Welcome to the Living World: 2019

Thursday, March 14, 2019

Reproduction in organisms Part 3 Sexual reproduction contd

Tuesday, March 12, 2019

11 Biotechnology principles n processes Part 2 Tools of biotechnology R...

Monday, March 11, 2019

11 Biotechnology principles n processes - Part 1 Principles

Biomolecules: Previous Year Questions Part 2

BIOMOLECULES

2013 MARCH

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BIOMOLECULES

2016 MARCH

1. Metabolites are organic compounds constantly utilized in various metabolic activities in the cells.

DIGESTION AND ABSORPTION

2013 OCTOBER (IMPROVEMENT)

No questions

MARCH 2014

1. Sketch an outline (or a flowchart) of protein digestion taking place in your alimentary canal. (3)

DIGESTION AND ABSORPTION

2016 MARCH

1. From the following list, pick out the enzyme, that takes part in carbohydrate digestion. (1)

BREATHING AND EXCHANGE OF GASES

2013 MARCH

1. Pick out the wrong one and justify your selection. (2)

BREATHING AND EXCHANGE OF GASES

2016 MARCH

1. Carbon dioxide transport in the form of bicarbonate ion is picturized below. Observe the diagram and identify the enzyme. (1)

BODY FLUIDS AND CIRCULATION

2013 MARCH

1. A person with A-ve blood group is injured severely in an accident. His relatives with A+ve and B-ve blood groups were ready to donate blood for him. Infer the consequences if he receives blood from them. (1)

BODY FLUIDS AND CIRCULATION

2016 MARCH

1. Longitudinal section of the human heart showing internal structure is given below. Observe the diagram and answer the following questions:

EXCRETORY PRODUCTS AND THEIR ELIMINATION

MARCH 2013

1. In a biology class related to excretion in the human body, a student gave an opinion that in every minute about 2% of the total blood volume of the body is converted to GFR whereas only 1% of this GFR is eliminated as urine. Evaluate this opinion and substantiate your answer. (2)

EXCRETORY PRODUCTS AND THEIR ELIMINATION

MARCH 2016

1. “The functioning of human kidney is efficiently monitored and regulated by hormonal actions of hypothalamus pituitary, JGA and to a certain extent by heart“

LOCOMOTION AND MOVEMENT

2013 MARCH

1. Observe the structural representation of the muscle given below:

LOCOMOTION AND MOVEMENT

2016 MARCH

1. “A contracted muscle becomes shorter and thicker but its volume remains the same.”

Neural control and coordination: Previous Year Questions Part 2

NEURAL CONTROL AND COORDINATION

2013 MARCH

1. Arrange the following processes in nerve impulse conduction in a sequential order. (3)

NEURAL CONTROL AND COORDINATION

MARCH 2016

1. Observe the diagram carefully and answer the following questions. (3)

CHEMICAL COORDINATION AND INTEGRATION

2013 MARCH

1. Fill the table appropriately. (2)

CHEMICAL COORDINATION AND INTEGRATION

2016 MARCH

1. Hormonal abnormality is responsible for certain diseases in man. List of some diseases are given below. Write the hormone related to each of it. (2)

HUMAN REPRODUCTION

2013 MARCH

1. The following statements compare the process of oogenesis & spermatogenesis. Which one is not true? (1)

HUMAN REPRODUCTION

2016 MARCH

1. Match the columns A and B: (2)

REPRODUCTIVE HEALTH

2013 MARCH

1. Suggest the ART which may be successful in the following conditions. (½ + ½ + 2=3)

REPRODUCTIVE HEALTH

2016 MARCH

1. Categorize the given birth control methods into three groups with proper heads.

PRINCIPLES OF INHERITANCE AND VARIATION

2013 MARCH

1. Identify the traits from the pedigree chart. Give one example each. (1+1 =2)

PRINCIPLES OF INHERITANCE AND VARIATION

2016 MARCH

1. Which of the following is not a Mendelian disorder?

MOLECULAR BASIS OF INHERITANCE

2013 MARCH

1. The flow of genetic information is shown below. Name the processes a, b, c & d. (4 x ½ =2)

MOLECULAR BASIS OF INHERITANCE

2016 MARCH

1. Result of a famous experiment is given in the figure. Answer the questions.

EVOLUTION

2013 MARCH

1. Arrange the following examples under two heads viz- homologous organs and analogous organs. (Score: 2)

EVOLUTION

2016 MARCH

1. Which theory talks about the huge explosion that leads to origin of universe? (Score: 1)

HUMAN HEALTH AND DISEASES

2013 MARCH

1. Most often HIV infection occurs due to conscious behavior patterns. Do you agree with this statement? Substantiate your answer. (2)

HUMAN HEALTH AND DISEASES

2016 MARCH

1. Identify the disease shown in the following figure and write the causative organism of the disease. (Score: 1)

MICROBES IN HUMAN WELFARE

2013 MARCH

1. Some bioactive molecules, their source and their medical importance are given in table. Fill up the missing parts. (2)

MICROBES IN HUMAN WELFARE

2016 MARCH

1. “BOD is commonly calculated as an index of water pollution.”

BIODIVERSITY AND CONSERVATION

2012 SAY

1. Last 20 years alone have witnessed the disappearance of 27 animal species from earth.

BIODIVERSITY AND CONSERVATION

2016 MARCH

1. Observe the concept diagram of the Evil Quartet of biodiversity loss.

Environmental issues: Previous Year Questions Part 1

ENVIRONMENTAL ISSUES

2010 MARCH

1. Destruction of forest leads to the increase of CO₂ in atmosphere. Recently Govt. of India instituted an award for individuals or communities from rural areas that shown extraordinary courage and dedication in protecting wildlife.

ENVIRONMENTAL ISSUES

2013 MARCH

NO QUESTIONS

2013 SAY

1. In a study conducted, the concentration of DDT found to increase in the successive trophic levels. The result of the study is shown below.

ENVIRONMENTAL ISSUES

2016 MARCH

1. Increase in the concentration of toxicants at successive trophic level is called

ECOSYSTEMS

2010 MARCH

1. During a study tour teacher showed the primary colonizers on the banks of the river ‘Nila’.

ECOSYSTEMS

2013 MARCH

1. Final community that is in near equilibrium with environment in ecological succession is called (1)

ECOSYSTEMS

2016 MARCH

1. Nutrients are never lost from the ecosystems and are recycled. Write about

ORGANISMS AND POPULATIONS

2010 MARCH

1. Given below is a table which shows the interspecific interaction. ‘+’ sign indicates beneficial, ‘-‘ sign indicates detrimental and ‘0’ indicates neutral.

ORGANISMS AND POPULATIONS

2013 MARCH

1. Read the statements below and identify the mode of interaction between the species. (2)

ORGANISMS AND POPULATIONS

2016 MARCH

1. a) Population interactions may be beneficial or not. Write any three interactions in detail. (Scores: 3)

BIOTECHNOLOGY AND ITS APPLICATIONS

2010 MARCH

1. Teacher asked Balan to write the principle of RNAi technology. Help him by describing the method. (1)

BIOTECHNOLOGY AND ITS APPLICATIONS

2013 MARCH

1. A novel strategy to prevent nematode manifestation is based on ‘RNA interference’.

BIOTECHNOLOGY AND ITS APPLICATIONS

2016 MARCH

1. The recombinant DNA technological process has made immense impact in the area of healthcare. How Eli Lilly produced Insulin? (Scores: 2)

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES

2010 MARCH

1. Raju is searching blight resistant plants for his crossing experiments. Unfortunately no such varieties are available.

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES

2013 MARCH

1. Jaya read in a Biotechnology book that alien DNA can be introduced into host cell by microinjection and biolistics. Explain these methods. (2)

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES

2016 MARCH

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

2010 MARCH

1. Johny, a Plus Two student is from a tribal colony with lower level of vitamins, minerals and protein deficiency. He wishes to be a plant breeder to help the public by producing new crops with high levels of vitamins, minerals, protein etc. identify the phenomenon. (2)

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

2013 MARCH

1. MOET is a programme for herd improvement. Expand MOET. (1)

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

2016 MARCH

1. (a) Resistance is the ability to prevent the pathogen from causing disease.

SEXUAL REPRODUCTION IN FLOWERING PLANTS

2010 MARCH

1. Given below in the diagram showing the transfer of pollen grains.

SEXUAL REPRODUCTION IN FLOWERING PLANTS

2013 MARCH

1. After syngamy and triple fusion in embryo sac, embryo will be diploid and endosperm will (1)

Pages

Thursday, March 14, 2019

Tuesday, March 12, 2019

Monday, March 11, 2019

BIOMOLECULES

BIOMOLECULES

DIGESTION AND ABSORPTION

DIGESTION AND ABSORPTION

BREATHING AND EXCHANGE OF GASES

BREATHING AND EXCHANGE OF GASES

BODY FLUIDS AND CIRCULATION

BODY FLUIDS AND CIRCULATION

EXCRETORY PRODUCTS AND THEIR ELIMINATION

EXCRETORY PRODUCTS AND THEIR ELIMINATION

LOCOMOTION AND MOVEMENT

LOCOMOTION AND MOVEMENT

Sunday, March 10, 2019

NEURAL CONTROL AND COORDINATION

NEURAL CONTROL AND COORDINATION

CHEMICAL COORDINATION AND INTEGRATION

CHEMICAL COORDINATION AND INTEGRATION

HUMAN REPRODUCTION

HUMAN REPRODUCTION

REPRODUCTIVE HEALTH

REPRODUCTIVE HEALTH

PRINCIPLES OF INHERITANCE AND VARIATION

PRINCIPLES OF INHERITANCE AND VARIATION

MOLECULAR BASIS OF INHERITANCE

MOLECULAR BASIS OF INHERITANCE

EVOLUTION

EVOLUTION

HUMAN HEALTH AND DISEASES

HUMAN HEALTH AND DISEASES

MICROBES IN HUMAN WELFARE

MICROBES IN HUMAN WELFARE

BIODIVERSITY AND CONSERVATION

BIODIVERSITY AND CONSERVATION

Saturday, March 9, 2019

ENVIRONMENTAL ISSUES

ENVIRONMENTAL ISSUES

ENVIRONMENTAL ISSUES

ECOSYSTEMS

ECOSYSTEMS

ECOSYSTEMS

ORGANISMS AND POPULATIONS

ORGANISMS AND POPULATIONS

ORGANISMS AND POPULATIONS

BIOTECHNOLOGY AND ITS APPLICATIONS

BIOTECHNOLOGY AND ITS APPLICATIONS

BIOTECHNOLOGY AND ITS APPLICATIONS

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES

BIOTECHNOLOGY- PRINCIPLES AND PROCESSES

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

STRATEGIES FOR ENHANCEMENT IN FOOD PRODUCTION

SEXUAL REPRODUCTION IN FLOWERING PLANTS

SEXUAL REPRODUCTION IN FLOWERING PLANTS

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