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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controlling movement of molecules between the cytosol and sap
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storing useful material
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digesting waste proteins
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excreting unwanted materials
D
Correct answer
Explanation
The central vacuole of the plant cell does not excrete unwanted materials.
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chromoplasts
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leucoplasts
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mitochondria
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vacuoles
B
Correct answer
Explanation
In plant cells, the synthesis of palmitic acid takes place in leucoplasts.
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pigment synthesis and storage
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dismantling of the photosynthetic apparatus
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protein modification
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detecting gravity
B
Correct answer
Explanation
Gerontoplasts are involved in dismantling of the photosynthetic apparatus during senescence.
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Cell wall and nuclei
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Mitochondria and nuclear membrane
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Nuclei and ribosomes
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Golgi bodies and vacuoles
C
Correct answer
Explanation
Sieve tube elements lack nuclei and ribosomes.
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lysigenous intercellular space
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schizogenous intercellular space
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gap junction
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phragmosome
B
Correct answer
Explanation
The space resulting from separation of cell walls from each other, as the cells grow older by partial dissolution of inter-cellular substance, is called schizogenous intercellular space.
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ribosome
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spherosome
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peroxisome
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centrosome
C
Correct answer
Explanation
Peroxisomes are essential organelles in photorespiration, where they process glycolate produced by RuBisCO oxygenase activity. The photorespiratory pathway involves three organelles: chloroplast (where glycolate is produced), peroxisome (where glycolate is converted to glycine), and mitochondria (where glycine is decarboxylated). Ribosomes, spherosomes, and centrosomes are not involved in this process.
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golgi body
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endoplasmic reticulum
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lysosomes
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mitochondria
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spherosomes
B
Correct answer
Explanation
Myeloid bodies and nissl granules are believed to be formed from endoplasmic reticulum.
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Glucose 6-phosphatase
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Peptidase
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β-glucuronidase
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Nucleotidase
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Amylase
D
Correct answer
Explanation
The enzyme nucleotidase is present on the cytoplasmic surface of endoplasmic reticulum.
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liver cells
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mature erythrocyte
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kidney cells
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mature leucocytes
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fungi
B
Correct answer
Explanation
Endoplasmic reticulum is not found in mature erythrocyte. So, this is the correct answer.
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Cyto b5
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Reductase
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Nucleotidase
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P-450
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Glucose 6-phosphatase
E
Correct answer
Explanation
Glucose 6-phosphatase is present on the luminar surface of the endoplasmic reticulum.
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mitochondria
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golgi bodies
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endoplasmic reticulum
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lysosomes
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plastids
C
Correct answer
Explanation
A membrane lined system of channels present throughout the cytoplasm is called endoplasmic reticulum. So, this is the correct answer.
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Rough endoplasmic reticulum
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Smooth endoplasmic reticulum
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Sarcoplasmic reticulum
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Cisternae
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Vesicles
B
Correct answer
Explanation
Correct answer. The endoplasmic reticulum without attached ribosomes is called a granular or smooth endoplasmic reticulum.
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sertoli cells
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liver cells
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pancreatic cells
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kidney cells
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nerve cells
B
Correct answer
Explanation
Correct answer. Endoplasmic reticulum was discovered from liver cells.
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adipose cells
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retinal cells
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pancreatic acinus cells
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interstitial epithelial cells
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leucocytes
C
Correct answer
Explanation
Correct answer. Rough endoplasmic reticulum is found abundantly in pancreatic acinus cells.
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cisternae
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tubules
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vesicles
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vesicles and tubules
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vesicles and cisternae
A
Correct answer
Explanation
Correct answer. Rough endoplasmic reticulum has more cisternae than smooth endoplasmic reticulum.