Chemistry: Solved Previous Year’s Question Paper for NCERT/CBSE  Class 12th Chemistry Paper Code (HSE2KROXI 9318—A)

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What are Vitamins? Name the sources and diseases caused by Vitamin B6
Answer: Vitamins are organic compounds that are essential in small amounts for the normal functioning of the body.
They can be obtained from a variety of food sources, including fruits, vegetables, dairy products, grains, and meats.
Sources of Vitamin B6 include fortified cereals, bananas, avocados, potatoes, nuts, and meats. Deficiency of Vitamin B6 can lead to anemia, depression, confusion, irritability, and skin lesions. Severe Vitamin B6 deficiency can cause nerve damage and an increased risk of heart disease.

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Zoology: Solved Previous Year Question Paper for NCERT/ CBSE Class 12th Zoology Paper code (RKDO18 ……20304-Z) 

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Question: What is the significance of “Lac”
Answer: “Lac” is short for the genus Lactobacillus. Many species of Lactobacillus are important in food production, as they are involved in the fermentation process to produce various dairy products, such as yogurt, cheese, and kefir. These bacteria also act as probiotics, providing health benefits to the consumer. Additionally, certain species of Lactobacillus are used in biotechnology to produce lactic acid and other compounds.

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Zoology: Solved Previous Year Question Paper for NCERT/ CBSE Class 12th Zoology Paper code (RKDO18 20304-X) 

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Color blindness, also known as color vision deficiency, is the inability to distinguish certain colors in the visible light spectrum. It affects around 8% of men and 0.5% of women, with the most common type being red-green color blindness.
Color blindness can be caused by genetic factors or acquired through injury or disease.
Symptoms include difficulty distinguishing between colors, difficulty identifying colors, and difficulty seeing color in low light or bright light.
Treatment for color blindness is not available, but people with the disorder can often find ways to adapt, such as using color-coded objects or specialized lenses.

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Zoology: Solved Previous Year Question Paper for NCERT/ CBSE Class 12th Zoology Paper code (SEIIRKON17-15321-A) 

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Dairy farming is the practice of raising dairy animals for the production of milk and other dairy products, such as cheese, butter, and yogurt. Dairy farming involves a variety of activities, such as breeding, feeding, and milking the animals, as well as caring for them and managing the overall operation of the farm. It also includes processing, packaging, and marketing of the dairy products.

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Zoology: Solved Previous Year Question Paper for NCERT/ CBSE Class 12th Zoology Paper code (HSEIIRKON1—-15321-A) 

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Write a short note on ‘MTP’.
Answer: MTP (Mixed Tissue Proteins) are proteins found in multiple tissues of the body. These proteins are involved in various functions such as cell signaling, metabolism, and other cellular processes. They are also involved in the cell-to-cell communication network.

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G20: Definition, Themes 2023, Logos, Objectives, History, Agenda and Importance

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The G20 is a worldwide conference that brings together the European Union and the 19 largest economies in the world, which together account for 85% of the world’s economic output. This conference was created in 1999 to advance global economic cooperation, sustainable growth, and stable international finance.

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Zoology: Solved Previous Year Question Paper for NCERT/ CBSE Class 12th Zoology

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Question: Define Immunity. Name its types.
Answer: Immunity is the ability of the body to protect itself from foreign substances, organisms, or toxins.
The three types of immunity are innate immunity, adaptive immunity, and passive immunity.

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Zoology: Solved Previous Year Question Paper for NCERT/ CBSE Class 12th Zoology Paper code (SEIIRKO-13-81020-Q) 

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Question: Define Fertilization. Briefly enlist the events that take place during Fertilization.
Answer: Fertilization is the fusion of a sperm cell and an egg cell to form a single cell that has genetic material from both the egg and the sperm.
Events that take place during Fertilization:
1. Sperm binds to the egg and penetrates its outer layer.
2. The sperm and egg nuclei fuse, forming a single nucleus.
3. The egg is activated and begins the process of cell division.
4. The zygote begins to divide into two cells, then four cells, and so on.
5. The zygote starts to travel down the fallopian tube towards the uterus.

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Botany: Solved Previous Year’s Question Paper for NCERT/CBSE  Class 12th Botany Paper Code (RKDO18 —–20303-X)

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Question: (i)What is primary productivity ?
(ii) Why does it vary in different ecosystems ?
(ii) State the relationship between gross and primary productivity.
Answer: (i) Primary productivity is the rate at which energy is converted into organic matter by living organisms such as plants within an ecosystem.
(ii) It varies in different ecosystems due to the availability of resources, environmental factors such as temperature and light intensity, and the presence of other organisms.
(iii) The relationship between gross and primary productivity is that gross productivity is the total amount of energy produced by an ecosystem, while primary productivity is the amount of energy converted into organic matter. Gross productivity is the sum of all primary production, as well as respiration processes such as decomposition and consumption.

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Botany: Solved Previous Year’s Question Paper for NCERT/CBSE  Class 12th Botany Paper Code (HSEIIRKON17—–15320-A)

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Question: With the help of a flow diagram explain the flow of energy in an Ecosystem.
Ans: → Solar Energy from Sun → Plants (Photosynthesis) → Consumers (Herbivores) → Consumers (Carnivores) → Decomposers (Bacteria and Fungi) → Nutrients (Carbon Dioxide, Nitrogen, etc.) → Plants (Respiration) → Consumers (Herbivores) → Consumers (Carnivores) → Decomposers (Bacteria and Fungi) → Nutrients (Carbon Dioxide, Nitrogen, etc.) → Solar Energy from Sun

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