CBSE Class 12 Biology Environmental Issues MCQs

Question : Pollution causes undesirable changes in which the following characteristics of air, water, land or soil ? a) Physical   b) Chemical c) Biological d) All of these Answer : D Question : To improve the quality of environment (air, water and soil) the Govt. of…

CBSE Class 12 Biology Biodiversity and Conservation MCQs

  Question :  Biodiversity describes the study of diversity a) below species level. b) at species level. c) at community level. d) at all levels of biological organization. Answer : D Question :  Alpha diversity is present a) within community. b) between…

CBSE Class 12 Biology Ecosystem MCQs

Question :  An ecosystem is a a) group of components that interact with one another. b) group of interacting species in one place at one time. c) biological community and component of the physical environment with which the community interacts. d) group of interacting…

CBSE Class 12 Biology Organisms and Populations MCQs

Question : The term ‘precipitation’ includes a) rain b) snow c) hails d) all forms of water that fall to the ground. Answer : D Question : What are the key elements that lead to so much variations in the physical and chemical conditions of different habitats? a)…

CBSE Class 12 Biology Biotechnology and Its Applications MCQs

Question : Consumption of which one of the following foods can prevent the kind of blindness associated with vitamin ‘A’ deficiency? a) ‘Flavr Savr’ tomato b) Canolla c) Golden rice            d) Bt-Brinjal Answer : C Question : Bacillus…

CBSE Class 12 Biology Biotechnology Principles and Processes MCQs

Question : ‘Restriction’ in Restriction enzyme refers to (A) cleaving of phosphodiester bond in DNA by the enzyme. (B) cutting of DNA at specific position only. (C) prevention of the multiplication of bacteriophage in bacteria. (D) All of the above.  Answer : B…

CBSE Class 12 Biology Microbes in Human Welfare MCQs

Question :  The technology of biogas production from cow dung was developed in India largely due to the efforts of a) Indian Agricultural Research Institute and Khadi & Village Industries Commission b) Indian Oil Corporation c) Oil and Natural Gas Commission d)…

CBSE Class 12 Biology Strategies for Enhancement in Food Production MCQs

Question : India and China have more than 70% of world livestock population and produce the following percentage of world farm. a) 10 % b) 25 % c) 40 % d) 50 % Answer : B Question :  When breeding is between animals of the same breed it is called ______________, while…

CBSE Class 12 Biology Human Health and Disease MCQs

Question: Which of the following disease is confirmed by ‘widal test’? a) Tuberculosis b) Typhoid c) Plague          d) Tetanus Answer : B Question: The toxic substance, ‘haemozoin’, related to the high fever and chill, is…

CBSE Class 12 Biology Evolution MCQs

Question: Stanley L. Miller conducted experiments before 1953 on prebiotic earth environment using special apparatus. The primary surprising products were a) amino acids b) peptides c) nucleotides  d) simple sugars Answer : A  Question: Who proposed that the…

CBSE Class 12 Biology Molecular Basis of Inheritance MCQs

  Question: The two strands of DNA are held together by a) peptide bonds    b) phosphodiester bonds c) hydrogen bonds d) S – S bonds Answer : C  Question: Nucleotide arrangement in DNA can be seen by a) X-ray crystallography b) electron microscope c)…

CBSE Class 12 Biology Principles of Inheritance and Variation MCQs

Question: The crossing of F1 to homozygous recessive parent is called a) back cross b) test cross c) F1 cross     d) all of these Answer : B Question: The test cross is used to determine the a) genotype of the plant b) phenotype of the plant c) both a…

CBSE Class 12 Biology Reproductive Health MCQs

Question: According to which of the following organization "reproductive health means a total well-being in all aspects of reproduction"? a) WHL b) UNESCOc) WHO d) WWW Answer : C Question: Which one amongst the following is the first country in the world to initiate action…

CBSE Class 12 Biology Human Reproduction MCQs

  Question: The __________ lead to vas deferens that ascends to the ______ and loops over the __________. a) prostate, stomach, urinary bladder. b) epididymis, abdomen, urinary bladder. c) vas efferentia, abdomen, ureter. d) urinary bladder, ejaculatory duct, abdomen.…

CBSE Class 12 Biology Sexual Reproduction in Flowering Plants MCQs

Question : Ovules are attached to a parenchymatous cushion called a) nucellus               b) obturator c) conducting tissue d) placenta Answer : D Question : The point at which funiculus touches the ovule is a) chalaza b) hilum c)…