
C
Correct answer
Explanation
Cristae provide large surface area for cellular respiration.
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Plastids
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Mitochondria
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ER
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Both (1) and (2)
D
Correct answer
Explanation
Both plastids and mitochondria have their own DNA, besides nucleus.
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An animal cell is larger than a plant cell.
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A large vacuole is centrally located in animal cells but many small vacuoles are scattered in plant cells.
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Plant cells can withstand much greater changes in surrounding medium than animals cells.
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In plant cells, nuclear membrane is absent but cell wall is present whereas it is opposite in animal cells.
C
Correct answer
Explanation
Plant cells have rigid cell wall which helps them to withstand much greater changes in surrounding medium.
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Cellular level
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Tissue level
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Organ level
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Organ system level
A
Correct answer
Explanation
The simplest level of organisation in living beings is the cellular level.
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nerve cell
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ostrich egg
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muscle cell
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ovum
B
Correct answer
Explanation
The largest living cell is an ostrich egg.
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It is the smallest unit of life which is capable of replicating itself.
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Cells divide to produce cells of various kinds.
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All living beings possess cells.
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No cell can be seen with a naked eye.
D
Correct answer
Explanation
An egg is also a single cell which can be seen with a naked eye.