GRB Biology Class 11. We covered all the GRB Biology Class 11 MCQs in this post for free so that you can practice well for the exam.
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GRB Biology Class 11 Objective for Students
Which one of the following pairs is not correctly matched?
(a) Vitamin B12 anti anemic factor
(b) Vitamin C antiscorbutic factor
(c) Vitamin D anti sterility factor
(d) Vitamin K antihaemorrhagic factor
Option c – Vitamin D anti sterility factor
Gene is:
(a) A segment of DNA
(b) A segment of DNA and histone
(c) A segment of DNA, RNA, and histone
(d) All of the above
Option a – A segment of DNA
Which of the following diseases are caused by the consumption of water contaminated by mercury and nitrate?
(a) Minamata disease and Osteoporosis
(b) Osteoporosis and Blue Baby Syndrome
(c) Minamata disease and Blue Baby Syndrome
(d) Osteoporosis and Minamata disease
Option c – Minamata disease and Blue Baby Syndrome
Which one of the following elements is present in the green pigment of leaves?
(a) Magnesium
(b) Iron
(c) Calcium
(d) Copper
Option a – Magnesium
Which one of the following is a major effect of long-term consumption of drinking water containing little (less than 0.5 ppm) or no fluoride?
(a) Cavity of tooth
(b) Erosion of nail
(c) Deformation of bone
(d) Mottling of tooth
Option c – Deformation of bone
Polynucleotide chain of DNA contains:
(a) A nitrogenous base, deoxyribose sugar, and phosphate group
(b) A nitrogenous base, ribose sugar, and phosphate group
(c) Deoxyribose sugar, ribose sugar, and phosphate group
(d) A nitrogenous base and phosphate group only
Option a – A nitrogenous base, deoxyribose sugar, and phosphate group
We covered all the grb biology class 11 mcqs above in this post for free so that you can practice well for the exam.
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