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Gerontology is old man logy, during ageing
Cells gradually lose the power to divide
Number of lysosomes increases while aldolase activity and mitochondria decreases
Change in gene expression and accumulation of some proteins
All are correct
Answers (1)
Gerontology is the study of aging, focusing on the biological, psychological, and sociological aspects of the aging process. It involves understanding the changes that occur in organisms as they grow older. Let's address each statement individually:
(1) Cells gradually lose the power to divide: This statement is partially correct. While some cells do lose the ability to divide with age, such as neurons and muscle cells, other cells, such as stem cells, retain their division capacity. Additionally, some cells may continue to divide but with reduced efficiency or increased likelihood of errors. Overall, cellular senescence, which refers to the permanent loss of cell division potential, is a characteristic feature of aging.
(2) Number of lysosomes increases while aldolase activity and mitochondria decreases: This statement is not entirely accurate. The number of lysosomes, which are cellular organelles involved in waste removal and recycling, may indeed increase with age. However, the activity of aldolase, an enzyme involved in carbohydrate metabolism, and mitochondria, the cellular powerhouses responsible for energy production, can vary depending on the cell type and the specific metabolic changes associated with aging. It is not universally true that aldolase activity and mitochondrial function always decrease during aging.
(3) Change in gene expression and accumulation of some proteins: This statement is correct. During aging, there are alterations in gene expression patterns, leading to changes in the production of various proteins. This can result in the accumulation of certain proteins that may be associated with age-related diseases or degenerative processes. These changes in gene expression and protein accumulation contribute to the aging process and age-related conditions.
Hence, the correct answer is option 3.
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