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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Residual body
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Secondary lysosome
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Autophagosome
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Spherosome
B
Correct answer
Explanation
Secondary lysosome is formed from fusion of primary lysosome with phagosome.
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S stands for sedimentation coefficient of ribosome.
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High concentration of Mg ions is required for the attachment of ribosomal units.
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Ribosomes are porous organelles.
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Ribosomes are formed inside nucleolus.
B
Correct answer
Explanation
Low concentration of Mg ions is required for the attachment of ribosomal sub-units.
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cristae of mitochondria
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matrix of mitochondria
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inter-membrane space of mitochondria
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inner boundary membrane of mitochondria
B
Correct answer
Explanation
The matrix of mitochondria contains enzymes for TCA cycle.
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Vesicles of golgi bodies
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Vesicles of endoplasmic reticulum
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Newly formed lysosomes
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Microbodies
B
Correct answer
Explanation
Microsomes are vesicular structures of endoplasmic reticulum.
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Microtubules
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Microfilaments
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Intermediate filaments
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Flagella
B
Correct answer
Explanation
Microfilaments have a contractile function.
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Amyloplasts
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Elaioplasts
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Aleuroplasts
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Phaeoplasts
C
Correct answer
Explanation
Aleuroplasts are protein-storing plastids.
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cartilage
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muscle
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tissue
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bone
C
Correct answer
Explanation
A tissue is defined as a group of cells that are similar in structure and work together to perform a specific function in an organism.
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Collenchyma
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Parenchyma
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Sclerenchyma
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Epidermis
A
Correct answer
Explanation
Correct answer is Collenchyma. Collenchyma provides extra structural support, particularly in regions of new growth.
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Fibroblasts
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Macrophages
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Adipose
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Mast
C
Correct answer
Explanation
Adipose tissue is a type of connective tissue specialized for storing fat (lipids) in cells called adipocytes.
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epidermis
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epithelial
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vascular
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permanent
B
Correct answer
Explanation
The four fundamental types of animal tissues are epithelial, connective, muscular, and nervous tissue.
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Collenchyma
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Parenchyma
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Sclerenchyma
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Epidermis
B
Correct answer
Explanation
Parenchyma serves as a food storage tissue. It stores starch, protein, fats, oils and water in roots, tubers (e.g. potatoes), seed endosperm (e.g. cereals) and cotyledons (e.g. pulses and peanuts).
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During photosynthesis
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During respiration
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During cell division
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During transpiration
C
Correct answer
Explanation
Number of Golgi bodies increases during cell division when these organelles secrete materials to form cell plate.
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Peroxisomes
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Mitochondria
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Vacuoles
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Chloroplast
C
Correct answer
Explanation
Vacuoles are members of endomembrane system.
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Glyoxysomes
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Peroxisomes
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Glycosomes
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Lysosomes
B
Correct answer
Explanation
Peroxisomal disorders are a class of medical conditions that typically affect the human nervous system as well as many other organ systems.
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Lysosomes
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Fat droplets
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Smooth endoplasmic reticulum (SER)
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Rough endoplasmic reticulum (RER)
C
Correct answer
Explanation
SER is the major site of lipid biosynthesis.