Biology · 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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presence of nuclear membrane
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presence of single chromosome
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presence of cytoplasm
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presence of respiratory enzymes on cell membrane
C
Correct answer
Explanation
Presence of cytoplasm -Present both in prokaryotes and eukaryotes. The cytoplasm is a fluid containing organelles with specialized functions and organelles.
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ribosome
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mitochondria
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nucleus
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cell wall
D
Correct answer
Explanation
Cell Wall - Plant cells are rigid because of presence of cell wall made up of cellulose which is lacking in animal cell.
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Mitochondrion
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Chloroplast
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Peroxisome
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Ribosome
D
Correct answer
Explanation
Ribosome is not surrounded by one or more membranes.
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spherosome
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dictyosome
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lysosome
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endosome
C
Correct answer
Explanation
The 'Suicidal'bag of an animal cell is lysosome.
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Nucleus
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Chloroplasts
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Cell walls
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Mitochondria
C
Correct answer
Explanation
Cell walls are present in both, prokaryotic cells and in eukaryotic plant cells
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(a) and (b)
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(b) and (c)
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(c) and (d)
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(a) and (d)
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(b) and (d)
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Ectoplasm
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Contractile vacuole
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Nucleus
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Pseudopodium
D
Correct answer
Explanation
It is a protuberance, from the surface of the amoeba, into which the cytoplasm flows. In this way, the amoeba moves about over the mud at the bottom of the pond. It also helps amoeba in feeding.
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Goblet cells
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Oxyntic cells
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Serous cells
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Mucous cells
B
Correct answer
Explanation
These cells are also called parietal cells. These cells are situated mainly towards, the neck of the gastric glands. They secrete hydrochloric acid and intrinsic factor.
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found in the thylakoid lumen
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found in chloroplasts
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found in the thylakoid proteome
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found in thylakoid integral membrane proteins
B
Correct answer
Explanation
A granum (plural grana) is a stack of thylakoid discs. Chloroplasts can have from 10 to 100 grana. Grana are connected by stroma thylakoids, also called intergrana thylakoids or lamellae.
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Animal cell - plastids
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Plant cell - mitochondria
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Animal cell - cell wall
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Plant cell - centrosome
B
Correct answer
Explanation
Animal cells do not have plastids and cell wall. Similarly, plant cells do not have centrosomes. Thus, option (2) is the only correct match.
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companion cells
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tracheids
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sieve elements
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vessel elements
B
Correct answer
Explanation
The tracheids form tubes that communicate with neighbouring tubes through pores.
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Tracheid
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Companion cell
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Vessel element
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Cork cell
B
Correct answer
Explanation
Companion cells are living cells and they help in the absorption of the material to be transported.
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Guard cell
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Trichome
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Root hair
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Cork
D
Correct answer
Explanation
Cork is not an epidermal cell. It is a peridermal cell.
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Outside the cell
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in the Mitochondrial matrix
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in the Mitochondrial cristae
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in the Cytoplasm
D
Correct answer
Explanation
Glycolysis takes place inside the cytoplasm of the cell. The cytoplasm is the aqueous based solution inside a cell that has a variety of molecules solubilized in it. The contents of the cytoplasm include proteins, carbohydrates, nucleic acids, salts and a whole host of other soluble molecules.
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Cytoplasm
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Mitochondrial matrix
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Mitochondrial cristae
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Intercellular space
B
Correct answer
Explanation
The oxidation of pyruvic acid into CO2 and water is called Krebs cycle. This cycle is also citric acid cycle because the cycle begins with the formation of citric acid. This cycle is also called as tri carboxylic acid cycle or TCA cycle. This cycle occurs only in the presence of oxygen.It takes place in the mitochondrial matrix.