Which of the following is true concerning cancer cells?<\/p>\n\n\n\n
A. They do not exhibit density-dependent inhibition when growing in culture.
B. When they stop dividing, they do so at random points in the cell cycle.
C. They are not subject to cell cycle controls.
D. B and C only
E. A, B, and C<\/p>\n\n\n\n
The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n Correct Answer: E. A, B, and C<\/strong><\/p>\n\n\n\n Cancer cells differ from normal cells in several key ways that relate to how they grow and divide. The statement E. A, B, and C<\/strong> is correct because all three statements (A, B, and C)<\/strong> describe known behaviors of cancer cells. Here’s an explanation of each:<\/p>\n\n\n\n A. They do not exhibit density-dependent inhibition when growing in culture.<\/strong> B. When they stop dividing, they do so at random points in the cell cycle.<\/strong> C. They are not subject to cell cycle controls.<\/strong> Conclusion:<\/strong> Which of the following is true concerning cancer cells? A. They do not exhibit density-dependent inhibition when growing in culture.B. When they stop dividing, they do so at random points in the cell cycle.C. They are not subject to cell cycle controls.D. B and C onlyE. A, B, and C The correct answer and explanation […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-210202","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210202","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=210202"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210202\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=210202"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=210202"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=210202"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
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This is true. Normal cells typically exhibit density-dependent inhibition<\/em>, meaning they stop dividing when they come into contact with neighboring cells and the available space is filled. This is a form of regulation that prevents overcrowding. Cancer cells, however, ignore these signals<\/em> and continue to divide even when the culture dish is full, leading to piles or clumps of cells. This behavior contributes to tumor formation in the body.<\/p>\n\n\n\n
\n\n\n\n
Also true. Normal cells stop dividing at specific checkpoints in the cell cycle, particularly the G1 checkpoint, where the cell decides whether to proceed with division. Cancer cells often have mutations in genes that regulate these checkpoints (such as p53<\/em>), allowing them to either bypass the checkpoints or halt at unpredictable times. This lack of orderly control leads to abnormal cell cycle progression.<\/p>\n\n\n\n
\n\n\n\n
This statement is somewhat generalized, but essentially true. Cancer cells often have defective cell cycle regulation<\/strong> due to mutations in key regulatory genes (like proto-oncogenes or tumor suppressor genes). This makes them less responsive or completely unresponsive to normal regulatory signals that control cell division, repair, and apoptosis.<\/p>\n\n\n\n
\n\n\n\n
Because all three statements (A, B, and C)<\/strong> accurately describe the abnormal behaviors of cancer cells, the correct answer is E<\/strong>. These features enable cancer cells to proliferate uncontrollably, contributing to tumor development and metastasis.<\/p>\n","protected":false},"excerpt":{"rendered":"