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The lymphoid tissue, located within the lining of digestive tract is

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Important Questions on Human Health and Disease

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 88
The cells called ‘HIV factory’ is
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 93
Cancer cells do not exhibit the property of
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 94
A person suffering from leukaemia has
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 95
Read the following statements and select the correct option.
Statement I: Malignant tumors normally remain confined to their original location, do not spread to other body parts and cause less damage.
Statement II: Cancer arising from epithelial tissues of internal organs and glands is referred to as sarcoma e.g., breast cancer, cervical cancer etc.
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 96
A metastatic cancerous tumour is termed ‘sarcoma’ if the disorder is in
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 97
Following table summarises the differences between normal cells and cancerous cells. Pick up the wrong difference(s) and select the correct option.
Normal Cells Cancerous Cell
(i) These cells undergo cell division as well as differentiation. These cells undergo cell division but do not undergo differentiation.
(ii) These cells show contact inhibition i.e., after coming in contact with other cells, these inhibit their uncontrolled growth. These cells have lost the property of contact inhibition.
(iii) Life span of these cells is not definite. Life span of these cells is definite.
(iv) These cells divide in controlled manner. These cells divide in an uncontrolled manner.
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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 99

Several genes called                 have been identified in normal cells which when activated will turn into                  , and under certain conditions, could lead to cancerous transformation of the cells.
Complete the above paragraph by selecting correct sequence of words.

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MTG OBJECTIVE NCERT AT YOUR FINGERTIPS BIOLOGY CLASS XI + XII>Chapter 31 - Human Health and Disease>MCQS CORNER>Q 100
Major factors that cause cancer are